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Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain
Duke TRT Progress
Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain
Outline Status of Module production and acceptance testing Other production responsibilities
Fuse box Capacitors
Work at CERN BSS Barrel TRT assembly
Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain
Module Production Mechanical Construction – ended in May
All Type II (M2.01 to M2.37) are completed and gas tight. All Type III (even number Type III (minus M3.32,M3.34)) are
completed and gas tight.
Stringing Type II
M2.37 is in progress (last module) Type III
5 Modules were sent to Hampton for stringing M3.36 is in progress (last module)
Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain
Stringing stations
Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain
Wire-joint production We have enough for the
production/rework in US. We are producing for rework
at 154 and spares: ~5000 is planned.
~100,000 has been produced….
Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain
Acceptance /Gain map Acceptance work -> pass the specification
HV/Tension /Leak Rate/Dimensional Check/Signal testing 8 Type II, and 6 Type III were sent to Hampton after
acceptance testing for gain map. Type II : Three modules are left to process Type III : Two modules are left to process
Duke Gain Mapping Has mapped ~20 modules
<1% of dead straws : cannot be fixed– Bent straws, Stringing problem
Eight type II and three type III modules to go
Will process and ship all modules at Duke by November
Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain
Fuses Boxes The design is completed and
entire production quantity is being machined (<- slight delay after pre-production run due to tolerance problem)
To receive the first batch of fuses (~1800)
No good estimation for the assembly time yet.
Should we test fuses through random sampling?
Acceptance specification? Not in critical path
Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain
HV capacitor assembly Decision was made to go with NPO/850pf /2000 volts. We are in production
assembled ~ 7000 capacitors out of ~19,000. ~200 were used in the beam test Final rad hardness test was done with production capacitors
HV soaking for two months at 2750 volts– 50 capacitors – current draw : 50-100 nA
Some were sent for rad testing– Neutron radiation test (5x1014n/cm2)– Co60 radiation test (20 MRad)
Under 2750 volts after the test - no problems so far
After assembly Long term HV soaking test (10 days at 2750 volts). A fixture to test 2000
capacitors at once is being tested Coating
Tested spraying technique (with paint spray gun) and looked promising Spray ~100 at one time Minimum thickness of ~30 microns
Not in critical path
Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain
Capacitor fixtures
Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain
BSS assembly One of Jack & Doug’s main
tasks Responsible for RF
shielding – technique has developed
Dimensional measurement and analysis of endframes and cylinders
Actual assembly with CERN personnel
Get it ready as soon as endframes and cylinder are ready
Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain
Barrel TRT assembly Duke will be ready to make a ‘substantial’
contribution All our production responsibilities will be over by early 04 People: Doug, Jack, one tech, Chiho, Bill, Seog
Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain
Summary Our module production/testing will be over including
the gain mapping by November, 03 Capacitor and fuse box assembly/testing will be
finished by early 04 We should be ready for the barrel TRT assembly, and
are looking forward it.