Author: Moss, A.J.
Paper Title Page
MOPMR035 Bunch Length Measurements using a Transverse Deflecting Cavity on VELA 323
 
  • J.W. McKenzie, S.R. Buckley, L.S. Cowie, P. Goudket, M. Jenkins, B.L. Militsyn, A.J. Moss, A.E. Wheelhouse
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • G. Burt
    Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
  • A. Wolski
    The University of Liverpool, Liverpool, United Kingdom
 
  The VELA facility at Daresbury Laboratory in the UK includes a 5 MeV/c 2.5 cell S-band photoinjector gun. This gun operates in the "blow-out" regime with a sub-200 fs length drive laser: the resulting bunch length is determined by space-charge effects. We present measurements made with an S-band transverse deflecting cavity to characterise the bunch length as a function of charge, and as a function of the gun operating phase.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR035  
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TUPOW027 Model Independent Analysis of Beam Jitter on VELA 1806
 
  • J.K. Jones, K.D. Dumbell, A.J. Moss, E.W. Snedden
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
 
  The Versatile Electron Linear Accelerator (VELA) is a facility designed to provide high quality electron beams for accelerator systems development, as well as industrial and scientific applications. A key performance indicator for many applications is the inherent beam jitter on the machine (temporal, momentum and positional). Analysis of this beam jitter indicates that there are several independent mechanisms driving the beam motion. We use model independent analysis to correlate various dominant modes of beam jitter and compare them to simulations. We also compare the dominant modes before and after intervention work on the DLLRF timing system, and determine the relevant changes in beam motion.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOW027  
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