Speaker
Dr
Walter Scandale
(CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland)
Description
Study of crystal assisted collimation has been continued at the CERN SPS for different energies of stored beams using 120 GeV/c and 270 GeV/c protons and Pb ions with 270 GeV/c per charge. A bent silicon crystal used as a primary collimator deflected halo particles in channeling regime directing them into the tungsten absorber. A strong correlation of the beam losses in the crystal and off-momentum halo intensity measured in the first high dispersion area downstream was observed. The loss reduction in the crystal was maximal, larger 20, for 270 GeV/c protons. A maximal reduction of the off-momentum halo intensity in the HD area was above 7 and it was observed with Pb ions. A strong loss reduction was also detected in regions of the SPS ring far from the collimation area.
Primary author
Dr
Walter Scandale
(CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland)
Co-author
Dr
Alexander Taratin
(Joint Institute for Nuclear Research, Dubna, Russia)
