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Measurements of heavy ion beam losses from collimation

Bruce, Roderik LU ; Assmann, R. W.; Bellodi, G.; Bracco, C.; Braun, H. H.; Gilardoni, S.; Holzer, E. B.; Jowett, J. M.; Redaelli, S. and Weiler, T. (2009) In Physical Review Special Topics. Accelerators and Beams 12(1).
Abstract
The collimation efficiency for Pb-208(82+) ion beams in the LHC is predicted to be lower than requirements Nuclear fragmentation and electromagnetic dissociation in the primary collimators create fragments with a wide range of Z/A ratios, which are not intercepted by the secondary collimators but lost where the dispersion has grown sufficiently large. In this article we present measurements and simulations of loss patterns generated by a prototype LHC collimator in the CERN SPS. Measurements were performed at two different energies and angles of the collimator. We also compare with proton loss maps and find a qualitative difference between Pb-208(82+) ions and protons, with the maximum loss rate observed at different places in the ring.... (More)
The collimation efficiency for Pb-208(82+) ion beams in the LHC is predicted to be lower than requirements Nuclear fragmentation and electromagnetic dissociation in the primary collimators create fragments with a wide range of Z/A ratios, which are not intercepted by the secondary collimators but lost where the dispersion has grown sufficiently large. In this article we present measurements and simulations of loss patterns generated by a prototype LHC collimator in the CERN SPS. Measurements were performed at two different energies and angles of the collimator. We also compare with proton loss maps and find a qualitative difference between Pb-208(82+) ions and protons, with the maximum loss rate observed at different places in the ring. This behavior was predicted by simulations and provides a valuable benchmark of our understanding of ion beam losses caused by collimation. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Special Topics. Accelerators and Beams
volume
12
issue
1
publisher
American Physical Society
external identifiers
  • wos:000264273600005
  • scopus:58649104446
ISSN
1098-4402
DOI
10.1103/PhysRevSTAB.12.011001
language
English
LU publication?
yes
id
bad95563-3a08-4b4a-9db5-54b84344d68e (old id 1403035)
date added to LUP
2009-06-15 09:45:04
date last changed
2017-09-03 03:59:00
@article{bad95563-3a08-4b4a-9db5-54b84344d68e,
  abstract     = {The collimation efficiency for Pb-208(82+) ion beams in the LHC is predicted to be lower than requirements Nuclear fragmentation and electromagnetic dissociation in the primary collimators create fragments with a wide range of Z/A ratios, which are not intercepted by the secondary collimators but lost where the dispersion has grown sufficiently large. In this article we present measurements and simulations of loss patterns generated by a prototype LHC collimator in the CERN SPS. Measurements were performed at two different energies and angles of the collimator. We also compare with proton loss maps and find a qualitative difference between Pb-208(82+) ions and protons, with the maximum loss rate observed at different places in the ring. This behavior was predicted by simulations and provides a valuable benchmark of our understanding of ion beam losses caused by collimation.},
  articleno    = {011001},
  author       = {Bruce, Roderik and Assmann, R. W. and Bellodi, G. and Bracco, C. and Braun, H. H. and Gilardoni, S. and Holzer, E. B. and Jowett, J. M. and Redaelli, S. and Weiler, T.},
  issn         = {1098-4402},
  language     = {eng},
  number       = {1},
  publisher    = {American Physical Society},
  series       = {Physical Review Special Topics. Accelerators and Beams},
  title        = {Measurements of heavy ion beam losses from collimation},
  url          = {http://dx.doi.org/10.1103/PhysRevSTAB.12.011001},
  volume       = {12},
  year         = {2009},
}