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alignment

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PT01 Closed-orbit correction using the new beam position monitor electronic of Elsa Bonn closed-orbit, quadrupole, electron, resonance 153
 
  • J. Dietrich, I. Mohos, J. Keil
    IKP, Forschungszentrum Jülich GmbH, Jülich, Germany
  RF and digital electronics, developed at the Forschungszentrum Jülich/IKP were integrated to form the new beam position monitor (BPM) system at the Electron Stretcher Accelerator (ELSA) of the University of Bonn. With this system the preservation of the polarization level during acceleration was currently improved by a good correction of the closed-orbit. All BPM offsets relative to the magnetic quadrupole centers were determined by the method of beam-based alignment. The optics functions measured by the BPM system are in good agreement with theoretical predictions.  
 
PT06 New digital BPM system for the Swiss light source feedback, storage-ring, closed-orbit, booster 168
 
  • M. Dehler, A. Jaggi, P. Pollet, T. Schilcher, V. Schlott, R. Uršič, R. deMonte
    PSI, Paul Scherrer Institut, Villigen, Switzerland
  This paper presents a new digital beam position monitor (DBPM) system which is currently under development for the Swiss Light Source (SLS). It is designed to provide sub-micron position data in normal closed orbit, and feedback mode as well as turn by turn information for machine studies and real time tune measurements. The self calibrating four channel system consists of a RF front end, a digital receiver and a DSP module. The same electronics will be used in all sections of the SLS accelerator complex. The system can be reconfigured in real time to perform different kind of measurements like: pulsed for linac and transfer lines, first turn, turn-by-turn, closed orbit, feedback and even tune mode for booster and storage ring. These reconfigurations only involve downloading of new signal processing software and will be performed via EPICS control system. An independent system for monitoring mechanical drifts of the BPM stations will be installed as well. The measured data will be permanently updated in a database and taken into account, when processing the final electron beam positions.  
 
PT14 Experience with stripline beam position monitors on the TESLA test facility LINAC quadrupole, linac, lattice, beam-transport 190
 
  • P. Castro, P. Patteri, F. Tazzioli
    DESY, Deutsches Elektronen Synchrotron, Hamburg, Germany
  Measurement and correction of beam position are very important for the optimization of beam characteristics and alignment in the Tesla Test Facility (TTF) linac. We describe and present measurements with beam of the performance of the stripline beam position monitors (BPMs) in operation and in order to determine the beam response.