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Coelingh, G.-J.

Paper Title Page
MODP24

 Arc Detector System For Extraction Switches In LHC CERN 

  • V. Ovchar, E. Kuper
    Budker Institute of Nuclear Physics, Novosibirsk, Russia
  • K.Dahlerup-Petersen, G.-J. Coelingh
    Accelerator Technology Department, CERN, Geneva, Switzerland

Cluster of 8 electro-mechanical D.C. breakers will be used for current interruption and fast extraction of magnetic field energy to dump resistors in the superconducting chains of main dipoles and quadrupoles in LHC (Large Hadron Collider), CERN, Switzerland. Parallel connection (four brunches) and series connection (two in series) will be used in cluster for current and voltage matching. Contact erosion as usual occurs in the slowest branch, in two breakers from eight in cluster. The number of interruption is limited by contact erosion and some parts need replacement after some interruptions with arcs. The total number of breakers in the system is 256. For breakers resources registration and for prophylaxis works facilitation the 8 channels Arc Detector was designed. Each channel consists of light signal integrator, comparator and counter of events. Spark Detector for registration of discharges in power RF generators and feeders was designed on the base of Arc Detector

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