1. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (1) - Yield, e/MeV with production crystals and production VPTs - Pre-calibration precision using VPT and crystal lab data - Detailed scan across 4 SCs: SC across to SC, across 4 SC meeting point - Comparison to Monte Carlo, constant term versus FNUF: lead shading of chamfers - Quantify level of white/coherent noise for 50cm read out lines - Laser monitoring - laser light in rear of xtal, signal with VPT instead of APD - Measure R for endcap crystals/endcap monitoring, especially ‘soft’ 2001 crystals - Data analysis - Complementary work to that of existing teams looking at barrel data E0’ test beam targets in 2003

2. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (2) E0’ Up to 4 Standard SCs Dee services and electronic integration issues Umbilical noise, optimal cable layout studies

3. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (3) E0’ SC01 being prepared for E0’Mounting SC01 to E0’ Fibres Umbilical

4. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (4) E0’ stages of build Backplate cooling NOTE OFFSET SLOTS in X Interim cooling plane Power cooling plane HV 8 cm moderator LV F.O bundle Umbilical

5. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (5) E0’ complete Accurate cross section through Dee All service planes incorporated 50 channel analogue readout box currently incorporated Noise studies to end 2002 SC01 SC02

6. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (6) E0’ http://hepwww.rl.ac.uk/CMSecal/E0prime.htm 904.00 800.00 780.17 Thermal screen

7. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (7) E0’ – current positional spacers 6,45,4 5,5 6,5 Spacer numbering Column, Row

8. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (8) E0’ – current positional spacers IP, beam Establish angles to beam needed for positioning plate on H4 turntable Angle (y-z plane) At top of array11.5 o At centre of array ~ tan -1 (60cm/320cm) 10.6 o At bottom of array 9.7 o

9. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (9) E0’ Supercrystals SC01 and SC02 not suited for test beam: high FNUFs, La doping (SC01), etc. Require 4 new SCs, 100 crystals Propose to use existing EE crystals with ACCOS FNUF ~<0.55% correction factor, ACCOS to Alveolar ~ -0.05 - -0.1 correction factor, lead shading of chamfers, ~ -0.1 should achieve all FNUFs ~<0.35-0.4 IC (D Britton) prepared to shade chamfer of higher FNUF crystals Measure FNUF before/after operation. Try to make SCs from same batch, all year 2000, or all year 2001 (rad soft) Will need crystals from next order of 100 EE crystals

10. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (10) E0’ crystals. Current EE Crystal Stock, FNUF < 0.57 TotalKnown whereabouts 100 R&D Year 2000 32 (5 in SC02) 22RAL 4 CERN Total available: 26 => 1 SC 100 Pre-production, 2001 74 (77 including bad RNUF/gradTT) (18 Ren Yuan) 15 Roma 3 ETH 13 UK 20 CERN, Bldg 27 Total available: 51 => 2 SCs Enough for 3 of 4 SCs

11. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (11) EE crystal inventory SC02 R&D EE crystals, year 2000, ACCOS, no FNUF corrections

12. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (12) EE crystal inventory Pre-production crystals, 2001, ACCOS, no FNUF corrections

13. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (13) E0’ lab setting up/readout issues Location: 867 or Meyrin site ? Light – to –light : how many ULR crates/stations ? Lasers : more than one or share with EB activities? MEM boxes : share ? Use single VPT test box/Stephenson preamp => camac to monitor laser into E0’? Status for charge injection ? Electron calibration in lab ?

14. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (14) E0’ Proposal: 1)Approve sending pre-production crystals to UK, FNUF<0.57 2)Approve 25-30 crystals for E0’ from order for 100 production crystals due to be launched shortly 3)Shipment of E0’ from RAL to 867 or Meyrin in Feb 2003 4)Fitting E0’ with ‘most useful/available’ light to light electronics, March – May, 2003

15. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (15) Appendix

16. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (16) FNUFs SC01 (La), SC02 FNUF >1.0 0.5<FNUF<1.0 FNUF<0.5 SC01 1998 La xtals SC02 from 100 R&D xtals in 2000 SC01 and SC02 intended for noise studies, not test beam

17. CMS ECAL End Cap WACH4, 28 Nov 2002 D Cockerill - RAL (17) SC01 FNUF values 27 La crystals, 1998 SC01