Electrical Integrity Tests During Production of the LHC Dipoles

摘要

For the LHC dipoles , mandatory electrical integrity tests are performed to qualify the cold mass (CM) at four production stages: individual pole, collared coil, CM before end cover welding and final CM. A description of the measurement equipment and its recent development are presented. After passing the demands set out in the specification, the results of the tests are transmitted to CERN where they are further analyzed. The paper presents the most important results of these measurements. We also report a review of the electrical nonconformities encountered e.g. inter-turn shorts and quench heater failure, their diagnostic and the cures.