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Magnet design for a low-emittance storage ring.

Johansson, Martin LU ; Anderberg, Bengt and Lindgren, Lars-Johan LU (2014) In Journal of Synchrotron Radiation 21(Pt 5). p.884-903
Abstract
The MAX IV 3 GeV storage ring, currently under construction, pursues the goal of low electron beam emittance by using a multi-bend achromat magnet lattice, which is realised by having several consecutive magnet elements precision-machined out of a common solid iron block, 2.3-3.4 m long. With this magnet design solution, instead of having 1320 individual magnets, the MAX IV 3 GeV storage ring is built up using 140 integrated `magnet block' units, containing all these magnet elements. Major features of this magnet block design are compactness, vibration stability and that the alignment of magnet elements within each unit is given by the mechanical accuracy of the CNC machining rather than individual field measurement and adjustment. This... (More)
The MAX IV 3 GeV storage ring, currently under construction, pursues the goal of low electron beam emittance by using a multi-bend achromat magnet lattice, which is realised by having several consecutive magnet elements precision-machined out of a common solid iron block, 2.3-3.4 m long. With this magnet design solution, instead of having 1320 individual magnets, the MAX IV 3 GeV storage ring is built up using 140 integrated `magnet block' units, containing all these magnet elements. Major features of this magnet block design are compactness, vibration stability and that the alignment of magnet elements within each unit is given by the mechanical accuracy of the CNC machining rather than individual field measurement and adjustment. This article presents practical engineering details of implementing this magnet design solution, and mechanical + magnetic field measurement results from the magnet production series. At the time of writing (spring 2014), the production series, which is totally outsourced to industry, is roughly half way through, with mechanical/magnetic QA conforming to specifications. It is the conclusion of the authors that the MAX IV magnet block concept, which has sometimes been described as new or innovative, is from a manufacturing point of view simply a collection of known mature production methods and measurement procedures, which can be executed at fixed cost with a low level of risk. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Synchrotron Radiation
volume
21
issue
Pt 5
pages
884 - 903
publisher
Wiley-Blackwell
external identifiers
  • pmid:25177980
  • wos:000341687000006
  • scopus:84912054412
ISSN
1600-5775
DOI
10.1107/S160057751401666X
language
English
LU publication?
yes
id
42888819-b5cf-4352-b3b7-ebf454d50314 (old id 4692656)
date added to LUP
2014-10-06 20:18:41
date last changed
2017-04-02 03:12:59
@article{42888819-b5cf-4352-b3b7-ebf454d50314,
  abstract     = {The MAX IV 3 GeV storage ring, currently under construction, pursues the goal of low electron beam emittance by using a multi-bend achromat magnet lattice, which is realised by having several consecutive magnet elements precision-machined out of a common solid iron block, 2.3-3.4 m long. With this magnet design solution, instead of having 1320 individual magnets, the MAX IV 3 GeV storage ring is built up using 140 integrated `magnet block' units, containing all these magnet elements. Major features of this magnet block design are compactness, vibration stability and that the alignment of magnet elements within each unit is given by the mechanical accuracy of the CNC machining rather than individual field measurement and adjustment. This article presents practical engineering details of implementing this magnet design solution, and mechanical + magnetic field measurement results from the magnet production series. At the time of writing (spring 2014), the production series, which is totally outsourced to industry, is roughly half way through, with mechanical/magnetic QA conforming to specifications. It is the conclusion of the authors that the MAX IV magnet block concept, which has sometimes been described as new or innovative, is from a manufacturing point of view simply a collection of known mature production methods and measurement procedures, which can be executed at fixed cost with a low level of risk.},
  author       = {Johansson, Martin and Anderberg, Bengt and Lindgren, Lars-Johan},
  issn         = {1600-5775},
  language     = {eng},
  number       = {Pt 5},
  pages        = {884--903},
  publisher    = {Wiley-Blackwell},
  series       = {Journal of Synchrotron Radiation},
  title        = {Magnet design for a low-emittance storage ring.},
  url          = {http://dx.doi.org/10.1107/S160057751401666X},
  volume       = {21},
  year         = {2014},
}