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Beam losses from ultraperipheral nuclear collisions between Pb-208(82+) ions in the Large Hadron Collider and their alleviation

Bruce, Roderik LU ; Bocian, D.; Gilardoni, S. and Jowett, J. M. (2009) In Physical Review Special Topics. Accelerators and Beams 12(7).
Abstract
Electromagnetic interactions between colliding heavy ions at the Large Hadron Collider (LHC) at CERN will give rise to localized beam losses that may quench superconducting magnets, apart from contributing significantly to the luminosity decay. To quantify their impact on the operation of the collider, we have used a three-step simulation approach, which consists of optical tracking, a Monte Carlo shower simulation, and a thermal network model of the heat flow inside a magnet. We present simulation results for the case of Pb-208(82+) ion operation in the LHC, with focus on the ALICE interaction region, and show that the expected heat load during nominal Pb-208(82+) operation is 40% above the quench level. This limits the maximum achievable... (More)
Electromagnetic interactions between colliding heavy ions at the Large Hadron Collider (LHC) at CERN will give rise to localized beam losses that may quench superconducting magnets, apart from contributing significantly to the luminosity decay. To quantify their impact on the operation of the collider, we have used a three-step simulation approach, which consists of optical tracking, a Monte Carlo shower simulation, and a thermal network model of the heat flow inside a magnet. We present simulation results for the case of Pb-208(82+) ion operation in the LHC, with focus on the ALICE interaction region, and show that the expected heat load during nominal Pb-208(82+) operation is 40% above the quench level. This limits the maximum achievable luminosity. Furthermore, we discuss methods of monitoring the losses and possible ways to alleviate their effect. (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
7
publisher
American Physical Society
external identifiers
  • wos:000269302200009
  • scopus:68949154560
ISSN
1098-4402
DOI
10.1103/PhysRevSTAB.12.071002
language
English
LU publication?
yes
id
7954e2c4-2745-4762-a1c8-bcfe6519e51f (old id 1475374)
date added to LUP
2009-10-01 15:31:04
date last changed
2017-09-03 04:23:15
@article{7954e2c4-2745-4762-a1c8-bcfe6519e51f,
  abstract     = {Electromagnetic interactions between colliding heavy ions at the Large Hadron Collider (LHC) at CERN will give rise to localized beam losses that may quench superconducting magnets, apart from contributing significantly to the luminosity decay. To quantify their impact on the operation of the collider, we have used a three-step simulation approach, which consists of optical tracking, a Monte Carlo shower simulation, and a thermal network model of the heat flow inside a magnet. We present simulation results for the case of Pb-208(82+) ion operation in the LHC, with focus on the ALICE interaction region, and show that the expected heat load during nominal Pb-208(82+) operation is 40% above the quench level. This limits the maximum achievable luminosity. Furthermore, we discuss methods of monitoring the losses and possible ways to alleviate their effect.},
  author       = {Bruce, Roderik and Bocian, D. and Gilardoni, S. and Jowett, J. M.},
  issn         = {1098-4402},
  language     = {eng},
  number       = {7},
  publisher    = {American Physical Society},
  series       = {Physical Review Special Topics. Accelerators and Beams},
  title        = {Beam losses from ultraperipheral nuclear collisions between Pb-208(82+) ions in the Large Hadron Collider and their alleviation},
  url          = {http://dx.doi.org/10.1103/PhysRevSTAB.12.071002},
  volume       = {12},
  year         = {2009},
}