Author: Hubert, N.
Paper Title Page
WECL2 Radiation Damages and Characterization in the SOLEIL Storage Ring 644
  • N. Hubert, P. Brunelle, N. Béchu, L. Cassinari, C. Herbeaux, S. Hustache, J.-F. Lamarre, P. Lebasque, F. Marteau, A. Nadji, L.S. Nadolski
    SOLEIL, Gif-sur-Yvette, France
  After six years of operation, equipment located close to some vacuum chambers of the SOLEIL storage ring show unexpected damages due to radiation. It has been pointed out that, inside the so called “quadrupole” vacuum chambers, fluorescence X-rays are emitted by the materials that intercept upstream dipole synchrotron radiation. The energy of the emitted X-ray is too high to be significantly attenuated by the aluminum of which the vacuum chamber is made. Diagnostics and means used to characterize this radiation are presented, and measurements are compared to calculations.  
slides icon Slides WECL2 [2.336 MB]  
Beam Position Monitors for the LUNEX5 Project  
  • N. Hubert
    SOLEIL, Gif-sur-Yvette, France
  Nicolas presented the LUNEX5 project, a FEL, driven by either a conventional 400 MeV linac, or in future by a laser wakefield accelerator in a tuneable energy range 0.3…1GeV (called the COXINAL project). Both projects require BPMs for the orbit measurement. The requirements, presented by Nicolas, initiated a little discussion on stripline/button BPMs vs. cavity BPMs. In this case, with a required 5…30 um resolution (at 500 resp. 10pC bunch charge) in a 20mm diameter beam pipe, we suggested to go with striplines or even buttons. With respect to the laser wakefield acceleration, experience at CERN shows a high EMI near the experimental setup, from which any beam diagnostics may suffer.  
slides icon Slides FRWMJ4 [0.502 MB]