Author: Mazzolari, A.
Paper Title Page
THPFI059 Robustness Test of a Silicon Strip Crystal for Crystal-assisted Collimation Studies in the LHC 3427
  • A. Lechner, J. Blanco Sancho, F. Burkart, M. Calviani, M. Di Castro, Y. Gavrikov, J. Lendaro, F. Loprete, R. Losito, C. Maglioni, A. Masi, S. Montesano, A. Perillo-Marcone, P.S. Roguet, W. Scandale, D. Wollmann
    CERN, Geneva, Switzerland
  • J. Blanco Sancho
    EPFL, Lausanne, Switzerland
  • F. Burkart
    IAP, Frankfurt am Main, Germany
  • Y. Gavrikov
    PNPI, Gatchina, Leningrad District, Russia
  • V. Guidi, A. Mazzolari
    INFN-Ferrara, Ferrara, Italy
  • V. Guidi, A. Mazzolari
    UNIFE, Ferrara, Italy
  • W. Scandale
    LAL, Orsay, France
  Over the past years, the UA9 experiment has successfully demonstrated the viability of enhancing the collimation efficiency of proton and ion beams in the SPS by means of bent crystals. An extension of UA9 to the LHC has been recently approved. The conditions imposed by the LHC operational environment, in particular the tremendous energy density of the beam, require a reliable understanding of the crystal integrity in view of potential accident scenarios such as an asynchronous beam dump. For this purpose, irradiation tests have been performed at the CERN-HiRadMat facility to examine the mechanical strength of a silicon strip crystal in case of direct beam impact. The tests were carried out using a 440 GeV proton beam of 0.5 mm transverse size. The crystal, 3 mm long in beam direction, was exposed to a total of 2*1014 protons, with individual pulse intensities reaching up to 3*1013. First visual inspections reveal no macroscopic damage to the crystal. Complementary post-irradiation tests are foreseen to assess microscopic lattice damage as well as the degradation of the channelling efficiency.
On behalf of the UA9 Collaboration.