Author: Nelson, J.
Paper Title Page
TUPC042 First Beam to FACET 1093
 
  • R.A. Erickson, C.I. Clarke, W.S. Colocho, F.-J. Decker, M.J. Hogan, S. Kalsi, N. Lipkowitz, J. Nelson, N. Phinney, P. Schuh, J. Sheppard, H. Smith, T.J. Smith, M. Stanek, J.L. Turner, J. Warren, S.P. Weathersby, U. Wienands, W. Wittmer, M. Woodley, G. Yocky
    SLAC, Menlo Park, California, USA
 
  Funding: This work was supported by the Department of Energy contract DE-AC02-76SF00515.
The SLAC 3km linear electron accelerator has been reconfigured to provide a beam of electrons to the new FACET facility while simultaneously providing an electron beam to the Linac Coherent Light Source (LCLS). FACET is a new experimental facility constructed in the linac tunnel that can transport, compress, and focus electron bunches to support a variety of accelerator R&D experiments. In this paper, we describe our first experiences with the operation of the linac for this new facility.
 
 
TUPC119 A Comprehensive Study of Nanometer Resolution of the IPBPM at ATF2* 1296
 
  • Y.I. Kim, H. Park
    Kyungpook National University, Daegu, Republic of Korea
  • S.T. Boogert
    Royal Holloway, University of London, Surrey, United Kingdom
  • J.C. Frisch, D.J. McCormick, J. Nelson, T.J. Smith, G.R. White, M. Woodley
    SLAC, Menlo Park, California, USA
  • Y. Honda, R. Sugahara, T. Tauchi, N. Terunuma, J. Urakawa
    KEK, Ibaraki, Japan
 
  Funding: Work supported in part by Department of Energy Contract DE-AC02-76SF00515.
High-resolution beam position monitors (IPBPMs) have been developed in order to measure the electron beam position at the focus point of ATF2 to a few nanometers in the vertical plane. To date, the IPBPM system has operated in test mode with a highest demonstrated resolution of 8.7 nm in the ATF extraction line during 2008. After expected noise source calculations there still remains 7.9 nm of noise of unexplained origin. We summarize the experimental work on the IPBPM system since this measurement and outline the possible origins of these sources. We then present a study plan to be performed at the ATF2 facility designed to identify and to improve the resolution performance and comment on the expected ultimate resolution of this system.
 
 
TUPC161 Cavity Beam Position Monitor System for ATF2 1410
 
  • S.T. Boogert, R. Ainsworth, G.E. Boorman, S. Molloy
    Royal Holloway, University of London, Surrey, United Kingdom
  • A.S. Aryshev, Y. Honda, N. Terunuma, J. Urakawa
    KEK, Ibaraki, Japan
  • F.J. Cullinan, N.Y. Joshi, A. Lyapin
    JAI, Egham, Surrey, United Kingdom
  • J.C. Frisch, D.J. McCormick, J. Nelson, T.J. Smith, G.R. White
    SLAC, Menlo Park, California, USA
  • A. Heo, E.-S. Kim, Y.I. Kim
    KNU, Deagu, Republic of Korea
 
  The Accelerator Test Facility 2 (ATF2) in KEK, Japan, is a prototype scaled demonstrator system for the final focus required for a future high energy lepton linear collider. The ATF2 beam-line is instrumented with a total of 41 high resolution C and S band resonant cavity beam position monitors (BPM) with associated mixer electronics and digitizers. In addition 4 high resolution BPMs have been recently installed at the interaction point, we briefly describe the first operational experience of these cavities in the ATF2 beam-line. The current status of the overall BPM system is also described, with a focus on operational techniques and performance.