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Title First Operation of the Abort Gap Monitor for LHC Submitted 08-DEC-09 02:58 (UTC)
Classification 06 Beam Instrumentation and Feedback Modified
Presentation Poster
Presenter Thibaut Lefevre Paper ID WEPEB072
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Author(s) Thibaut Lefevre, Stephane Bart Pedersen, Andrea Boccardi, Enrico Bravin, A. Goldblatt, Adam Jeff, Federico Roncarolo (CERN, Geneva), Alan Stephen Fisher (SLAC, Menlo Park, California)
Abstract The LHC beam dump system relies on extraction kickers that need 3 microseconds to rise up to their nominal field. As a consequence, particles crossing the kickers during this rise time will not be dumped properly. The proton population during this time should remain below quench and damage limits at all times. A specific monitor has been designed to measure the particle population in this gap. It is based on the detection of Synchrotron radiation using a gated photomultiplier. Since the quench and damage limits change with the beam energy, the acceptable population in the abort gap and the settings of the monitor must be adapted accordingly. This paper presents the design of the monitor, the calibration procedure and the detector performance with beam.
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