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Dee Calibration for High-Energy Electron Detection in Test Beam Facility

Proposal to calibrate Dee for electron detection in high-energy test beam using existing infrastructure. Addressing challenges for optimum EE and ES benefits. Detailed plan by D. Cockerill, RAL.

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Dee Calibration for High-Energy Electron Detection in Test Beam Facility

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  1. Dee in testbeam Proposal P Bloch, C Seez, Y Sirois Dee calibration in test beam Last period of 2006, November Heavy ions, so highest electron energies~ 100 GeV Challenge To use existing H4 infrastructure Goal Get maximum benefit for EE (and ES?) D Cockerill, RAL, 8 June 2005

  2. 4x5 SC arrayfor the test beamin Nov 2006 Dee Calibration Nov 2006 D Cockerill, RAL, 8 June 2005

  3. VPT sorting by SC position Old data Mean ~33 e/MeV now D Cockerill, RAL, 8 June 2005

  4. =2.5 =1.57 TT26 TT19 SC region on Dee Backplate angle as for beam from CMS I.P. D Cockerill, RAL, 8 June 2005

  5. Appropriate any five trigger mapping DCCboundary TCCboundary ‘Any 5’ trigger map D Cockerill, RAL, 8 June 2005

  6. Problem of OPAL frames Dee frame is an enormous device 3,6 tonnes in weight Will exceed EB turntable weight limit Use it only to transfer Dee to H4, if at all Dee backplate ~ 1.9 tonne with crystals Mount Dee on plinth on the H4 turntable Dee backplate angled to beam with appropriate support struts Need FEA to check Dee rigidity D Cockerill, RAL, 8 June 2005

  7. Special H4environmental screen Beam Avoid vertical movementscrew This part of Dee empty, No weight Avoid pivot support Dee on H4 turntable D Cockerill, RAL, 8 June 2005

  8. H4 turntable constraints Benefits of the proposed siting of Dee on turntable Vertical rotation - in 2004, SCs moved in an arc – difficult to follow - 2005 scheme SCs move ~vertically - unfortunately radius of rotation only ~ 1m Horizontal rotation - in 2004 adjacent SCs were not horizontal after rotations in the vertical - 2005 scheme, a better x-y grid of xtal positions for data taking/analysis D Cockerill, RAL, 8 June 2005

  9. Dee patch panel H4 control room Short fanout trunk cable MPO MPO Readout needed for 20 SCs 100 trigger GOH 20 data GOH Short fanouts on Dee FE – DCC 20 optical lines = 2 short fanouts (24 lines) FE – TCC 100 optical lines = 9 short fanouts (108 lines) MEM 24 optical lines = 2 short fanouts Totals 144 optical lines 13+1 = 14 short fanouts MPO trunk cables from Dee to H4 CR (barrel had MFS trunk cables at SM10 end) 2 trunk cables 2*96 = 192 lines +1 trunk cable for CCS/token rings/MEM D Cockerill, RAL, 8 June 2005

  10. UK opportunities Monte Carlo appraisal Comparison – testbeam to Monte Carlo Identify particular regions needing close study Use current geometry in OSCAR or update to XML? Way in to EE/ES reconstruction algorithms – urgently needed – no one doing this! Assembly of 20 SCs VPT database Bare SC assembly Pre-production HV cards Pre-production umbilicals Trigger mapping and checking HV system Final HV system + fanout HV box All software drivers completed VPT stability LEDs At least one system required EE test beam/analysis Opportunities for the UK to take leading roles……… D Cockerill, RAL, 8 June 2005

  11. Additional info D Cockerill, RAL, 8 June 2005

  12. Noise across Dee Transverse noise across Dee, VPTs sorted ET from 30 – 60 MeV (old normalisation) D Cockerill, RAL, 8 June 2005

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