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Update on GEM-based DHCAL for SiD

Update on GEM-based DHCAL for SiD. Andy White For GEM/DHCAL Group September 21, 2005. Recent activities. We have received new 30cm x 30cm foils from 3M Corporation Some initial problems with surface – mositure trapped -> now cured HV (~400V) tests on all 12 strips/foil

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Update on GEM-based DHCAL for SiD

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  1. Update on GEM-based DHCAL for SiD Andy White For GEM/DHCAL Group September 21, 2005

  2. Recent activities • We have received new 30cm x 30cm foils from 3M Corporation • Some initial problems with surface – mositure trapped -> now cured • HV (~400V) tests on all 12 strips/foil • Now tooling up to build 5 30cm x 30cm chambers • Foils also being sent to 5 other institutions in U.S., Canada, China, Korea for evaluation. • 20 QPA02-based preamp cards made at Fermilab.

  3. Cosmic stack using Double GEM counters Fermilab beam chamber DGEM DGEM DGEM DGEM DGEM Fermilab beam chamber

  4. 305mm x 305mm layer Trace edge connector -> Fermilab 32 ch board Disc/DAQ under design by U.W. (10 x 10) – 4 active area = 96 channels

  5. 3M GEM foil design HV tabs to be longer

  6. First 30cm x 30cm 3M GEM foils

  7. First 30cm x 30cm 3M GEM foils

  8. Section of 30cm x 30cm 3M GEM Foil

  9. A piece of fiber inside the hole on uncoated GEM

  10. A piece of fiber inside the hole on uncoated GEM

  11. Tooling for mounting GEM foils on G10 frames

  12. G10 Frame 30cm x 30cm

  13. G10 Frame 30cm x 30cm

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