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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 - PowerPoint PPT Presentation
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Update on GEM-based DHCAL
for SiD
Andy White
For GEM/DHCAL Group
September 21, 2005
- 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.
Recent activities
Fermilab beam chamber
Fermilab beam chamber
DGEM
DGEM
DGEM
DGEM
DGEM
Cosmic stack using Double GEM counters
(10 x 10) – 4 active area = 96 channels
Trace edge connector -> Fermilab 32 ch board
305mm x 305mm layer
Disc/DAQ under design by U.W.
3M GEM foil design
HV tabs to be longer
First 30cm x 30cm 3M GEM foils
First 30cm x 30cm 3M GEM foils
Section of 30cm x 30cm 3M GEM Foil
A piece of fiber inside the hole on uncoated GEM
A piece of fiber inside the hole on uncoated GEM
Tooling for mounting GEM foils on G10 frames
G10 Frame 30cm x 30cm
G10 Frame 30cm x 30cm