Keyword: undulator
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MOPP020 First Tests Using Sipm Based Beam Loss Monitors at the European XFEL FEL, detector, photon, radiation 126
 
  • T. Wamsat, P.A. Smirnov
    DESY, Hamburg, Germany
 
  The European XFEL MTCA based Beam Loss Monitor System (BLM) is composed of about 450 monitors using photomultiplier tubes (PMTs). BLMs installed in the SASE undulator intersections show high signals at electron energy higher 16 GeV or photon energy higher 14 keV due to background synchrotron radiation which directly affects the PMT. The amplitude of this signal can get that high that, also without using any scintillating material, the BLMs get blind for real losses. Also different lead arrangements did not shield the signal sufficiently. First tests show that a Silicon photomultiplier (SiPM) is not affected. Also there are several advantages to use SiPM, they are cheaper by factor of 40 and operating voltage is below 45V. First test will be presented and how it can get implemented in the existing BLMs and BLM system.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP020  
About • paper received ※ 04 September 2019       paper accepted ※ 08 September 2019       issue date ※ 10 November 2019  
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THAO04 Transverse Emittance Measurement using Undulator High Harmonics for Diffraction Limited Storage Rings emittance, radiation, simulation, electron 673
 
  • K.P. Wootton, J.L. McChesney, F.M. Rodolakis, N. Sereno, B.X. Yang
    ANL, Lemont, Illinois, USA
 
  Funding: This research used resources of the Advanced Photon Source, operated for the U.S Department of Energy Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
A particular challenge for diagnostics in diffraction limited storage ring light sources is the measurement of electron beam transverse emittances. In the present work, we present measurements and simulations of vertical electron beam emittance using high harmonics from an electromagnetic undulator in the present Advanced Photon Source storage ring. Based on these results, using simulation we motivate an undulator-based horizontal and vertical transverse emittance monitor for diffraction limited storage rings, using the Advanced Photon Source Upgrade as an example.
 
slides icon Slides THAO04 [2.655 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-THAO04  
About • paper received ※ 04 September 2019       paper accepted ※ 10 September 2019       issue date ※ 10 November 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)