TRD ROC Status Christian J' Schmidt, GSI Detector Lab'

1
TRD ROC StatusLeak Fixing and General Production

• TRD Status Meeting
• 12.03.2008
• Institute for Nuclear Physics, Darmstadt

2
Underpressure Leak Tests

• Test procedure established at every production
  site.
• of successfully average
• fixed and tested chambers leak
  conductance l/h
• Bucharest 4 3.2
• Heidelberg 1 ?
• Frankfurt 9 1.9
• Dubna 6 0.8
• GSI 111 (incl. SM5) 2.04
• Total to date done 131 1.99
• additionally at CERN 10 (SM4)
  5

SM5 was fixed at GSI, resulting in an overall
added leak conductance of 49.5 l/h
3
What is left to do

• SM3 (30 ch, CERN) 50 are currently
  traveling to GSI
• GSI 43 in the queue after SM3
• Frankfurt 50 still in debate
• Bucharest 21 in the queue, delivery in May
• Heidelberg 13 in the queue
• Münster 3 integration spares, should be fixed
  in Münster
• Dubna 15 delivery planned in June
• SM1 SM2 60 located in space frame
• SM4 20 all have been treated, need testing
• Sum 225

4
Priorities

• Highest Fix and reassemble SM3 and SM4,
  assemble SM5 for installation before April
  25th
• (Kens talk)
• Second Keep constant supply of fixed and tested
  chambers for further SM assembly (GSI,
  Frankfurt), ch. for SM6 are OK
• Third Fix remaining chambers at production sites
  before delivery to GSI
• Fourth Integrate under-pressure leak test into
  final test procedures, replacing previous
  leak test.
• Do not deliver unfixed/ non-tested chambers!
• X.5th Fix and reassemble SM1 and SM2 as soon as
  they may be un-mounted

5
Parts and Materials to Finalize Ch. Production

• Padplanes
• Last fill-in orders and claims for reclamation
  have been sent out to Optiprint
• Backpanels
• Last fill-in orders to complete production have
  been initiated
• Radiators
• Need to collect all superfluous and damaged
  radiators to recover material for the last
  fill-in production at Münster. Please check at
  your site!
• Field-cages
• Some 10 field cage pcb sets are missing, could
  improvise refurbishing other sizes or order new

6
Production Status
448 out of 540 15 (spares) are in production,
an overall of 81
Extrapolation (555 448) / (3,21 ch/week) 33
i.e. beginning Nov. 2008
7
TRD Chamber Production
Target !
August 2008
8
TRD ROC Momentary Production Rates
Observed History and Future Demand
Needed Rates!
9
Individual Issues at Production Sites

• Bucharest is stalled, waiting for material
• Dubna received material to pick up on 22 L2C1
  chambers only very recently. Dubna targets to
  finish production end of November 2008!
• Frankfurt just reached their average again,
  production will not be finished until December
  2008!
• GSI was stalled on testing in order to realize
  leak tests but kept production rate up
• Heidelberg stalled on testing to set up
  underpressure leak-test-stand but kept chamber
  production up as well. August 2008 will
  nevertheless be very ambitious!

10
Summary

• We see land in leak fixing but a lot of carefully
  instructed personal is needed
• Four channel leak test stand with alternated
  Oxygen sensor proved very helpful at GSI
• We should be able to prepare SM3, SM4 and SM5 for
  insertion before April 25th.
• Chamber production is running in spite of the
  additional work load for fixing and testing.
• Nevertheless, the August 1st deadline for
  finishing chamber production has by now become
  unrealistic.