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Corrector-based magnet alignment procedure

Sjöström, Magnus LU ; Wallén, Erik LU ; Eriksson, Mikael LU and Lindgren, Lars-Johan LU (2008) In Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment 597(2-3). p.170-177
Abstract
A method of realigning the quadrupole magnets in storage rings to achieve minimum dipole corrector strengths is described. The corrector strengths after realignment are mainly determined by Beam Position Monitor offsets relative to the quadrupole magnets they have been calibrated against and the extent to which magnet dipole errors stay constant during the realignment. The accuracy to which quadrupole misalignments can be determined is mainly limited by dipole errors not originating from quadrupole displacements and the accuracy to which BPM offsets can be determined. After realigning a ring by the described method, any subsequent realignment with the aim to compensate for long-term magnet movements can be performed with greater accuracy.... (More)
A method of realigning the quadrupole magnets in storage rings to achieve minimum dipole corrector strengths is described. The corrector strengths after realignment are mainly determined by Beam Position Monitor offsets relative to the quadrupole magnets they have been calibrated against and the extent to which magnet dipole errors stay constant during the realignment. The accuracy to which quadrupole misalignments can be determined is mainly limited by dipole errors not originating from quadrupole displacements and the accuracy to which BPM offsets can be determined. After realigning a ring by the described method, any subsequent realignment with the aim to compensate for long-term magnet movements can be performed with greater accuracy. The method was applied at the MAX III storage ring and the magnet positions were then measured in the conventional way with a laser tracker. The difference between the two methods is discussed. Finally, the realignment result was compared with simulated results for two different MAX III test cases. (C) 2008 Elsevier B.V. All rights reserved. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
Accelerator, Alignment, Corrector magnet, Positioning
in
Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
volume
597
issue
2-3
pages
170 - 177
publisher
Elsevier
external identifiers
  • wos:000261991500010
  • scopus:56449106817
ISSN
0167-5087
DOI
10.1016/j.nima.2008.09.011
language
English
LU publication?
yes
id
4ab90e8a-3aa4-424d-b345-279f3740babf (old id 1415775)
date added to LUP
2009-06-10 14:50:50
date last changed
2017-08-27 04:49:29
@article{4ab90e8a-3aa4-424d-b345-279f3740babf,
  abstract     = {A method of realigning the quadrupole magnets in storage rings to achieve minimum dipole corrector strengths is described. The corrector strengths after realignment are mainly determined by Beam Position Monitor offsets relative to the quadrupole magnets they have been calibrated against and the extent to which magnet dipole errors stay constant during the realignment. The accuracy to which quadrupole misalignments can be determined is mainly limited by dipole errors not originating from quadrupole displacements and the accuracy to which BPM offsets can be determined. After realigning a ring by the described method, any subsequent realignment with the aim to compensate for long-term magnet movements can be performed with greater accuracy. The method was applied at the MAX III storage ring and the magnet positions were then measured in the conventional way with a laser tracker. The difference between the two methods is discussed. Finally, the realignment result was compared with simulated results for two different MAX III test cases. (C) 2008 Elsevier B.V. All rights reserved.},
  author       = {Sjöström, Magnus and Wallén, Erik and Eriksson, Mikael and Lindgren, Lars-Johan},
  issn         = {0167-5087},
  keyword      = {Accelerator,Alignment,Corrector magnet,Positioning},
  language     = {eng},
  number       = {2-3},
  pages        = {170--177},
  publisher    = {Elsevier},
  series       = {Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment},
  title        = {Corrector-based magnet alignment procedure},
  url          = {http://dx.doi.org/10.1016/j.nima.2008.09.011},
  volume       = {597},
  year         = {2008},
}