Author: Hofmann, T.
Paper Title Page
TH2A02 Results From the Laserwire Emittance Scanner and Profile Monitor at CERN's Linac4 715
 
  • T. Hofmann, U. Raich, F. Roncarolo
    CERN, Geneva, Switzerland
  • G.E. Boorman, A. Bosco, S.M. Gibson
    Royal Holloway, University of London, Surrey, United Kingdom
  • G.E. Boorman, A. Bosco, S.M. Gibson
    JAI, Egham, Surrey, United Kingdom
 
  A novel, non-invasive, H laser-wire scanner has been tested during the beam commissioning of CERN's new Linac4. Emittance measurements were performed at beam energies of 3 and 12 MeV with this new device and were found to closely match the results of conventional slit-grid methods. In 2015, the configuration of this laser-wire scanner was substantially modified. In the new setup the electrons liberated by the photo-detachment process are deflected away from the main beam and focused onto a single crystal diamond detector that can be moved in order to follow the laser beam scan. The beam profiles measured with the new laser-wire setup at 50 MeV, 80 MeV and 107 MeV are in good agreement with the measurements of nearby SEM grids and wire-scanners. The design of the final laser-wire scanner for the full 160 MeV beam energy will also be presented. In Linac4 two independent laser-wire devices will be installed in the transfer line to the BOOSTER ring. Each device will be composed of two parts: one hosting the laser-wire and the electron detector and the second hosting the segmented diamond detector used to acquire the transverse profiles of the H0 beamlets.  
slides icon Slides TH2A02 [3.164 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TH2A02  
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