Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain Duke TRT Progress

Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain

Duke TRT Progress


Outline Status of Module production and acceptance testing Other production responsibilities

Fuse box Capacitors

Work at CERN BSS Barrel TRT assembly


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)


Stringing stations


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….


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


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


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


Capacitor fixtures


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


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


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.

Documents

Seog Oh/ Duke University/September, 2003 TRT Workshop/ Peniscola, Spain Duke TRT Progress