T he Norwegian atlas project Status report August 31st 2000

Module serial production and testing

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3.2 Module serial production and testing.

The flow of material is as follows :

  • The silicon detectors will come from UiB where they have been tested.

  • The TPG baseplates are produced at CERN and will be delivered directly to UiO.

  • The hybrids will be delivered to UiO either from the producer directly or via Univ. of Uppsala. In either case there will be verification stage of the populated hybrids before the module-construction. This part needs firmer planning.

The thermal and mechanical properties of the modules will be verified and documented at UiO, and entered into the central production database. After module-construction the bonding of the 1536 strips to the hybrids will take place in Uppsala before the modules are distributed for electrical testing at the three institutes in the cluster. The modules will then be delivered to Oxford for mounting on the SCT barrel structure.

Typical construction time for a module is 2-4 hours and 480 modules are planned to be built over 106 weeks. The tests made so far indicate that the construction task itself is not going to be the bottleneck but the rather the electrical testing of hybrids and complete modules, and rework of faulty modules if needed. This is the motivation to install module test equipment in all three laboratories of the production cluster.

Atlas-Norway purchased already in 1997 the basic equipment for module construction. This equipment has been tested and show reproducible precision in the ┬Ám-range for the movements needed during module-construction. A set of jigs is available, but a slightly modified set will be used for the final production.

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