A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z  

Malton, S.

Paper Title Page
FRPMN094 Beam Profile Measurements with the 2-D Laser-Wire at PETRA 4303
 
  • M. T. Price, G. A. Blair, S. T. Boogert, G. E. Boorman, A. Bosco, S. Malton
    Royal Holloway, University of London, Surrey
  • K. Balewski, Eckhard. Elsen, V. Gharibyan, H.-C. Lewin, F. Poirier, S. Schreiber, N. J. Walker, K. Wittenburg
    DESY, Hamburg
  • T. Kamps
    BESSY GmbH, Berlin
 
  Funding: Work supported by the PPARC LC-ABD collaboration and the Commission of the European Communities under the 6th Framework Programme Structuring the European Research Area, contract number RIDS-011899.

The current PETRA II Laser-Wire system, being developed for the ILC and PETRA III, uses a piezo-driven mirror to scan laser light across an electron bunch. This paper reports on the recently installed electron-beam finding system, presenting recent horizontal and vertical profile scans with corresponding studies.

 
FRPMS049 Resolution of a High Performance Cavity Beam Position Monitor System 4090
 
  • S. Walston, C. C. Chung, P. Fitsos, J. Gronberg
    LLNL, Livermore, California
  • S. T. Boogert
    Royal Holloway, University of London, Surrey
  • J. C. Frisch, S. Hinton, J. May, D. J. McCormick, S. Smith, T. J. Smith, G. R. White
    SLAC, Menlo Park, California
  • H. Hayano, Y. Honda, N. Terunuma, J. Urakawa
    KEK, Ibaraki
  • Yu. G. Kolomensky, T. Orimoto
    UCB, Berkeley, California
  • P. Loscutoff
    LBNL, Berkeley, California
  • A. Lyapin, S. Malton, D. J. Miller
    UCL, London
  • R. Meller
    Cornell University, Department of Physics, Ithaca, New York
  • M. C. Ross
    Fermilab, Batavia, Illinois
  • M. Slater, M. Thomson, D. R. Ward
    University of Cambridge, Cambridge
  • V. Vogel
    DESY, Hamburg
 
  International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. It is important to the ILC design effort to demonstrate that these tolerances can be achieved – ideally using beam-based stability measurements. It has been estimated that RF cavity beam position monitors (BPMs) could provide position measurement resolutions of less than one nanometer and could form the basis of the desired beam-based stability measurement. We have developed a high resolution RF cavity BPM system. A triplet of these BPMs has been installed in the extraction line of the KEK Accelerator Test Facility (ATF) for testing with its ultra-low emittance beam. A metrology system for the three BPMs was recently installed. This system employed optical encoders to measure each BPM's position and orientation relative to a zero-coefficient of thermal expansion carbon fiber frame and has demonstrated that the three BPMs behave as a rigid-body to less than 5 nm. To date, we have demonstrated a BPM resolution of less than 20 nm over a dynamic range of ± 20 microns.