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					                                  Task A: ATLAS
     •       Faculty: M. Campbell, J. Chapman, H. Neal, G. Tarlé, R. Thun, B. Zhou
     •       Res. Physicists: E. Diehl, S. Goldfarb, D. Levin, S. McKee, Z. Zhao
     •       Tech. Support: P. Binchi, T. Dai, H. Schick, C. Weaverdyck, J. Yanchula
     •       Project supported personnel:
           J. Ameel, T. Bui, G. Berman, J. Boehm, S. Brunner, J. Degenhardt, S. Gerrish, J.
              Gregory, X. Guan,
           L. He, W. Lu, B. McClimon, S. Qiu, J. Reece, H. Shen, X. Tang, K. Udeshi, L. Wang, Q.
              Xu

     DoE site visit presentation (Sept. 9, 2002)
              –   Precision Muon Chamber Construction
                    • Introduction              B. Zhou (10”)
                    • MDT chamber production     E. Diehl (15”)
                    • QA/QC, and H8 test        D. Levin(15”)
              –   Chamber Readout Electronics
                    • Electronics design & test  J. Chapman (20”)
              –   Computing
                    • Overview                  H. Neal (5”)
                    • ATLAS computing           S. McKee (25”)

     Lab Tour (Sept. 10, 2002)               R. Thun, E. Diehl, Z. Zhao (30”)


              September 9, 2002                                          ATLAS DoE Site Review
UM ATLAS                                         1
                                  ATLAS Muon Spectrometer
                                                                   Design Goal:
                                                                   Standalone mode for new
                                                                   discoveries
                                                                   Precision Chambers:
                                                                   1200 MDT (370000 tubes)
                                                                     32 CSC (67k readout)
                                                                   Tracking accuracy: 50 μm
                                                                   Trigger Chambers:
                                                                   600 RPC (355k readout)
                                                                   200 TGC (440K readout)
                                                                   Pt threshold 6 & 20 GeV
                                                                   η range: -2.7–2.7
           End-cap precision chambers
                                                                   Momentum resolution:
           Inner rings: US (240 MDT, 32 CSC); Outer ring: Russia
                                                                   2% at 100 GeV Pt
           Three US MDT production sites: BMC, UM and UW
                                                                   10% at 1000 GeV Pt
           CSC production site: BNL


              September 9, 2002                                       ATLAS DoE Site Review
UM ATLAS                                          2
                                 ATLAS muon physics potential
                                    single muon final state

           New charged gauge boson
           discovery




             September 9, 2002                                  ATLAS DoE Site Review
UM ATLAS                                     3
                               ATLAS muon physics potential
                                  Di-muon final states




           September 9, 2002                                  ATLAS DoE Site Review
UM ATLAS                                   4
                               ATLAS muon physics potential
                                  Di-muon final states




           September 9, 2002                                  ATLAS DoE Site Review
UM ATLAS                                   5
                               ATLAS muon physics potential
                                  Four muon final states




           September 9, 2002                                  ATLAS DoE Site Review
UM ATLAS                                   6
                                  UM ATLAS Project

    • Large precision muon MDT detector construction
           -- Long tube construction R&D (1998 – 2000)
           -- Build 31,000 long MDTs & assemble 80 large chambers (2000 – 2004)
           -- Chamber service, integration tests and commissioning (2001 – 2005)
    • Electronics design, test and fabrication management for MDT readout
    • Computing


     ATLAS leadership roles of the UM group
     •US MUON MDT production coordinator – B. Zhou
     •Readout electronics integration / management – J. Chapman
     •US computing network leader – S. McKee
     •ATLAS computing collaboratory tool project leader – H. Neal
     •ATLAS muon database coordinator – S. Goldfarb



             September 9, 2002                                    ATLAS DoE Site Review
UM ATLAS                                     7
            Major Achievements of UM MDT Construction Project
       •   Intensive physics studies address urgent questions of MDT mass production
            – Physics / performance impact: wire locator & tube bending
            – Endcap chamber staging
       •   MDT mass production
            – 21,000 precision tubes built.
            – Total 51 chambers assembled (16 EMS5, 16 EMS4, 16 EML3, 3 EML4)
            – Wire position precision better than 25 microns.
            – 15% higher than expected production rate.
       •   Chamber services
            – Developed sensitive and efficient methods for gas system installation,
                debugging and certification.
            – 50 chambers equipped with certified gas systems, including 15 EMS5
                retrofitted at CERN in summer 2002.
       •   Crating and shipping large precision chambers
            – Design and construct the crates on site
            – 45 chambers shipped without damage to CERN.
       •   Sole institute for US chamber commissioning at H8 test beam
       •   Development and application of production DB
       •   Published 18 ATLAS technical papers and notes


           September 9, 2002                                   ATLAS DoE Site Review
UM ATLAS                                 8
                                   Major Technical Impacts
           •    Tube production
                 – Sole site to qualify the wire locator using optics system
                 – Found wire tension instability: due to twisters defects ==> avoids
                   potential wire breakage and incorrect wire tension at all production
                   sites
           •    Chamber tooling
                 – Material choice for straight combs avoids „bow‟ problem.
                 – Develop a simple method to correct bow problems in angle combs.
           •    Chamber service
                 – Redesign and prototype gas-bars.
                 – Found that brass tubelets have delayed leaks.
                 – Developed a simple method to test for long-term chamber leaks.
           •    Development of ATLAS MDT production database framework
           •    Technology transfer to other sites: tooling and database
           •    Chamber handling at CERN
                 – Design and fabrication of carts for handling various types of chambers .




               September 9, 2002                                       ATLAS DoE Site Review
UM ATLAS                                        9
              Impact on the momentum resolution due to wire sag
       Studies were based on ATLAS full simulation   100 GeV Pt muons
       and reconstruction programs (Dan Levin)
                      20 GeV Pt muons
            No sag
                                                                 No sag




            With sag



                                                                  With sag




           September 9, 2002                          ATLAS DoE Site Review
UM ATLAS                                10
                      Unique UM MDT production facility




              Ed Diehl oversees the production

           September 9, 2002                      ATLAS DoE Site Review
UM ATLAS                                  11
                       Mission at CERN in 2002 summer
                                                   Zhengguo Zhao led a UM
                                                   student team at CERN in 2002
                                                   summer:

                                                   • Prepare four US chambers for H8
                                                   beam test at CERN




            CERN ISR building
           • Retrofit 15 EMS5 chamber gas
           system, certify that the chamber
           leak rate met the ATLAS
           specification




              September 9, 2002                                 ATLAS DoE Site Review
UM ATLAS                                      12
                   MDT Production Quality Control Database

                                               S. McKee leads the effort




           September 9, 2002                        ATLAS DoE Site Review
UM ATLAS                           13
                   MDT Tasks in 2003-2005
           •     Finish the MDT construction (80 MDT chambers)
                  – US ATLAS schedule: July 2004.
                  – UM target date: Dec. 20, 2003.

           •     Chamber completion
                  – Long-term check for chamber gas leaks
                  – Installation and test of chamber HV system
                  – Installation and test of front-end electronics
                  – Establish facility for pre-commissioning endcap chambers at CERN
                  – Pre-commissioning at CERN

           •     CERN H8 Test Beam
                  – Software development for test beam experiment
                  – Final system performance test (2003)

           •     EE chambers (muon upgrade project)*
                  – Construct additional 16 large chambers (2004)

           •     Installation and cabling of endcap chambers on big wheel (2005)

               September 9, 2002                                    ATLAS DoE Site Review
UM ATLAS                                      14
           MDT Chamber Production

                  Edward Diehl




UM ATLAS
           Michigan MDT Tube & Chamber
                     Production     MDT
                                   chamber
       •     We are building 31,000
             Monitored Drift Tubes
             (MDT) into 80 chambers in
             5 different types: EMS4,
             EMS5, EML3, EML4, and
             EML5.

           • Chambers are 2m wide, 36cm high and range in length from 3-6m.
           • Chambers consist of 6 layers of 64 tubes.
           • Tube and chamber tolerances are very strict. Wire position is
             controlled to < 25m to insure precision tracking.
           • 21,000 tubes and 51 chambers have been constructed.

             September 9, 2002                              ATLAS DoE Site Review
UM ATLAS                                 16
      MDT Tube & Chamber Production




           •   Michigan has maintained continuous production for 2 years and expects to
               finish MDT construction in Dec, 2003.
           •   Production has become more challenging due to the increased size and quantity
               of components. Nevertheless, we have maintained stable production rates due
               to increased efficiency.


               September 9, 2002                                      ATLAS DoE Site Review
UM ATLAS                                      17
           Michigan MDT Tube Production
    •      Production began in Sept, 2000: we have built 21,000 of 31,000
           tubes.
    •      Two operators assemble 250 tubes/week.
    •      Rigorous quality control tests require an additional 2.5 FTE‟s.
    •      Logistics require 1 FTE.
    •      Michigan is at the forefront of ATLAS MDT production, and
           has identified several problems with MDT parts, for example
           wire locator burrs & endplug machining problems.




             September 9, 2002                         ATLAS DoE Site Review
UM ATLAS                              18
              MDT Construction Logistics




           September 9, 2002        ATLAS DoE Site Review
UM ATLAS                       19
                        MDT Tube Components
                                                  Endplug

                                                                 Wire locator


                                   HV Cap
                                                                    Endplug attached
                                                                    to aluminum tube


           •   An MDT drift tube is constructed from an extruded aluminum tube,
               0m W-Re wire, and 2 endplugs which position the wire, and provide
               gas and electrical connections.
           •   Inside the endplug is a wire locator which positions wire to <m
               concentricity with respect to the precision outer surface of the endplug.
           •   Endplugs must be cleaned and assembled before tube assembly .

               September 9, 2002                                   ATLAS DoE Site Review
UM ATLAS                                     20
               Michigan MDT Tube Room
 •   Michigan has a room dedicated to
     MDT tube production and quality
     control tests.
 •   The room contains an optical table
     with special fixtures for tube wiring
     and additional equipment for tube
     length measurement, wire tension
     measurement, tube leak checking,
     and wire position measurement.
                                              Tube wiring table
 • Tube assembly is controlled by computer and tube data is
   automatically logged to an online database.

           September 9, 2002                     ATLAS DoE Site Review
UM ATLAS                           21
           MDT Tube Assembly Fixtures
                                          Fixed Platform




                                                         Movable
                                                         Platform


• The wiring table has 2 platforms
to hold the tube ends.
• One   platform is movable to
adjust for different tube lengths.



           September 9, 2002                  ATLAS DoE Site Review
UM ATLAS                             22
     MDT Tube Quality Control Fixtures
                                                      Dark Current Stand




                                 Tube Leak Detector
           Tube Length &
            Wire Tension
            Measurement
             September 9, 2002                        ATLAS DoE Site Review
UM ATLAS                               23
                 MDT Chamber Production
           • Michigan chamber production began in Oct. 2000, and has
             now completed 51/80 chambers.
           • Initially, only base chambers were assembled (without
             services), but as parts have become available we have
             incorporated new parts into the production process:
              o Sept 2001: begin chamber gas system installation
              o Nov 2001: begin chamber T sensor & survey target installation
              o Oct 2002: start HV board installation when they become available.
           • Chambers are shipped to CERN when completed – 45 so far.
             Chambers are inspected for damage/wire breakage at CERN
             – one broken wire found.
           • Chamber mechanical tolerance is monitored during
             construction and re-measured at CERN with an x-ray
             tomograph. Michigan chambers meet m tolerances.

             September 9, 2002                                     ATLAS DoE Site Review
UM ATLAS                                    24
                Chamber Assembly Room
• Tubes are positioned on combs:            Granite table with combs and glue machine
aluminum bars with v-cuts to hold
tubes via suction cups. Combs are
aligned to < 25μm with multiple
techniques (micrometer, stretched
wire, laser) before chamber
production.
• Chamber layers are glued in a
clean room on a granite base using
precise fixtures to control
mechanical tolerances.
• A glue machine runs on rails on the granite to deposit glue on each layer.
• After gluing a tube layer is lifted via vacuum chuck by a special lifting frame called
   a stiffback. Multilayers are built up one layer at a time on the bottom of the
   stiffback.
• The stiffback is positioned on a tube layer by means of sphere block towers to set the
          spacing between layers.

           September 9, 2002                                   ATLAS DoE Site Review
UM ATLAS                               25
                    Chamber Gluing Process



           Lay tubes on combs           Glue tubes




             Lower stiffback         Stiffback sitting on
             onto tube layer            sphere blocks
           September 9, 2002              ATLAS DoE Site Review
UM ATLAS                        26
           Spacer Frame Assembly/Gluing
                                            Chamber spacer frames are
                                            assembled on a special table
                                            outside the chamber gluing
                                            room.


    Spacer frames are glued onto 2
    multilayers to complete a base
    chamber.
    After gluing the chamber is
    ready for services installation.

           September 9, 2002                       ATLAS DoE Site Review
UM ATLAS                               27
     Chamber Building Quality Control
           OPS Tower




                                       Rasnik mask
           •    Chamber mechanical tolerances (<m) are monitored during
                construction with the Optical Position System (OPS) utilizing a coded
                mask (“RASNIK”). This system measures the position of each layer to
                an accuracy of 1
           •    At CERN chamber mechanical tolerances are checked with a 3D x-ray
                tomograph which images the wires of all 6 tube layers. One chamber of
                each type has been x-rayed and all meet specs.

               September 9, 2002                                ATLAS DoE Site Review
UM ATLAS                                   28
            Chamber/Tube Handling Fixtures
      Tube transport box




                                Chamber handling cart
           September 9, 2002                 ATLAS DoE Site Review
UM ATLAS                       29
                           Chamber Shipping
• Michigan has designed a chamber shipping box with steel frame, foam padding,
  plywood sides and shock sensors.
• So far, 45 chambers have been shipped to CERN without mishap. Chambers are
  inspected at CERN for damage and wire breakage.




 Chamber shipping box without side panels        Loading chamber box into
                                                    shipping container.

           September 9, 2002                             ATLAS DoE Site Review
UM ATLAS                             30
           QA/QC and H8 Test

                Dan Levin




UM ATLAS
                          Quality Assurance & Control

                                                   Or

                                     Will the damn thing work?




                          “We are what we repeatedly do. Excellence, then, is
                          not an act, but a habit.”
                                    --Aristotle



   Tube QAQC
   Chamber Services & Testing
   Cosmic Rays
   H8 Test Beam @ CERN




           September 9, 2002                                             ATLAS DoE Site Review
UM ATLAS                                          32
  The QAQC Challenge


                                   Large Multinational Projects


                                    Babylon: Low precision




                                     Geneva: High precision




  How to build a ½-football field long, 5 story structure with more than ¼ million drift tubes where:
  1.   The positioning of every element is known to within 25 microns.
  2.   Each tube is immaculate, leak tight, physically stable, electrically sound and works flawlessly.
  3.    Mass production is conducted in a university environment, not a factory.

          AT UMICH we have implemented a QAQC system for the longest tubes and largest chambers to
           be used in ATLAS.
          Our construction and QAQC practices are designed to build & certify over 30,000 drift tubes and
           over 80 chambers with < 2% tube rejection.
          Since Summer 2000, we have produced/certified over 20,000 tubes and 50 chambers.


             September 9, 2002                                              ATLAS DoE Site Review
UM ATLAS                                            33
                    The Drift Tube Test Gauntlet




           September 9, 2002                       ATLAS DoE Site Review
UM ATLAS                                 34
  Rejection factors: %
                 Feb-02         Jun-02
     Length:          0.33           0.3
     Gas Leak:        0.33           0.25
     Dark Current     0.24           0.23
     Wire Tension 0.29               0.31
     Re-tension       0.14           0.06
     Wire Position 0.09              0.1
     Broken Wire      0.26           0.28
     Things too embarrassing to mention  0.25%

                  Total rejection rate of produced tubes < 1.6%


           September 9, 2002                                ATLAS DoE Site Review
UM ATLAS                                35
           0         10            20   30       40     50     60      70         80 86
                                             weeks since Oct 2000
               September 9, 2002                                    ATLAS DoE Site Review
UM ATLAS                                         36
   MDT Chamber Services: After gluing, what then?
   An enormous work detail remains:
   1.    Assemble/install gas manifold and Faraday Cage base plates
   2.    Leak test certification
   3.    Temperature and magnetic sensors
   4.    Misc: Platforms for survey targets, barcode labels
   5.    Install the chamber survey targets
   6.    Install HV hedgehog cards, and perform chamber HV test
   7.    Install signal hedgehog and mezzanine cards
   8.    Install the complete Faraday cages
   9.    Test with cosmic rays
   10.   Install chamber service modules (readout)


   The bulk of this work (1-5) is routinely done in the production cycle.
   We are first group in ATLAS to develop and use quick, effective gas system implementation.
   Our expertise has been transmitted to all other sites.




           September 9, 2002                                          ATLAS DoE Site Review
UM ATLAS                                    37
   Effort for chamber services (partial)
           Item                    Effort (human-days)   # parts (eg, in EMS5)
           Faraday Cage Bases     1                      2336

           Gas Tubelette assembly .75 *4 =3              4608

           Gas Manifold           .5*4=2 or more         8
           Assembly & Leak
           Check
           Manifold Install       .25                    1536

           Chamber Leak Debug     4                      -
           &Test
           HV & RO Hedgehog       .5                     116
           Cards
           Faraday Cage           .25                    >500
           sides+covers
           Mezzanine Cards        .25                    >200
           & FC covers
           Totals                 9                      ~ 10,000
            September 9, 2002                                  ATLAS DoE Site Review
UM ATLAS                                  38
    Gas System Performance

    Series EMS4: 16 certified
    Series EML3: 16 certified
                                                           (a)
    Series EMS5: 16 certified
    Series EML4: 2 certified


           Specification
                                                           (b)




                                                           (c)




              September 9, 2002        ATLAS DoE Site Review
UM ATLAS                          39
           Reality I: Certified in US then shipped to CERN:

           Chamber                             Leak mb/day          Status
           Mich: EMS4 01 ml1             7                     4 times spec
                 EMS4 01 ml2           0.8                   OK
                   EMS4 02 ml1           12                   6 times spec
                 EMS4 02 ml2            .9                   OK
           Seattle: EML2                  6 +/- ~4            OK
                   EMS2 ml1             10                    5 times spec
                  EMS2 ml2             2                     OK

           Conclusion:
           1.  Most MLs near or at spec.
           2.  Some small leaks (10 -(5-6) std cc/sec) found, none serious.
           3.  No ruptures, blown O-rings, catastrophic failures.


            September 9, 2002                                  ATLAS DoE Site Review
UM ATLAS                                  40
  Reality II (Ann Arbor)
                                          dp/dt is stable at 0.3 ATLAS leaks
                                          then increases to > 5 AL.
                                          This effect is observed on a few EML3
                                          chambers.
                                          Reasons

                               Sources of new leaks after certification (based on 11 Chambers)
              spec
                               1.        Leaks observed after repressurization, or,
                               2.        During long term pressurization.



                               1.        ½-Jumpers: 26 repaired, most at 10-5 to 10-6 std cc/sec

                               2.        Signal Caps O-rings: 39 found, most in 2 chambers

                               3.        Gas bars: 1 leak found

                               4.        Pinholes in Heim Co. tubelettes: 20 found, distributed
                                         mostly around the bends or at the nib.




           September 9, 2002                                      ATLAS DoE Site Review
UM ATLAS                            41
    The Tubelettes Problem

    Tubelettes capillaries provide parallel gas feed from manifold to/from individual drift
        tubes. We have used & rejected 3 types:

    1.     Stainless Steel. Too $$

    2.     Fully annealed brass (ATB). Too

    3.     ¾ Hard brass. (Heim). Diligent UM leak testing revealed pinholes & cracking.
           Problem turned out to be at all US sites. Uncertain if European production
           affected.

    4.     Interim solution circumvented at UM by:
           •    Hard work: leak testing, parts replacement.
           •    Preventive: Epoxy coating of susceptible regions.
           •    Long term testing.

    5.     Permanent solution.
           •   New production of Brass and (much less expensive) Stainless being
               prepared for evaluation.
           •   Will select based on proven leak tightness, reliability, cleanliness, material
               properties (magnetic, softness), lead-time and cost.


            September 9, 2002                                        ATLAS DoE Site Review
UM ATLAS                                     42
    Long Duration Testing

    Post-certification leaks demand long term test

    Concept:
        1.      Pressurize to 3 bar. Attach Presta valve.       
        2.      After 1 yr @ ATLAS specs, pressure will drop by
                ~1/2 bar.
           3.   Leaky chambers will likely lose all or most of their
                pressure.
           4.   It is an easy task to identify leaky chambers.
           5.   Reduce time consuming testing during the chamber
                commissioning

    Method:
        1.      After certification, pressurize chamber ML to 3 bar
                Argon.
           2.   Seal each ML with plugs (one end) & with Presta valve
                (other end)
           3.   Affix labels indicating date, initial pressure, gas, etc.

    Practice:
         1.     50 UM chambers now under long-term pressurization.
         2.     Follow up in Spring: Measure with simple gauge  
         3.     Other production sites to follow.
            September 9, 2002                                               ATLAS DoE Site Review
UM ATLAS                                        43
  Cosmic Ray Muons in EMS5

  This is the first large endcap MDT Chamber to be tested.

  Chamber assembled during Summer 2001.
  Readout electronics: Mezzanine lite + CSM0

  ATLAS Operating Parameters
  Gas Ar 93% CO 2 7% HV=3080
  TDC Threshold level=114 units (60 mV, 20 electrons)

  Rate 40 Hz of mostly soft muons
  Avg P ~ few hundred MeV
  MCS at layer 6: 200  rms at 1 GeV

  Data analysis goals: Evaluate basic performance

  Tube hit distribution
  TDC spectra
  Noise levels
  Tracking
  Residuals
  Efficiency




            September 9, 2002                                ATLAS DoE Site Review
UM ATLAS                                              44
                                                                    # hits/trigger




                                                            slope        intercept




                                                                             Residuals (double gaussian. +
                                                                             hardness cut)
                                                                             sigma=77 u




                        • data
                        GARFIELD Ar/CO2 93/7 @ 3 bar

           September 9, 2002                                          ATLAS DoE Site Review
UM ATLAS                                               45
      ISR + H8 (Test Beam) + Pilot Commissioning

       Part supply delays + no local chamber storage 
            •    We installed gas systems on all EMS5 chambers @ CERN ISR, May-August.

      This work engaged more than 2 FTE Physicists & more than 5 FTE students for 3 months.

      The ISR campaign firmly established:
           1.   US ATLAS Muon group as an entity at CERN.
                Many institutions reps visited and took great interest and respect in the magnitude of our
                      activities.
           2.   Crystallized for ATLAS management the critical need for lab space + resources.
           3.   First hand experience in the operations & resources necessary for chamber
                commissioning.

      This effort paired with ATLAS-wide beam test @ H8. We undertook:
           •      Commissioning US End-cap chambers (Washington & BMC)
           •      Configuring of gas, HV+RO electronics in beam
           •      Providing extensive assistance to Russian colleagues.
           •      Manpower for initial data runs

      FY 2003
      1.   Continued participation in H8 test-beam activities.
           •    Emphasis on end-cap chamber performance and alignment
           •    Completion of one Senior Thesis.
      2.   The H8 work is essential to operation of the MDT Rasnik beams and temperature readout
           systems needed to achieve design resolution.


           September 9, 2002                                              ATLAS DoE Site Review
UM ATLAS                                        46
   ISR tunnel & UM team                           Gas system installation




                                                 Pressurize to 3 bar
                         DAQ for certification
                                                 Check again next Spring




                        Leak debug               Digital P gauge
           September 9, 2002                                       ATLAS DoE Site Review
UM ATLAS                                   47
           US chambers at H8




                                    EIS+EIL
     EMS+EML




           September 9, 2002                  ATLAS DoE Site Review
UM ATLAS                       48
   QAQC Summary

   1.      Successful mass production of high precision drift tubes and chambers:
           •   Over 20,000 fully tested high quality drift tubes made at 50/day.

   2.      Three production runs (60% of MOU) of electronics ready chambers.
           •     UM provides benchmark production rate for chamber completion.

   3.      Cosmic Ray test indicate high efficiency, design resolution attained.
           •  Chamber continues to see service as electronics test bed.

   4.      Gained an important beachhead at CERN.
           •     Our presence both in terms of long term chamber storage and commissioning is being
                 recognized and imitated.

   5.      Deployed US chambers for H8 beam test.
           •   This is first comprehensive running of a full MDT tower with alignment and
               environmental monitoring. Planning major effort in DAQ and analysis over the
               coming year.




               September 9, 2002                                         ATLAS DoE Site Review
UM ATLAS                                        49
           MDT Electronics at UoM

               J. Wehrley Chapman
           Reporting work of many others



UM ATLAS
                2001 Summary/2002 Plans
       Contributions from Michigan
           –   Overall design of on-chamber readout scheme
           –   Readout multiplexer, CSM-0, at 9 institutes, X5, & H8
           –   Setup of readout electronics at H8 – 6 CSM-0 units
           –   Programming for H8 readout and AMT & ASD testing
                 • MiniDaq user friendly, flexible, windowing daq system
                 • Exceptional work by J. Gregory (CSM-0 driver in Daq-1)
                 • Testing and analysis code for ASD (again J. Gregory)
           – Testing and certification of front-end electronics
                 • For KEK AMT-1 and AMT-2 (serious shortcomings found)
                 • Harvard/BU ASD and mezzanine card testing (major job)
                 • Extraordinary work on a very short schedule. (T. Dai)
           September 9, 2002                                ATLAS DoE Site Review
UM ATLAS                                51
               Front-end Electronics
                  Tests at Michigan

           J. Chapman, T. Dai, & T. Bui at Michigan




UM ATLAS
           Octal AMT & ASD Certification


           The Michigan DAQ Package




UM ATLAS
                               Goals of the Tests

            • Measure noise width and offset.
            • Examine high-rate behavior.
            • Hits/event vs trigger rate (I/O traffic test).
              (Problem above 20KHz).
            • Measure drift spectrum & pulse width.
            • Operate in pair & edge modes.

           September 9, 2002                    ATLAS DoE Site Review
UM ATLAS                              54
                 ASD Threshold Sweeps

           • Noise runs (no input signal) with threshold varied
               – Range: -50mv to +50mv in 2mv steps
               – Nominal running threshold is -60mv
           • Fit observed peak to Gaussian distribution
           • Offset of center defines –60mV threshold
               – Large offsets --> hot (or cold) channels
           • Sigma is measure of channel noise
               – Average width for all channels is ~9mV
               – Running with -60mV threshold        very quiet!
           September 9, 2002                           ATLAS DoE Site Review
UM ATLAS                             55
                          Thresh Sweep Raw Data I
                                Mezz Board 434-01 (4x6)




           September 9, 2002                              ATLAS DoE Site Review
UM ATLAS                              56
                       Thresh Sweep Raw Data II
                               Mezz Board 434-01 (4x6)




           September 9, 2002                             ATLAS DoE Site Review
UM ATLAS                              57
                  UoM AMT & ASD settings

           To the right is the setup
           screen for the ASD.
           Below is the AMT setup



                                            Important settings:
                                                 Search Window = 1.825s
                                                 Match Window = 1.2s
                                                 ASD Deadtime = 790 ns
                                                 Cosmic data is taken with
                                                 leading/trailing mode.
                                                 Other tests are done in pair mode

              September 9, 2002                            ATLAS DoE Site Review
UM ATLAS                               58
                               Triggers
                                                  400 Ticks




            1. Cosmic trigger (24Hz)
                   ORed with
            1. Continuous pulser
               trigger from 100Hz to
               100KHz.




           September 9, 2002              ATLAS DoE Site Review
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                       High Rate Test Difficulties

           • AMT-2 level 1 buffer address “bug” has
             two effects that complicate precise testing.
              – At high trigger rates & modest hit rate, hits lost.
              – At high trigger rates, readout of hits not in the
                match window occur. Noise is exaggerated.
           • With DAQ used, full readout is limited to a
             few KHz. For trigger rates up to 100KHz+
             prescale sampling was employed.
           September 9, 2002                       ATLAS DoE Site Review
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                   Conditions for Hit Miss




           September 9, 2002          ATLAS DoE Site Review
UM ATLAS                       61
                False hits above 20KHz
                                         Plot shows hit
                                         rate at 60mV
                                         threshold in a
                                         1.2 s match
                     ~8 fold Rise
                     at 20KHz            window. Rate is
                                         a few hits per
                                         10,000 events
                                         in each channel
                                         below 20KHz
                                         & rises 8 fold at
                                         high rates.
           September 9, 2002                   ATLAS DoE Site Review
UM ATLAS                            62
                           ASD Noise Pulse Width

          ASD noise feature
       • ASD main threshold is
         set to –10mV. One
         expects that most hits
         are introduced by ASD
       • For this case the pulse
         width seen is narrow,
         around 20ns


           September 9, 2002              ATLAS DoE Site Review
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                   Cosmic Ray Spectrum



                                           ASD Noise




           September 9, 2002        ATLAS DoE Site Review
UM ATLAS                       64
                                Conclusions
           • From an operational standpoint the ASD works without problems
             & meets or exceeds design specifications.
           • The noise width & offset are within specifications when a few
             percent of the chips are discarded. Anticipate 3 classes: excellent,
             good spares, & rejected.
           • The measured hit rate for a HV-on-chamber is about 1KHz per
             mezzanine card when the ASD threshold is 60mV. This rate is
             consistent with real tracks.
           • We observe & measure cosmic rays with good efficiency.
           • We are unable to perform high rate tests due to an observed
             AMT-2 problem. We are committed to rapid certification of the
             AMT-3 in late 2002.
           • The time digitizer section of the AMT-2 operates as designed in
             pair and edge modes.

            September 9, 2002                                ATLAS DoE Site Review
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           CSM Development

           The optical output CSM
           Status September 2002
                 J. Chapman




UM ATLAS
                             CSM Characteristics


           •     Small 80mm x 140mm board
           •     Gigabit ethernet transmission to MROD
           •     Single FPGA, PS regulators, Fanouts
           •     JTAG, FlashRam, and DCS configuration
           •     Attaches to on-chamber motherboard
           •     Skip to CSM (TTCrx replaces oscillator)

               September 9, 2002              ATLAS DoE Site Review
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                         Motherboard (1/chamber)
  Power In




                                                        DCS/TEST
                                                        Connectors
   Mezzanine
   Connectors




           September 9, 2002             ATLAS DoE Site Review
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                        CSM Artwork (1/chamber)




           September 9, 2002           ATLAS DoE Site Review
UM ATLAS                       69
                                Goal & Schedule

           • Goal: Provide CSM & MROD to H8 2003
              –   Assembled CSM at Michigan in November
              –   Test CSM to MROD at NIKHEF in December
              –   Fabricate several CSMs and MRODs in Spring
              –   Arrive at CERN with units in early May 2003
           • Needs: Hardware and Daq-1 software for:
              TTC(Rome), MROD(NIKHEF), & CSM(Michigan)
              Manpower from Michigan, NIKHEF, & Rome 3
            September 9, 2002                   ATLAS DoE Site Review
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           UM ATLAS Computing
                Activities
                  H. Neal
                 9/9/2002




UM ATLAS
                             ATLAS Computing
           • Introduction (Homer Neal)
           • ATLAS Computing Projects at Michigan (Shawn McKee)
               –   Simulation and Staging Studies
               –   Production Database
               –   Networking Activities
               –   Grid Activities
               –   Collaboratory Tools
           • ATLAS Muon Database (Steven Goldfarb)




             September 9, 2002                      ATLAS DoE Site Review
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                                   ATLAS Computing Site Visit Agenda
                                                    April 24, 2002
                                                Department of Physics
                                                University of Michigan
                   9:30 am     Overview
                                              Welcome (Chapman)
                                              Introductions (Zhou)
                                              Program Details (Neal)
                   9:45 am       Status of Michigan ATLAS Non -Computing Projects
                                              MDT Production (Zhou)
                                              MDT Electronics (Chapman)
                   10:00 am      General UM ATLAS Computing Efforts
                                              MDT Simulation and Staging Studies (Levin)
                                              ATLAS Muon Database Coordination (Goldfarb)
                                              MDT Production Database (McKee)
                                              ATLAS Trigger Database (Chapman)
                                              Collaboratory Tools: WLAP Project (Neal)
                   11:30 am      UM ATLAS Core Computing Contributions
                                              Authenticated QoS Project (Adamson)
                                              USATLAS Networking (McKee)
                                              Michigan GRID Testbed Project (McKee)
                   12:30 – 1:15 pm            LUNCH


           September 9, 2002                                                      ATLAS DoE Site Review
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                         1:15 pm     UM ATLAS Core Computing Contributions (Continued)
                                                  UM Grid and Network Technology Efforts (Hacker)
                                                  Michigan Gigabit Network Test Results (McKee)
                                                  GEANT4 and CMT Web Training Archives (Myers)
                         1:45 pm     Relevant University Infrastructure
                                                  Center for Advanced Computing/ NPACI (Martin)
                                                  Life Sciences Computing Infrastructure (Hacker)
                                                  Center for Information Technology Integration (Adamson)
                                                  Michigan NMI Testbed (McKee)
                                                  MGRID Overview (Neal)
                                                  MGRID (Proposed UM Grid Research Center) (Martin)
                         2:45 – 3:45 pm           Executive Session
                         4:00 – 5:00 pm           Tours
                                                  Tour of Media Union Facilities (Videoconf., computing, etc) (Hacker)
                                                  Virtual Reality Display of Muon Detector (Goldfarb)


           September 9, 2002                                                        ATLAS DoE Site Review
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           Group Computing Contributions to ATLAS Core Computing
                            and Detector Support



                                                             Detector Support




                                                              Core Computing




                                                              Infrastructure




           September 9, 2002                    ATLAS DoE Site Review
UM ATLAS                        75
                               MGRID Project




           September 9, 2002                   ATLAS DoE Site Review
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           Michigan ATLAS Computing
                     Projects
                  Shawn McKee




UM ATLAS
                                  MDT Simulations at UM

                               Objective Oriented Programming

                                     D. Levin & B. Zhou

                       UM serves as an ATLAS-wide MDT simulation factory
           We have addressed critical design, staging and operational issues of
           the muon system.

   1.      “Tube Bending” Problem: Result: Build chambers w/o deforming tubes
   2.      Chamber Staging (Lehman suggestion): Deploy all of EI,EM,EO. Stage
           EE at later time.
   3.      CSC Staging: Build half-system initially. Expand for full luminosity.
   4.      Alignment Studies: Phase 1. Evaluate impact of limited alignment
           system corrections to positions.
   5.      MDT Upgrades: Contribution to physics of EE chambers.
   6.      H8 test-beam data analysis will be primarily performed at Michigan


           September 9, 2002                                    ATLAS DoE Site Review
UM ATLAS                                    78
Example 1: Tube Bending
     •     Wires in non-vertical drift tubes follow off axis
           catenary  bifurcated RT relation.
     •     Baseline solution: Bend drift tubes to conform to the
           wire. Difficult & time consuming.
     •     Results of UM investigation:
           1) Average degradation to momentum resolution and
              reconstruction efficiency is minimal.
           2) Errors in RT relation are systematic and correctable.
           3)  Build chambers w/o bending tubes.




           September 9, 2002                          ATLAS DoE Site Review
UM ATLAS                            80
Example 2: End-cap Chamber Staging
DOE/NSF Lehman review recommends:
   US ATLAS deliver according to MOU with ATLAS
   management and not to TDR baseline configuration
    build 240 (and not 320) chambers &
    ½ CSC chambers at LHC Initial phase
Configuration which has least impact on Day One of LHC
   running:
  1. descope EEL/S Chambers.
  2. descope CSC doublets to singlets .
  3. descope high rapidity EOL/S

           September 9, 2002            ATLAS DoE Site Review
UM ATLAS                       81
                 Production Database Software
                     Development at UM
     • Michigan has created a       • Has proven very useful
       set of generic production      for production monitoring
       database software tools      • Extensible to almost any
     • Our system is based upon       database
       the global production        • Easy to add functionality
       database for the MDTs        • Some components are
     • Data can be automatically      used in the ATLAS-wide
       converted to PAW CWN           muon production DB
       (column-wise ntuples)

           September 9, 2002                  ATLAS DoE Site Review
UM ATLAS                       85
                                General Strategy
           • Track all required production information
           • Minimize burden on those producing tubes
             and chambers
           • Automate data acquisition wherever
             possible to reduce errors and workload
           • Create storage schema that match
             production data generation


            September 9, 2002                  ATLAS DoE Site Review
UM ATLAS                             86
           Production Database: What‟s it
                     good for?
       • Production feedback => finding problems early
       • The data is required to do proper QA/QC
       • Documenting the detector:
           – Long term use possible for data analysis
           – May be needed to correlate with future observed
             problems
       • Logistics and inventory management are also
         easily tracked with the same framework
           September 9, 2002                  ATLAS DoE Site Review
UM ATLAS                       87
                 UM ATLAS Production Database
            http://atlas.physics.lsa.umich.edu/aspdb/main.asp

    Major Features:
    • DB table content editing via    • “Drill-down” web pages and
      authenticated web access          plots dynamically generated at
    • Production efficiency and         access time
      QA/QC monitoring                • Automated nightly data
    • Inventory management via a        acquisition and sanity checking
      web interface                   • Chamber “checklists” online on
    • Automated global DB export        the web
                                      • Chamber specific DB subsets
                                        available for download

           September 9, 2002                       ATLAS DoE Site Review
UM ATLAS                         88
                                 Daily QA/QC Plots
           • Daily plots generated
             each night
           • Primary tube QA/QC
             information is
             monitored
           • Blue is all data
           • Yellow is last 30 days
           • Red is last 10 days


             September 9, 2002                  ATLAS DoE Site Review
UM ATLAS                               89
                         Monitoring Rejection




           September 9, 2002              ATLAS DoE Site Review
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                  Data Processing Summary




           September 9, 2002        ATLAS DoE Site Review
UM ATLAS                       91
                Data Processing by Station
                        Summary




           September 9, 2002        ATLAS DoE Site Review
UM ATLAS                       92
                 Weekly Wiring Production




           September 9, 2002        ATLAS DoE Site Review
UM ATLAS                       93
           Example “Drill down”: DC Day




           September 9, 2002        ATLAS DoE Site Review
UM ATLAS                       94
            AutoPlot of DC Day Avg Data




           September 9, 2002        ATLAS DoE Site Review
UM ATLAS                       95
            Edit Tables (ORing Inventory)




           September 9, 2002        ATLAS DoE Site Review
UM ATLAS                       96
                               Chamber Checklist




           September 9, 2002                  ATLAS DoE Site Review
UM ATLAS                             97
              Downloaded Export DB Files




           September 9, 2002        ATLAS DoE Site Review
UM ATLAS                       98
                   Rome “Copy” of UM DB




           September 9, 2002        ATLAS DoE Site Review
UM ATLAS                       99
                    Production DB Summary
           • We have a working production database
             system supporting the construction task.
           • The system we developed has been used at
             other sites (Beijing, Cosenza) as well as at
             the central production site (Rome).
           • There is a significant amount of software
             development work which can be extended
             for other uses (D0)…

            September 9, 2002                 ATLAS DoE Site Review
UM ATLAS                        100
                           Network Leadership
           • Shawn McKee has taken a lead on network issues
             for US ATLAS:
              – US ATLAS Network project manager
              – HENP I2 working group co-chair
              – ESSC Networking Initiative member
              – LHC Technology Tracking Team Networking
                Working Group member
              – ICFA-SCIC subcommittee on monitoring
           • Submitted NSF ITR proposal to partially meet the
             needs of US ATLAS for networking research

            September 9, 2002                    ATLAS DoE Site Review
UM ATLAS                          101
                           Network Requirements
           There is more than a simple requirement of adequate
           network bandwidth for USATLAS. We need:
                –A set of local, regional, national and international networks
                able to interoperate transparently, without bottlenecks.
                –Application software that works together with the network to
                provide high throughput and bandwidth management.
                –A suite of high-level collaborative tools that will enable
                effective data analysis between internationally distributed
                collaborators.
           The ability of USATLAS to effectively participate at the LHC
           is closely tied to our underlying networking infrastructure!

             September 9, 2002                          ATLAS DoE Site Review
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           Existing and Planned Network Efforts
           • Survey of current/future     • Services (QoS, Multicast,
             network related efforts        Encryption, Security)
           • Determine and document       • Network configuration
             US ATLAS network               examples and
             requirements                   recommendations
           • Problem Isolation (Finger    • End-to-end
             pointing tools)                knowledgebase
           • Protocols (Achieving high    • Monitoring for both
             bandwidth and reliable         prediction and fault
             connections)                   detection
           • Network testbed              • Liaison to network related
             (implementation, Grid          efforts and funding
             testbed upgrades)              agencies
             September 9, 2002                        ATLAS DoE Site Review
UM ATLAS                            104
           Achieving High Performance Networking
           • Server and Client CPU, I/O and NIC throughput sufficient
              • Must consider firmware, hard disk interfaces, bus type/capacity
              • Knowledge base of hardware: performance, tuning issues, examples
           • TCP/IP stack configuration and tuning is Absolutely Required
                 • Large windows, multiple streams
           •    No Local infrastructure bottlenecks
                 • Gigabit Ethernet “clear path” between selected host pairs
                 • To 10 Gbps Ethernet by ~2003
           •    Careful Router/Switch configuration and monitoring
           •    Enough router “Horsepower” (CPUs, Buffer Size,
                Backplane BW)
           •    Packet Loss must be ~Zero (well below 0.1%)
                 • i.e. No “Commodity” networks
           •    End-to-end monitoring and tracking of performance
               September 9, 2002                            ATLAS DoE Site Review
UM ATLAS                               105
                  Iperf Network Test Setup




           September 9, 2002         ATLAS DoE Site Review
UM ATLAS                       106
               UM Network IPERF Results
      Server(MTU) Client(MTU) UDP(Mbps) TCP(Mbps)
      ATGRID(9000)             SPEEDY(1500)   737           469
      ATGRID(9000)             SPEEDY(9000)   710           977
      ATGRID(1500)             SPEEDY(1500)   92.5          64.2
      SPEEDY(1500)             ATGRID(9000)   922           618
      SPEEDY(9000)             ATGRID(9000)   784           990
      SPEEDY(1500)             ATGRID(1500)   55.3          50.3
           Our new switch has enabled us to increase our bandwidth to
           the edge of campus by a factor of 7-15 (Gig vs Campus)
           September 9, 2002                         ATLAS DoE Site Review
UM ATLAS                               107
                                 Summary
           • We were able to utilize almost the whole
             available bandwidth (~99%) with TCP with
             proper tuning and using large MTUs (9000 bytes)
           • The campus network, while physically limited to
             100 Mbps, varied in available BW between 55
             and 93 Mbps.
           • UDP was limited because of the number of
             interrupts required at 1 gigabit with a fixed MTU
             of 1434 bytes.

             September 9, 2002                   ATLAS DoE Site Review
UM ATLAS                          108
            Michigan Grid Testbed Layout




           September 9, 2002         ATLAS DoE Site Review
UM ATLAS                       109
             Grid Related Activities at UM
     • Network monitoring and • UM is now an
       testing (Iperf, Nagios,   “unsponsored” NSF
       Ganglia, Net-SNMP)        SURA Network
     • Security related tools    Middleware Initiative
       and configuration         Testbed site
     • MGRID initiative        • Authenticated QoS
                                 signaling and testing
     • MJPEG video boxes for
                                 (Demo at iGrid2002)
       videoconferencing
       (Demo at iGrid2002)

           September 9, 2002              ATLAS DoE Site Review
UM ATLAS                       111
                     Network/Grid Monitoring

           • Iperf: We have been working on automated network
             testing and monitoring using Iperf
               – Perl scripts have been used to run Iperf tests from LINAT01
                 (gatekeeper) to each other testbed sites gatekeeper using Globus.
               – We track UDP/TCP bandwidth, packet loss, jitter, buffer sizes for
                 each “direction” between each pair of sites.
               – http://atgrid.physics.lsa.umich.edu/~cricket/cricket/grapher.cgi
           • Nagios: Used to monitor hosts and service status. We have
             created install scripts for Nagios using PacMan.
               – https://atgrid.physics.lsa.umich.edu/nagios/ (User:guest, pw:guest)
           • Ganglia: A “meta-cluster” tool to monitor load and usage.
             We have created PacMan install caches for this as well.
               – http://atgrid.physics.lsa.umich.edu/umatlasgrid



             September 9, 2002                                     ATLAS DoE Site Review
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                               Ganglia




           September 9, 2002             ATLAS DoE Site Review
UM ATLAS                       113
                   Authenticated QoS Work
     • We have been working with CITI (Andy Adamson) at UM
       on issues related to QoS (Quality of Service)
     • This is a critical issue for grids and any applications which
       require certain levels of performance from the underlying
       network
     • A secure signaling protocol has been developed and
       tested…it is being moved into the GSI (Globus Security
       Infrastructure)
     • We had a successful demo between CERN and Michigan
       and are demonstrating again for iGrid 2002 (Sep 24-26)
     • We are writing a “white-paper” discussing how our work
       could benefit US ATLAS in security and QoS.

           September 9, 2002                         ATLAS DoE Site Review
UM ATLAS                           114
                                NMI Overview
           • New NSF Program - Anticipated (by the
             NSF) to be “the next NSFnet”
           • Initial funding of ~$12 million in 3-year
             awards in 3 categories: System Integrator,
             Service Provider, Application Developer
           • Program expected to grow substantially
             over time


            September 9, 2002                ATLAS DoE Site Review
UM ATLAS                            115
                               NMI Press Release




           September 9, 2002                  ATLAS DoE Site Review
UM ATLAS                             116
                        Michigan NMI Testbed
           Michigan has been selected as an “unsponsored” NMI
             testbed member.
               – Shawn McKee is technical lead, Victor Wong is admin. lead
           Goals are to:
           • Develop and release a first version of GRIDS and Middleware
             software
           • Develop security and directory architectures, mechanisms and best
             practices for campus integration
           • Put in place associated support and training mechanisms
           • Develop partnership agreements with external groups focused on
             adoption of software
           • Put in place a communication and outreach plan
           • Develop a community repository of NMI software and best practices

             September 9, 2002                               ATLAS DoE Site Review
UM ATLAS                                 117
                           NMI and US ATLAS
           • We hope to leverage our participation in NMI for
             US ATLAS
           • Numerous middleware components addressing an
             extensive range of grid and security functionality
             will be deployed and tested
           • Our group is uniquely positioned to allow us to
             work with the US ATLAS testbed, NMI and other
             related Michigan efforts to find the best set of
             middleware packages and features.

             September 9, 2002                   ATLAS DoE Site Review
UM ATLAS                          118
              ATLAS Collaboratory Project
                A U-M project to develop and use new
            collaboratory tools in support of training and
                 research in global scientific projects

           • Homer A. Neal (Physics), Jeremy Herr
             (Physics), Steven Goldfarb (Physics)
           • Charles Severance (UM Media Union)
           • Gisoué Vitaglione (Telecom Italia)


            September 9, 2002                  ATLAS DoE Site Review
UM ATLAS                        119
                      “Introduction to Athena”
            Athena is a key element of ATLAS software efforts.
            Massimo Marino (LBL) presented introductory workshop
             on Athena just before ATLAS week, 25 February 2002.
            Turned this into 7 short Web Presentations.
            Additional Athena training planned in coming year.




             September 9, 2002                     ATLAS DoE Site Review
UM ATLAS                           125
                               Future Directions
       Continued ATLAS software training in Athena,
        Globus, Grid software, etc. as need arises
       Improve software tools for capture and processing.
       Improve methods and hardware (Advanced
        Projection Station) for capturing presentations that
        use overhead transparencies, so that process “scales”
        to large parallel sessions.
       More refined evaluation of use and effectiveness of
        Web Presentations.
       Promote standard Lecture Object architecture…

           September 9, 2002                  ATLAS DoE Site Review
UM ATLAS                             126
           ATLAS Muon Offline Software
           Task Coordination and Development
                     Steven Goldfarb




UM ATLAS
           ATLAS Muon Offline Software
      • U.M. Responsibilities
           – Muon Database Task Leader (S. Goldfarb)
                • Two-Year Appointment (renewed 2001)
                • Organization and Planning of Development
           – ATLAS Reporting Lines
                • Muon software coordinator (J. Shank)
                • ATLAS database coordinator (D. Malon)
                • Computing PBS task 3.5.4
           – U. S. ATLAS Reporting Lines
                • Muon software contributions coordinator (S. Goldfarb)
                • Subdetector software contributions coordinator (J. Shank)
                • Computing WBS task 2.2.2.6

           September 9, 2002                                  ATLAS DoE Site Review
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           ATLAS Muon Offline Software
      • Major U.M. Contributions
           – Organization and Task Planning
                • http://cern.ch/muondoc/software/Database/
                • ATL-MUON-2000-009: The ATLAS Muon Database Task
           – Event Model
                • Access in Athena framework to simulated event data
                • Persistency: Zebra, Objectivity, ROOT
           – Detector Description Model
                • ATL-MUON-2001-015: Muon Detector Description Planning
                • Access in Athena to geometry and digitization data
                • Persistency: ASCII, Zebra, XML (AGDD)
           – Offline Identifiers
                • ATL-COM-MUON-2002-019: update 2.0

           September 9, 2002                                ATLAS DoE Site Review
UM ATLAS                                130
                ATLAS Muon Offline Software
      • Contribution Highlights
                 – ATLAS Detector Description
                          • Contributions to Architecture and Implementation
                                     Detector-Specific
                                    XML/C++ Interface

                                    Geometry Expanders




                    Generic
                  XML Description




            Graphics         Generic            Optimized      Other
           Applications    G4 Geometry         G4 Geometry   Applications


                 – Requirements and Technical Assessment Group
                          • Common projects for LHC Computing Grid Project
                          • S. Goldfarb representing ATLAS

                 September 9, 2002                                                ATLAS DoE Site Review
UM ATLAS                                                                    131
           ATLAS Muon Offline Software
      • Highlights
           – Muon Object-Oriented Reconstruction (Moore)




           September 9, 2002                ATLAS DoE Site Review
UM ATLAS                       132
           ATLAS Muon Offline Software
      • Current and Future Focus
           – Data Challenges (approved by ATLAS Executive Board)
                • Data Challenge 1 (Now)
                      – High-Level Trigger Technical Design Report (10 7 events)
                      – GEANT4, Grid Tool Tests, New Geometry and Event Models
                • Data Challenge 2 (2003)
                      – Tests of New Models (108 events)
                      – Physics Analysis with Grid Tools, Conditions Data Access
           – Test Beam Support
                • Muon H8 Test Beam (2003)
                      – Reconstruction in Athena
                      – Conditions Data Access


           September 9, 2002                                       ATLAS DoE Site Review
UM ATLAS                                    133
           ATLAS Muon Offline Software
      • Necessity of an Active U.M. Role
           – Simulation Feedback
                • Studies on staging, alignment, layout
           – Test Beam Analysis
                • Simulation of test beam layouts, analysis of data
           – Focus on U.S. ATLAS Program
                • Muon Chamber Construction
                • ATLAS Database
           – Underlying Motivations
                • U.M. Expertise in Software Development
                • Physics at Day One
           September 9, 2002                              ATLAS DoE Site Review
UM ATLAS                             134

				
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