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Title Position Resolution of Optical Fibre-Based Beam Loss Monitors Using Long Electron Pulses
  • E. Nebot Del Busto, S. Döbert, F.S. Domingues Sousa, E. Effinger, W. Farabolini, E.B. Holzer, M. Kastriotou, W. Viganò
    CERN, Geneva, Switzerland
  • M.J. Boland
    ASCo, Clayton, Victoria, Australia
  • M.J. Boland
    SLSA, Clayton, Australia
  • M.J. Boland, R.P. Rassool
    The University of Melbourne, Melbourne, Victoria, Australia
  • W. Farabolini
    CEA/DSM/IRFU, France
  • M. Kastriotou, C.P. Welsch
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  • M. Kastriotou, E. Nebot Del Busto, C.P. Welsch
    The University of Liverpool, Liverpool, United Kingdom
Abstract Beam loss monitoring systems based on optical fibres (oBLM), have been under consideration for future colliders for several years. To distinguish losses between consecutive quadrupoles, a position resolution of less than 1 m is required. A resolution of better than 0.5 m has been achieved in machines with single, nanosecond long pulses. For longer beam pulses, such as the ~150 ns CLIC pulse, the longitudinal length of signals in the fibre is close to the duration of the beam pulse itself which makes loss reconstruction very challenging. In this contribution, results from experiments into the position resolution of an oBLM based on long beam pulses are presented. These measurements have been performed at the CLIC Test Facility (CTF3) and the Australian Synchrotron Light Source (ASLS). In CTF3, controlled beam losses were created at different quadrupoles in the 28 m long decelerating Test Beam Line (TBL) LINAC by altering the current supplied or misaligning them. In ASLS the flexibility of the facility allowed the location of beam losses generated by single bunches to be studied as well as losses for longer bunch trains up to 600 ns in duration.
Paper download WEBLA03.PDF [0.906 MB / 5 pages]
Slides download WEBLA03_TALK.PDF [2.109 MB]
Conference IBIC2015, Melbourne, Australia
Series International Beam Instrumentation Conference (4th)
Proceedings Link to full IBIC2015 Proccedings
Session Beam Loss Detection
Date 16-Sep-15   11:00–12:30
Main Classification Beam Loss Detection
Keywords storage-ring, photon, beam-losses, electron, quadrupole
Publisher JACoW, Geneva, Switzerland
Editors Mark Boland (SLSA, Clayton, Australia); David Button (ANSTO, Menai, Australia); Kathleen Riches (SLSA, Clayton, Australia); Volker RW Schaa (GSI, Darmstadt, Germany)
ISBN 978-3-95450-176-2
Published January 2016
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