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WP1: Detector Assembly Liverpool

WP1: Detector Assembly Liverpool. Tasks: Detector specification measurement Assembly of components in progress Detector assembly for scanning Work in progress Triple-cryostat assembly Preparation in progress. Detector specification measurement. Dedicated testing system

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WP1: Detector Assembly Liverpool

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  1. WP1: Detector AssemblyLiverpool • Tasks: • Detector specification measurement • Assembly of components in progress • Detector assembly for scanning • Work in progress • Triple-cryostat assembly • Preparation in progress

  2. Detector specification measurement • Dedicated testing system • Canberra equipment delivered • New single test cryostat • procure component parts • Updated firmware for 40 Gretina digitiser channels.

  3. Detector assembly for scanning • The AGATA asymmetric detector C001 has been re-assembled and tested, prior to scanning (WP2) in the laboratory.

  4. Detector assembly for scanning • H. Boston, C. Unsworth trained in Cologne • Subsequently trained M. Norman and S. Moon • Preamplifier test box shipped to Liverpool • Delays in reassembly due to internal wiring troubleshooting and slow pumping system • Flaky internal wiring (test cryostat) – possible Kapton cabling • Cross talk data collected and analysed with Gretina cards • Energy resolution verified with analogue electronics

  5. Triple-cryostat assembly • New pumping system due for delivery • System will then be commissioned

  6. WP1 : Next 6 months • C001 repaired and commissioned, being scanned • Detector acceptance system will be commissioned • Liverpool to be agreed as a detector acceptance site • Procure cryostat component parts • Appoint Liverpool technician • Next detector for scanning to be commissioned.

  7. WP1: Milestones

  8. WP2: Interaction position determination using pulse shape analysisManchester, Liverpool, Surrey • Tasks: • Detector Characterisation • C001 detector scan • MGS 3D Simulation code comparison with expt. • Work in progress • Pulse Shape Analysis (PSA) development • Work has started

  9. WP 2 report General Comments: • S. Moon and A. Robinson started as PDRAs • PSA team meetings • AGATA week in Cologne (30 March) • Legnaro (21-22 May 09) • Bi-weekly telephone meetings

  10. Detector Characterisation • Offset of the horizontal segmentation line in rings 2 and 3, due to the electron and hole drift profile being influenced by the fast/slow axis orientations. • The scan of detector C001 revealed a 12° offset toward segment B from that specified by the AGATA collaboration. • Implication need to characterise to determine true axis orientation

  11. Detector Characterisation • Singles scan C001 • Output: 2 IEEE TNS papers, 1 NIM paper, 2 APS conference proceedings.

  12. Detector Characterisation • Development of improved performance scanning methodology. • Full scan presently 2 months • The Pulse Shape Comparison (PSC) Scan method [F.C.L. Crespi, NIM A, April 08] • Chi-squared minimisation of pulses shapes recorded from two collimated beams injected at 90 degrees to each other in sequential measurements. • This process requires only a singles scan and therefore would in principle allow a detector to be characterised in a fraction of the time.

  13. Detector Characterisation • Coincidence scan C001 delayed due to cooling problem requiring FET replacements. • Detector now being scanned (WP1)

  14. MGS 3D Simulation code comparison • Basis data set optimised for symmetric detectors.

  15. MGS 3D Simulation code comparison • Majority of difference can be accounted for by differential cross-talk correction.

  16. MGS 3D Simulation code comparison

  17. MGS 3D Simulation code comparison • Theoretical E-field calculations for three asymmetric AGATA detector shapes have been performed using MGS.

  18. MGS 3D Simulation code comparison • Reasonable good agreement (symmetric crystals) • Axis orientation issue • MGS grid issue (missing points) • First triple basis data set (asymmetric crystals) delivered to LNL for in-beam tests • Performance is promising

  19. PSA development • Storage devices purchased for basis data sets. • Relevant meetings attended • Personnel up to speed • Infrastructure for algorithm optimisation • Basis data set distribution

  20. WP2 : Next 6 months • Detector Characterisation • Complete C001 detector scan • Validate PSC method • Root conversion program available • Compton reconstruction • Mount next detector • MGS 3D Simulation code comparison with expt. • Implement differential cross talk correction • Compare MGS/JASS performance • PSA development • Complete analysis platform commissioning • Optimise PSA codes

  21. WP2: Milestones

  22. Tasks • Implementation of the experimental facilities into GEANT • Ongoing, first stage complete • Simulation of key experiments • Ongoing, some source simulations done • Verification of tracking algorithms • Started WP3 : Simulation and trackingYork, UWS, Manchester, STFC Daresbury

  23. Implementation of the experimental facilities into GEANT • Geant4 code has been successfully installed with the existing experimental facilities. • Some more need to be implemented during the next few months.

  24. Packages • GEANT4 AGATA code (E. Farnea) • A tracking code: • 2 availables: • mgt code (D. Bazzacco) • oft code (A. Lopez-Martens) • An analysis package: xtrackn, ROOT based programs (GammaWare) • GammaWare (O. Stezowki) • Convert files.ags from the Radware/ENSDF level scheme directory to simulation input file • Production cross section codes • Ex: Fusion evaporation (CASCADE, COMPA )

  25. Status & near future plans • A UK AGATA WG is being formed (mailing list, regular meetings) • Obtain, install and learn how to use the AGATA simulation • Get the packages running • GEANT4 AGATA code () • tracking codes () • GammaWare () • Cross section codes (to get) • Reproduce the simulation results previously reported (on going) • Simulate source runs and compare with data • 137Cs or 60Co • Simulate first in-beam test and compare with data

  26. Basic tests of codes and validation 1p 2p 3p 4p The Geant4 code has been tested to generate various geometries of AGATA array.

  27. Basic tests of codes and validation Geant4 simulation 60Co source P/T = 62% Efficiency=33% OrsayTracking code Padova Tracking code P/T = 63% Efficiency=37% The P/T are almost same for both the codes. Efficiencies are different. (Clustering mechanism are different in ORSAY code)

  28. WP3: Milestones

  29. WP4 Support for setup and running of initial experiments UWS, Liverpool, Manchester, Surrey, York, STFC Daresbury • Tasks • Installation of AGATA detectors at Legnaro National Laboratory • Ongoing, first detector installed • Running of the test experiments with sources and in-beam • Ongoing, source and some in-beam test done • Use the output of WP2 to optimise the analysis • Future task

  30. Stages in set up and commissioning Stage 0 Test of a triple cluster with a radioactive sourceStage 1 In-beam test of a triple cluster Stage 2 In-beam test of a triple cluster with a simple ancillary detector Stage 3 In-beam test of three triple clusters Stage 4 In-beam test of triple clusters with the PRISMA spectrometer

  31. Stage 0: Radioactive sources test • To test data-acquisition system, front-end electronics, mechanical support etc. • Week 8 (16th – 20th February 2009)

  32. Stage 1: First in-beam test • To test system in real experimental conditions, measure overall position resolution etc. • Week 12 (16th – 20th March 2009) • 30Si at 70 MeV on thin 12C target (with and without stopper downstream of target) • One asymmetric cluster at θ=90○ • Inverse kinematics – high recoil velocity • Different target to detector distances to determine position resolution

  33. PRISMA spectrometer Mechanical Support Frame AGATA detector at Legnaro

  34. WP4: Next 6 months • Further commissioning experiments • Stage 2 July 2009 • AGATA module with an ancillary detector • Stage 3 Later in 2009 • Increase number of AGATA modules to three

  35. WP4: Milestones

  36. WP5 Electronics and software STFC Daresbury, Liverpool • Tasks • Support installation at Legnaro • Ongoing • Digitiser electronics for the next period (inc upgrade) • Preparation work started

  37. Support installation at Legnaro • Digitiser work for demonstrator • Firmware upgrade done to shut down automatically if temperature reaches 40C (previously relied on software) • Delivery status: * Out of these 11 digitisers, 3 are in Turkey, 3 are in France, 5 in UK

  38. Support installation at Legnaro • Pre-processing work for demonstrator • Management of team only; no hardware or firmware work except advice/consultancy as required. • Video conference every 2 weeks + AGATA week team meeting face to face.

  39. Support installation at Legnaro • Slow control and GUI work for demonstrator • Recent decision by the team to adopt Vic Pucknell’s (UK) software philosophy for Digitser control as the standard for all AGATA front end electronics control • Commands sent to hardware known as “Vic Orders” • Vic Pucknell has written example code against which to test application code written by others.

  40. Digitiser electronics for the next period • Digitiser work • Collaboration has decided to build 6 digitisers of the current design for the end 2010. Four will be from the UK grant. Agreed with AGATA collaboration. • Discussions have started to determine what upgrades are needed for the next batch of digitisers (replacement of obsolete parts for example). Expected to take several months.

  41. WP5 : next 6 months • Continue to support installation at Legnaro as required • Start to build and test 6 more digitisers to existing design • Continue discussion on digitiser proposal with rest of collaboration • Start work on specification of new digitiser electronics

  42. WP5: Milestones

  43. WP6: Mechanical DesignSTFC Daresbury, Liverpool • Tasks: • Support for AGATA at Legnaro • Investigation of mechanical problems • Installation of detectors • Several visit to Legnaro needed • Design of new support structures • Awaiting collaboration decision

  44. Installation of detectors at Legnaro Setting the Detector Detector still doesn’t come down square in jig, but the situation is much improved

  45. Installation of detectors at Legnaro Measuring the Setting Fixture Support jig measured with tracker. Results to be compiled

  46. Installation of detectors at Legnaro Detectors within specification when installed. Report to be written

  47. WP6: Next 6 months • Determine the source of the deflections using Finite Element Analysis. • Modify necessary components. • Start design of new support frame once the decision on the location of the next host laboratory has been taken.

  48. WP6: Milestones

  49. WP7: Project ManagementLiverpool and STFC Daresbury • Tasks: • Establish UK management structure • In place and working • Contribute to AGATA international mangement • ongoing

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