Endcap Signal Feedthrough Overview Endcap Signal Feedthroughs are constructed and tested in Victoria by Victoria and TRIUMF staff. Each feedthrough unit.

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Presentation transcript:

Endcap Signal Feedthrough Overview Endcap Signal Feedthroughs are constructed and tested in Victoria by Victoria and TRIUMF staff. Each feedthrough unit carries 1920 electrical channels. 50 feedthrough units in total (+5 spares) are required, 25 per endcap. There are 4 different kinds of signal feedthroughs on each endcap cryostat, due to the varied detectors they are servicing. In particular, low voltage is supplied to the HEC preamplifiers, located in the LAr, via signal feedthroughs. Close collaboration with colleagues from BNL (barrel signal feedthroughs) ATLAS reviews Project Review, BNL, Jun Baseline Design review CERN, Oct 13 th 1997 Production Readiness Review, CERN, Jan 29 th 1999 Activity/Systems Status Overview, CERN, Feb One endcap cryostat shown during assembly

Endcap Signal Feedthrough Overview VCR Glands Heater and T probes Ambient Flange Bolt Ring (not shown) to attach to warm vessel Bellows Seal Ring Pin Carriers Bellows Bellows Cuff Ring Vacuum Cables Cold Flange Cold Box or Funnel Pigtail Cables 1920 channels to detector patch panels in the cryostat CF Flange for tests Funnel cut here before welding on cold vessel bi- metallic junction Seal ring OD = mm Total height = mm

Production Status (as of June 10, 2002) 44 feedthrough units produced of which 29 at CERN and officially received. Production expected to end in August or September 2002 All units required for the endcap cryostat C are ready at CERN since March 2002 vacuum cable installation final cold tests

Shipment to CERN crated feedthroughs first 4 HEC feedthroughs in shipping container at the University of Victoria (November 2, 2001) Each feedthrough has its own crate (they come in two sizes) 4 feedthrough crates are then packed together in a large container for shipment

Reception Tests at CERN Feedthrough units are tested upon reception at CERN: visual inspection leak test (ambient temperature) electrical test (cross-talk) The electrical testing equipment will also be used on the cryostat after feedthrough installation electrical testsleak tests

Quality Assurance / Quality Control QA/QC is critical to the success of the project Very detailed document released (QA/QC version 5, March 28, 2002) procedures and documents have been updated after the experience gained from building the first feedthroughs All TIS (CERN Safety) concerns have been addressed (Dec 00) All information stored in a purpose-built database material traceability production and reception test results available on the web: