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AGATA ancillary detectors and ancillary detector integration group

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					                AGATA
   The Advanced Gamma Ray Tracking Array
Ancillary Detector and Integration W.G.

Status of the Working Group and Tasks

                 A.Gadea
     Ancillary Detector and Integration W.G.

•Purpose: coordination of the use and integration of
ancillary devices in AGATA.
                   Demonstrator phase:
•Identification of existing ancillary devices necessary
to demonstrate the feasibility of using a tracking array
in different experimental conditions.
•Construction of the necessary electronics to
guarantee the correct coupling of the ancillary and
AGATA Demonstrator electronics.
•Coordinate the ancillary devices mechanical
integration
•Evaluate the impact of the ancillary detector in the
AGATA performance.
     Ancillary Detector and Integration W.G.
                      TASKS

•Ancillary detectors for the “key” experiments and
 AGATA demonstrator tests. (N.Redon)

•Electronics and data acquisition integration.
 (Ch.Theisen)

•Ancillary detector impact on the AGATA
performances. (No chairman)

•Mechanic integration of ancillary detectors in
 AGATA. (No chairman)
     Ancillary Detector and Integration W.G.
               MEETINGS OF THE W.G.
•Start meeting: May 16th-17th 2003
    •Definition of tasks
•AGATA Week : September 15th-19th 2003
    •First concepts of integration of the electronics
    •Impact of ancillary devices on AGATA
•W.G. Meeting: June 22th 2004
    •Interaction with the AGATA GTS (latency!)
    •Ancillary devices for the Demonstrator phase
•Electronics and data acquisition TASK meeting:
 17th November 2004
    •Starting the specifications for an ancillary
    electronics GTS interface.
        Ancillary Detector and Integration W.G.
               TASK: STATUS AND LINKS

     Ancillary detectors for the “key” experiments.
                       (N.Redon).

•Link with DATA ANALYSIS W.G.: Key experiments task
•Identification of Facilities and ancillary instruments to
 prove the AGATA Demonstrator.
•Document on demonstration scheduling, done in
 collaboration with the key experiments task, will be
 available soon .

Meeting Wednesday 14:00 (N.Redon/E.Farnea)
      Scheduling for the AGATA modules and
               Demonstrator tests
• Test of symmetric capsules 2004-2005
• In beam test of the symmetric cluster ~June 2005?
  (if ~108 sampling ADC channels are available)
• Test in different labs of the symmetric and asymmetric
  capsules 2005-2006
• Demonstration campaigns: Starting at end 2006-
  early 2007

      •   Debugging the full/partial Demonstrator
      •   Low v/c (<0.1) beam demonstration campaign
      •   Medium v/c (≤0.3) beam demonstration campaign
      •   High v/c (>0.3) beam demonstration campaign
      •   Radioactive beams test (background conditions)
      •   Tagging demonstration campaign
    Proposed Demonstration sites
    •   GSI: Demonstrator at FRS
    •   LNL: Demonstrator +PRISMA
    •   GANIL: Demonstrator +VAMOS (and may be with SPEG)
    •   JYFL: Demonstrator +RITU
    •   IKP KÖLN: Demonstrator + ancillaries

    and devices
•   LUSIA: Lund Si-strip detectors
•   Recoil filter detector (RFD)
•   Neutron Wall
•   The CUP detector
       Ancillary Detector and Integration W.G.
              TASK: STATUS AND LINKS

     Electronics and data acquisition integration .
                     (Ch.Theisen)

•Link with Data Processing W.G.: GTS task and DAQ
 task.
•Document on specification of the Ancillary GTS
 interface (draft) distributed
•Team engineers from: Krakow, GANIL, Daresbury,
 Padova, … working on the specifications and
 electronic design
Technical Ancillary-GTS Meeting Tuesday 14:00
                  (Ch.Theisen)
          VME GTS Interface: schematic block diagram



    Optical Fibre                  GTS
    Control bus                  Mezzanine




    Front                                             VME
  pannel I/O                       FPGA               Back-
                                                      plane
(Trigger input etc…)


                                  Memory


                       “standard” + TDR interfacing
                Specifications:
•   Backward compatibility with VME/VXI based ADC
    and readout fornt ends

•   Full compatibility with the AGATA GTS mezzanine

•   It will work with the Trigger-request / Trigger
    acceptance protocol

•   Will provide the interfacing with TDR systems
    (required for tagging setups)
        Ancillary Detector and Integration W.G.
               TASK: STATUS AND LINKS

Ancillary detector impact on AGATA performances. (No
                       chairman)

•Link with DATA ANALYSIS W.G.: simulation of Key
 experiments task
•Impact of the different ancillary instrument into the
 AGATA performances (only done for few cases).

 See contribution of E.Farnea on Wednesday
morning: simulation of the impact of EUCLIDES
        Ancillary Detector and Integration W.G.
              TASK: STATUS AND LINKS

   Mechanical integration of ancillary detectors and
               devices . (No chairman)

•Link with Infrastructure W.G.

•Coordination required due to the start of the test
 campaigns.
•Integration of ancillaries in early pre-Demonstrator
 campaigns.
            Experimental activity proposal
       key-experiments & ancillary devices teams
•   Binary Reactions (Coulomb excitation, quasi-elastic reactions, etc...)
     – Feasibility of tracking with Doppler corrections for v/c < 0.1
     – Large scattering angle for the products
     – Reconstruction of low multiplicity "simple" spectra.

•   Reactions close to the Coulomb barrier (Fusion-Evaporation reactions / Deep Inelastic
    Collisions)
     – Tracking with ~0 degree recoils (Fusion-Evaporation reactions).
     – Tracking with high multiplicity and large scattering angle for the products (Deep
        Inelastic)
     – High spin, reconstruction of high multiplicity spectra.

•   GDR and high energy gamma detection (Fusion-evaporation at the limits of angular
    momentum).
     – Tracking efficiency for high energy gammas
     – Explore the reconstruction on non-Compton processes (pair production)

•   Medium and high v/c reactions with stable (knock-out, fragmentation and relativistic
    Coulomb excitation)
     – Feasibility of tracking with Doppler corrections for v/c >> 0.1
     – Low gamma multiplicity at large v/c (Coulomb excitation or knock-out)
     – Large gamma multiplicity at large v/c (fragmentation)
          Experimental activity proposal
     key-experiments & ancillary devices teams
•   High intensity stable beams (tracking at extreme counting rates)
     – Low multiplicity (Coulomb excitation, quasi-elestic collisions etc...)
     – High multiplicity (Fusion-Evaporation reactions / Deep Inelastic Collisions)
     – Proton-rich nuclides, medium spin, v/c=0, (tracking with a compact array)

•   RIB Close to the coulomb barrier
     – Define the sensitivity limits of the array
     – Explore the behaviour of the array under high radioactive background
        conditions
     – Check the techniques for background reduction

•   Low, medium and high v/c reactions with RIB's
     – Define the sensitivity limits of the array
     – Explore the behaviour of the array under high beam background conditions
     – Check the high energy hadronic background effects

 b-decay and isomer decay studies.
     –   Effects of the de-localized annihilation of the positron (b+ decay).
     –   Effects of a large area gamma source.
       Low Energy reaction mechanisms

•Coulomb excitation (Coulex) and Inelastic scattering.
•Transfer and quasi-elastic processes.
•Multi-nucleon transfer.
•Deep Inelastic Collisions.
•Quasi-fusion reactions.
•Fusion – evaporation.
•Fusion-fission.
      High energy reaction mechanisms


Relativistic (single step)
Coulomb excitation
Knockout reactions
Fragmentation reactions
                                     Knockout reaction

        Cross sections :
        - up to1 barn for Coulex (large Z nuclei)
        - tens of mbarn for 1 nucleon knockout,
        - down to few mb for 2 nucleons knockout.

				
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