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Online optimisation of the MAX IV 3 GeV storage ring octupoles

Olsson, David K. LU ; Andersson, Åke LU and Sjöström, Magnus LU (2023) In Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1046.
Abstract

The MAX IV 3 GeV storage ring lattice contains three separate families of octupole magnets. During the lattice design, they served the purpose of minimising the amplitude-dependent tune shift. Ensuring the optimal settings of the octupoles is important in order to achieve the desired machine performance in terms of transverse dynamic acceptance and momentum acceptance. This paper describes the online optimisation process used to find octupole settings which improve the Touschek lifetime, and better recreate the desired amplitude-dependent tune shift, as well as their effect on transverse dynamic acceptance and momentum acceptance.

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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Amplitude-dependent tune shift, Octupole, Optimisation, Touschek lifetime
in
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
volume
1046
article number
167780
publisher
Elsevier
external identifiers
  • scopus:85142322960
ISSN
0168-9002
DOI
10.1016/j.nima.2022.167780
language
English
LU publication?
yes
id
1ffbfa85-67ab-4a70-ad5a-6cae0faa2d7a
date added to LUP
2023-02-09 14:00:16
date last changed
2023-10-12 14:55:44
@article{1ffbfa85-67ab-4a70-ad5a-6cae0faa2d7a,
  abstract     = {{<p>The MAX IV 3 GeV storage ring lattice contains three separate families of octupole magnets. During the lattice design, they served the purpose of minimising the amplitude-dependent tune shift. Ensuring the optimal settings of the octupoles is important in order to achieve the desired machine performance in terms of transverse dynamic acceptance and momentum acceptance. This paper describes the online optimisation process used to find octupole settings which improve the Touschek lifetime, and better recreate the desired amplitude-dependent tune shift, as well as their effect on transverse dynamic acceptance and momentum acceptance.</p>}},
  author       = {{Olsson, David K. and Andersson, Åke and Sjöström, Magnus}},
  issn         = {{0168-9002}},
  keywords     = {{Amplitude-dependent tune shift; Octupole; Optimisation; Touschek lifetime}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment}},
  title        = {{Online optimisation of the MAX IV 3 GeV storage ring octupoles}},
  url          = {{http://dx.doi.org/10.1016/j.nima.2022.167780}},
  doi          = {{10.1016/j.nima.2022.167780}},
  volume       = {{1046}},
  year         = {{2023}},
}