Commissioning and operation status of the MAX IV 3 GeV storage ring vacuum system
(2021) In Journal of Synchrotron Radiation 28. p.718-731- Abstract
The 3 GeV electron storage ring of the MAX IV laboratory is the first storage-ring-based synchrotron radiation facility with the inner surface of almost all the vacuum chambers along its circumference coated with non-evaporable getter (NEG) thin film. The coating provides a low dynamic outgassing rate and pumping of active gases. As the NEG coating was applied on an unprecedented scale, there were doubts concerning the storage ring performance. Fast conditioning of the vacuum system and over five years of reliable accelerator operation have demonstrated that the chosen design proved to be good and does not impose limits on the operation. The vacuum system performance is comparable with or better than that of other similar facilities... (More)
The 3 GeV electron storage ring of the MAX IV laboratory is the first storage-ring-based synchrotron radiation facility with the inner surface of almost all the vacuum chambers along its circumference coated with non-evaporable getter (NEG) thin film. The coating provides a low dynamic outgassing rate and pumping of active gases. As the NEG coating was applied on an unprecedented scale, there were doubts concerning the storage ring performance. Fast conditioning of the vacuum system and over five years of reliable accelerator operation have demonstrated that the chosen design proved to be good and does not impose limits on the operation. The vacuum system performance is comparable with or better than that of other similar facilities around the world, where conventional designs were implemented. Observed pressure levels are low, and the electron beam lifetime is long and not limited by residual gas density. A summary of the vacuum performance is presented.
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- author
- Grabski, Marek LU and Al-Dmour, Eshraq LU
- organization
- publishing date
- 2021-05-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- MAX IV, NEG coatings, synchrotron light source, thin films, vacuum
- in
- Journal of Synchrotron Radiation
- volume
- 28
- pages
- 14 pages
- publisher
- International Union of Crystallography
- external identifiers
-
- scopus:85105512178
- pmid:33949981
- ISSN
- 1600-5775
- DOI
- 10.1107/S1600577521002599
- language
- English
- LU publication?
- yes
- id
- 7967ce2d-c116-4757-89e2-7d85becc1543
- date added to LUP
- 2021-06-09 14:38:49
- date last changed
- 2024-06-15 12:16:07
@article{7967ce2d-c116-4757-89e2-7d85becc1543,
abstract = {{<p>The 3 GeV electron storage ring of the MAX IV laboratory is the first storage-ring-based synchrotron radiation facility with the inner surface of almost all the vacuum chambers along its circumference coated with non-evaporable getter (NEG) thin film. The coating provides a low dynamic outgassing rate and pumping of active gases. As the NEG coating was applied on an unprecedented scale, there were doubts concerning the storage ring performance. Fast conditioning of the vacuum system and over five years of reliable accelerator operation have demonstrated that the chosen design proved to be good and does not impose limits on the operation. The vacuum system performance is comparable with or better than that of other similar facilities around the world, where conventional designs were implemented. Observed pressure levels are low, and the electron beam lifetime is long and not limited by residual gas density. A summary of the vacuum performance is presented.</p>}},
author = {{Grabski, Marek and Al-Dmour, Eshraq}},
issn = {{1600-5775}},
keywords = {{MAX IV; NEG coatings; synchrotron light source; thin films; vacuum}},
language = {{eng}},
month = {{05}},
pages = {{718--731}},
publisher = {{International Union of Crystallography}},
series = {{Journal of Synchrotron Radiation}},
title = {{Commissioning and operation status of the MAX IV 3 GeV storage ring vacuum system}},
url = {{http://dx.doi.org/10.1107/S1600577521002599}},
doi = {{10.1107/S1600577521002599}},
volume = {{28}},
year = {{2021}},
}