Keyword: beam-losses
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MOPA10 Diamond Detectors for LHC injection, instrumentation, diagnostics, controls 1
 
  • E. Griesmayer
    CIVIDEC Instrumentation, Wien, Austria
  • B. Dehning
    CERN, Geneva, Switzerland
 
  Funding: CIVIDEC Instrumentation GmbH
Diamond detectors are installed at the LHC as fast beam loss monitors. Their excellent time resolution make them a useful beam diagnostic tool for bunch-to-bunch beam loss observations, which is essential for the understanding of fast beam loss scenarios at the LHC.
 
 
TUPA08 Application of Single Crystal Diamonds (scCVD) as Beam Conditions Monitors at LHC luminosity, vacuum, background, proton 1
 
  • M.E. Castro Carballo
    DESY Zeuthen, Zeuthen, Germany
 
  The properties of the single-crystal diamond (scCVD): radiation hardness, low leakage current and fast signal, make it suitable for use as a particle detector in areas of high radiation dose. The Beam Conditions and Radiation Monitoring system (BRM) of the CMS experiment has a monitor (BCM1F) consisting of 4 modules located 1.8 m away from the interaction point, on both sides. Each module contains a sensor, radiation hard FEE and optical transmission of the signal. It counts single particles of beam halo, beam-gas, machine induced background, and collision products. The BRM protects CMS from high beam losses and provides feedback to the LHC and CMS on the beam conditions. The BCM1F sub-detector is very helpful as it is able to provide different background information together with luminosity correlations. Additional scCVD sensors are being installed in the LHC ring to be used as BLMs. The new BLM system (BCM1F4LHC) will be composed of 8 diamonds in points likely to suffer from beam losses. Nowadays, four sensors deliver information of hit rates that are correlated to the existing BLMs. A characterization of both BCM1F systems is presented.