Author: Gerth, C.
Paper Title Page
MOPPR017 Preliminary Measurement Results of the Upgraded Energy BPM at FLASH 813
  • U. Mavrič, M. Felber, C. Gerth, H. Schlarb
    DESY, Hamburg, Germany
  • W. Jałmużna, A. Piotrowski
    TUL-DMCS, Łódź, Poland
  The energy beam position monitor in the dispersive section of the two bunch compressors is a valuable instrument for regular operation of FLASH. Recently, an upgrade of the existing instrument to a uTCA form factor has been started. The basic principle of the time-of-flight measurement will remain the same, however the detection of the phases and amplitudes of two pulses has been moved to the programmable gate array. Other changes include different RF frequencies of detection, optimization of the front-end section and integration into the control system. A preliminary version of the system has been tested at FLASH and the results are presented in the paper.  
WEOAA02 Inorganic Scintillators for Particle Beam Profile Diagnostics of Highly Brilliant and Highly Energetic Electron Beams 2119
  • G. Kube, C. Behrens, C. Gerth, B. Schmidt
    DESY, Hamburg, Germany
  • W. Lauth
    IKP, Mainz, Germany
  • M. Yan
    Uni HH, Hamburg, Germany
  Transverse beam profile diagnostics in electron linacs are widely based on optical transition radiation (OTR) as standard technique. The experience from modern linac based light sources shows that OTR diagnostics might fail because of coherence effects in the OTR emission process. As consequence, for the new 4th generation light sources as the European X-FEL, new reliable tools for transverse beam profile measurements are required. Scintillating screens are widely used for particle beam diagnostics, especially in transverse profile measurements at hadron machines and low energy electron machines where the intensity of OTR is rather low. Their usage may serve as an alternative way to overcome limitations in OTR based beam diagnostics imposed by the influence of coherent emission. However, there is only little information about scintillator properties for applications with high energetic electrons. Therefore, test experiments have been performed at the Mainz Microtron (MAMI) in order to study the screen applicability. The status of these experiments will be presented and the results will be discussed in view of scintillator material properties and observation geometry.  
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