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					     US LHC Accelerator Research Program
                     bnl - fnal- lbnl - slac


   Closing Plenary Session
Commissioning and Accelerator
           Physics
             M. Syphers/FNAL
             21 October 2004
             Napa, California
                                Tuesday PM -- Agenda
                  Napa, CA 19-21 Oct 2004Tuesday 19 Oct 04

                  Commissioning and Accelerator Physics

                  1:30 Greeting & Session Overview
                             - M. Syphers [10m]
                  1:40 LHC Commissioning Plans and Status
                             - R. Bailey [60m]
                  2:40 LARP Magnet Commissioning Issues and Plan
                             - M. Lamm / R. Saban [45m]
                  3:25 Comments and Discussion on LARP Beam and Non-Beam Commissioning
                             - E. Harms [20m]

                  3:45                  Break [15m]

                  4:00 Wire Compensation Report
                            - T. Sen [30m]
                  4:30 Report on Electron Cloud Activities
                            - M. Furman [30m]
                  5:00 Possible Loops for Global Decoupling
                            - Y. Luo [30m]
                  5:30 General Discussion

21 October 2004                          Closing Plenary APC - M. Syphers/FNAL           2
                        Summaries
First, report on accelerator physics …

… then, commissioning




21 October 2004           Closing Plenary APC - M. Syphers/FNAL   3
                    SPS wire compensation


                                                    Emittance shaving
                                                           occurs early




Intensity Loss
compensated by 2nd wire


 Reported: T. Sen


21 October 2004        Closing Plenary APC - M. Syphers/FNAL              4
                     SPS experiment – tune scan


                                     tune scan with compensation
                                     of 2 BBLRs in the CERN SPS
                                     near the LHC working point


                                                                                  30.07.04
                                                          no BBLR
path in the tune diagram


                                                                   compensation

   F. Zimmermann                                             1 BBLR
     via T. Sen
                                                                          nearly perfect
                                                      ?                   compensation
21 October 2004            Closing Plenary APC - M. Syphers/FNAL                           5
                              Wire compensation proposal

                     Wire Compenstion Proposal
1)     Experimental demonstration of the principle in the SPS with one wire
       simulating the beam and the second as the compensator
2) Experimental demonstration in a hadron collider (RHIC or
   Tevatron) or lepton collider (e.g. PEP-II) - demonstrate use of the
       wire for the benefit of this collider, e.g, as scraper, or for future upgrades.
      RHIC - compensation of long-range collisions in eRHIC or after IR
       upgrades
       Tevatron - improving performance of Run-II / BTeV


3)     R&D on pulsed wire compensation system; possible test of pulsed wire on
       beam in existing machine
4)      Design of compensation device for LHC assuming success of former points.



21 October 2004                  Closing Plenary APC - M. Syphers/FNAL                   6
                                 eCloud (M. Furman)
                  Developments since FNAL LARP mtg. (June 2004)

Participation in SPS EC runs (June 21-26, 2004)
     CERN: Arduini, Jiménez, Baglin, Schulte; LARP: Iriso, Pivi, Furman
     initial results: LHC-MAC mtg. #14 (Jul. 12-13, 2004)
     ongoing analysis of results (US and CERN)
more RHIC results
     Hseuh, Iriso, Zhang
     initial results: Workshop on RHIC experiments (Sep. 16-17, 2004)
M. Jiménez visited BNL (late Sept. 2004)
     formal proposal for e-detectors in RHIC
Iriso to leave BNL April 05
We’ll participate in the CARE HHH-2004 wkshp. (CERN, Nov. 8-11, 2004)
ECLOUD04 proceedings almost done!
…


21 October 2004              Closing Plenary APC - M. Syphers/FNAL        7
                  Electron Cloud -- Summary (M. Furman)

Continue and increase SPS analysis via simulations
     plan to hire an UG student 1/2 time for this (soon, I hope)
     code benchmarking as part of the process (LARP-CARE collab.)
Iriso-Peggs map technique: needs continuity after UI leaves
     who?
Hopefully RHIC will not fully suppress the e-cloud with coated
    chambers!
     we need an e-cloud in the warm regions for better testing our
        simulations
     make sure we reach the point of installing the cold SD in RHIC
I feel a lack of “critical mass” in the e-cloud effort
     leads to infrequent communication with CERN people
     it’s a nontrivial effort to keep up with CERN’s and other’s activities
     maybe it’s a temporary state…

21 October 2004             Closing Plenary APC - M. Syphers/FNAL             8
                  Global Decoupling Loops -- (Y. Luo)



                                                                  Scan
                                                                  (modulate)
                                                                  circuit
                                                                  strengths,
                                                                  look for
                                                                  direction of
                                                                  phase
                                                                  difference
                                                                  changes to
                                                                  see where to
                                                                  set skew
                                                                  quads
21 October 2004           Closing Plenary APC - M. Syphers/FNAL             9
                       Luo (cont’d)




21 October 2004   Closing Plenary APC - M. Syphers/FNAL   10
                         Commissioning


 Report on LHC commissioning plans and process -- Bailey

 Report on LARP IR hardware commissioning -- Lamm
      and, on general LHC hardware commissioning -- Saban

 Discussion of LARP involvement in beam commissioning, as well as
  non-beam commissioning -- Harms




21 October 2004         Closing Plenary APC - M. Syphers/FNAL   11
                                            Machine checkout April
                                                                 May
                                         Beam commissioning June
                                                                 July
                                                Pilot proton run August
                                               First TOTEM run September
                                                   First ION run October




21 October 2004
                                                                 November
                                                                 December
                                                      Shutdown
                                                                 January
                                                                 February
                                            Machine checkout March
                                          75ns commissioning April
                                                                 May
                                                        75ns run June
                                                                 July
                                                                 August
                                        Low intensity 25ns run September
                                                                 October
                                                                 November
                                                                 December
                                                      Shutdown
                                                                 January
                                                                 February
                                            Machine checkout March
                                        Startup and scrubbing April
                                                                 May
                                                                 June
                                        Half intensity 25ns run
                                                                 July
                                                                 August
                                                                 September
                                                                 October
                                                                 November
                                                      Shutdown
                                                                 December
                                                                 January
                                                                 February
                                            Machine checkout March




Closing Plenary APC - M. Syphers/FNAL
                                        Startup and scrubbing April
                                                                 May
                                                                 June
                                                                 July
                                         Push to nominal 25ns
                                                                                                                              Commissioning (R. Bailey)




                                                                 August
                                                                 September
                                                                 October
                                                                 November
                                                                 December
                                                      Shutdown
                                                                 January
                                                                 February
                                            Machine checkout March
                                                                             First 4 or 5 years will be something like this




                                        Startup and scrubbing April
                                                                 May
                                                                 June
                                                                 July
                                                  Nominal 25ns
                                                                 August
12




                                                                 September
                                                                 October
                                                                 November
                                                                 December
                  We will need for normal operation (year 3+)




Machine supervisor        weekly responsibility                     need 4
EIC                       on shift                                  need 7
Operator                  on shift                                  need 7
Cryogenics operator       on shift                                  need 7



Accelerator Systems support
Accelerator Physics support


                                                                             R. Bailey

21 October 2004             Closing Plenary APC - M. Syphers/FNAL                 13
                         Commissioning scenario


LHC Commissioning Coordinator
  weekly responsibility for year 1, maybe year 2

Shift workers
   CIC (on shift for year 1, maybe year 2)
   EIC for the future (on shift long term)
   Operator (on shift long term)
   Hardware commissioning veteran (year 1)

Accelerator Systems Responsibilities

Accelerator Physics Responsibilities
                                                                  R. Bailey

21 October 2004           Closing Plenary APC - M. Syphers/FNAL        14
                  Accelerator Systems Responsibilities


All accelerator systems will need to be commissioned, first during
   hardware commissioning and later with beam. Once a system has been
   made to run, it will need frequent expert support to make it continue to
   work.

While responsibility for the performance of any accelerator system rests
 clearly with the group(s) concerned, it would prove extremely useful to
 have personnel directly concerned with machine operation also
 involved. This would result in a number of mini-teams responsible for
 the exploitation of particular accelerator systems.



                                                                   R. Bailey

21 October 2004            Closing Plenary APC - M. Syphers/FNAL        15
                  Accelerator Physics Responsibilities



We will need a pool of accelerator physicists ready to push through
 particular phases of the commissioning program and to pick up on the
 inevitable surprises that will crop up along the way. Qualifications are
 very similar to those of the CIC. Although not shift work, must be
 committed to doing this until the LHC operation becomes routine.

We will also need accelerator physicists responsible for specific aspects,
 or ‘beam-based systems’. This could be done in the style of mini-
 teams responsible for particular systems.




                                                                   R. Bailey

21 October 2004            Closing Plenary APC - M. Syphers/FNAL        16
                                Bailey, cont’d

LARP Involvement:

In the present US-LARP proposal, resources are allocated for “Beam
   Commissioning and Accelerator Physics” activities from 2004
   onwards, rising to significant numbers by 2007. In the discussions to
   date, we have made the point that the US-LARP commitment has to
   be made with long-term individual commitments of around 12
   months, and that US staff should come to perform a specific role in
   the beam commissioning work. It has also been clearly said that
   CERN has to maintain sufficient expertise, particularly on shift, to
   ensure long-term exploitation of the machine.

 With this in mind, we feel that a very limited number of US-LARP resources
 could participate in the shift rota. Rather, they would be best suited to the
 accelerator physics and equipment group support activities listed above.


21 October 2004              Closing Plenary APC - M. Syphers/FNAL               17
                                         System                                                                AP   OP   LARP / other

                                         Beam in the injectors

                                         SPS extraction, transfer, injection and first turn

                                         Multi turn losses and BIS dependability

                                         Clean Beam Extraction
Need to begin to fill out these lists…

                                         Filling efficiency and flat bottom conditions
   One of several lists, both HW




                                         Ramp and squeeze quality

                                         Longitudinal plane
          systems and AP




                                         Optics

                                         Aperture

                                         Field quality

                                         Lifetimes

                                         Separation schemes

                                         Crossing angle schemes

                                         Collisions and luminosity

                                         Experimental conditions

                                         Ions

    21 October 2004                                                    Closing Plenary APC - M. Syphers/FNAL              18
             LARP Hardware Commissioning Conclusions

HC is an important way for the US to contribute to the LHC project

Inner triplet HC contribution is established
Recent new requests in global commissioning could greatly expand our role

We have presented our best estimate of required costs for HC of inner triplet based on CERN
schedule

Plan for success (i.e funding and participation is minimal and without contingency)
Does not include cost of participation in global HC

Taking responsibilities in Inner Triplet Region (an area in which the US has a large and unique
expertise) will help in the global HC (free up CERN personnel, LARP IR personnel can take
on global jobs).

Major uncertainties:
Uncertainty in CERN schedule
Cost of living in Geneva (addressed at LAPAC)
Lining up the appropriate people at the right time                            M. Lamm

21 October 2004                   Closing Plenary APC - M. Syphers/FNAL                 19
                            Commissioning -- Saban


Summary from talk:
        getting ready for the commissioning in general and the IT region in particular
        we need experts who will be active in the field
              with experience
              people in the tunnel getting their hands dirty
              to be deployed on hardware commissioning
              most critical need in electrical engineering, quench protection, machine
                   interlocks
              we don’t encourage short term (<6 months)
              integrated in the equipment groups commissioning the hardware
        discussions are needed to finalize
              procedures,
              mission at CERN,
              roadmap in general, …



 21 October 2004                  Closing Plenary APC - M. Syphers/FNAL              20
                       Commissioning (E. Harms)


                      Projected LARP Participation in
                          Beam Commissioning

                  6
                  5
                  4
                  3
                  2
                  1
                  0
                      FY04    FY05         FY06         FY07         FY08

                                        Total FTE's
•0.1 FTE in 2005
•0.6 FTE in 2006
•5-6 FTE in 2007 and beyond

21 October 2004              Closing Plenary APC - M. Syphers/FNAL          21
                  Commissioning (E. Harms)


• Is planned level of participation (budget) in 2005-2006
  sufficient to ramp up efficiently for beam commissioning in
  succeeding years? (LAPAC voiced same concern in July)
• Names? Contact person(s) at collaborating laboratories.
• What role(s) should U.S. Scientists play at CERN?
• Length of visits?
• Is manpower available to assist in LHC checkout, etc.
• ?




21 October 2004       Closing Plenary APC - M. Syphers/FNAL   22
                  Commissioning -- Summary of Summaries

o Agree that AP/HW support efforts more feasible and more realistic rather than
  providing shift leaders, for example

o Note: ‘support’ is very much Front Line, and essential

o Need to start identifying people now
                            NAMES -- NAMES -- NAMES !!

    begin to fill up Roger’s chart(s)
     –    R. Bailey to meet with CERN departments, give presentation soon
     –    E. Harms to CERN 4-9 November for TI8 test; will meet with Bailey
     –    S. Peggs / M. Syphers / E. Harms will start polling people @ all labs
                     -- availability
                     -- expertise
                     -- etc. …


21 October 2004               Closing Plenary APC - M. Syphers/FNAL           23

				
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