TY - CPAPER
AU - Nebot Del Busto, E.
AU - Boland, M.J.
AU - Holzer, E.B.
AU - Jackson, P.D.
AU - Kastriotou, M.
AU - Nebot Del Busto, E.
AU - Rassool, R.P.
AU - Schmidt, J.
AU - Welsch, C.P.
TI - Measurement of Beam Losses Using Optical Fibers at the Australian Synchrotron
J2 - Proc. of IBIC2014
AB - The unprecedented requirements that new machines are setting on their diagnostic systems are leading to the development of a new generation of devices with large dynamic range, sensitivity and time resolution. Beam loss detection is particularly challenging due to the large extension of new facilities that need to be covered with localized detectors. Candidates to mitigate this problem consist of systems in which the sensitive part of the radiation detectors can be extended over the long distances of beam lines. In this document, we study the feasibility of a beam loss monitor (BLM) system based on optical fibers as an active detector for an electron storage ring. The Australian Synchrotron (AS) comprises a 216m ring that stores electrons up to 3GeV. The Accelerator has recently claimed the world record lowest transverse emittance (below 1 pm rad). Ultra low transverse sizes and large amounts of synchrotron radiation provide an environment very similar to that expected in the CLIC damping rings. A qualitative benchmark of beam losses under damping ring-like conditions is presented here. A wide range of beam loss rates can be achieved by modifying the bunch charge, horizontal/vertical coupling and dynamic aperture as well as via beam scrapers. The controlled beam losses are observed by means of the Cherenkov light produced in a 365 um core Silica fiber. The output light is coupled to different types of photo sensors namely: Multi Pixel Photon Counters (MPPCs), standard PhotoMulTiplier (PMT) tubes and Avalanche PhotoDiodes (APD). A detailed comparison of the sensitivities and time resolution obtained with the different read-outs are discussed in this contribution.
PB - JACoW
CY - Geneva, Switzerland
SP - 515
EP - 520
KW - electron
KW - detector
KW - synchrotron
KW - beam-losses
KW - emittance
DA - 2014/10
PY - 2014
SN - 978-3-95450-141-0
UR - http://jacow.org/IBIC2014/papers/weczb3.pdf
ER -