Author: Ziemann, V.G.
Paper Title Page
MOPWA038 Flashbox Compact Beam Spectrometer and its Application to the High-gradient Acceleration Study 753
 
  • A. Dubrovskiy, F. Tecker
    CERN, Geneva, Switzerland
  • M. Jacewicz, R.J.M.Y. Ruber, V.G. Ziemann
    Uppsala University, Uppsala, Sweden
 
  A Flashbox compact spectrometer has been developed for the Two-beam Test Stand (TBTS), which is a part of the CLIC test facility CTF3 at CERN. It is used to study limitations of high-gradient acceleration in X-band structures being prototyped in the TBTS. The Flashbox is built around the beam tube such that an electron beam can pass to be accelerated in the X-band structure while charged particles emitted from the accelerating structure can be intercepted on the spectrometer consisting of detector plates aligned along the beam axis in combination with magnetic and electric fields. The Flashbox has made it possible to identify electrons and ions emitted by the accelerating structure during RF breakdown. We describe the Flashbox and first results.  
 
WEPEA067 Beam Optics Measurements through Turn by turn Beam Position Data in the SLS 2663
 
  • P. Zisopoulos, Y. Papaphilippou
    CERN, Geneva, Switzerland
  • A. Streun
    PSI, Villigen PSI, Switzerland
  • V.G. Ziemann
    Uppsala University, Uppsala, Sweden
 
  Refined Fourier analysis of turn-by-turn (TBT) transverse position data measurements can be used for determining several beam properties of a ring, such as transverse tunes, optics functions, phases, chromatic properties and coupling. In particular, the Numerical Analysis of Fundamental Frequencies (NAFF) algorithm is used to analyze TBT data from the Swiss Light Source (SLS) storage ring in order to estimate on and off-momentum beam characteristics. Of particular interest is the potential of using the full position information within one turn in order to measure beam optics properties.