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Commissioning of the Multipole Injection Kicker in the MAX IV 1.5 GeV ring

Apollonio, Marco LU ; Vorozhtsov, Alexey LU ; Andersson, Åke LU ; Breunlin, Jonas LU ; Chernenko, Kirill LU ; Golias, Evangelos LU orcid ; Kokkonen, Esko LU orcid ; Polley, Craig LU ; Preobrajenski, Alexei LU and Sjöström, Magnus LU , et al. (2025) In Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1080.
Abstract

The Multipole Injection Kicker (MIK) installed in the 3 GeV ring of MAX IV, is a success story in the use of a non-linear field device ensuring an almost transparent injection into the first ever built fourth-generation storage ring. Reducing the transient stored beam perturbations during top-up injections is particularly relevant for such machines operating at emittances in the regime of few hundred pm.rad, however it maintains its significant impact also when operated with more ordinary third-generation storage rings, ensuring large injection efficiencies, more frequent top-ups and of course minimal disturbance of the stored beam during injection, particularly important when operating long period insertion devices in the minimum gap... (More)

The Multipole Injection Kicker (MIK) installed in the 3 GeV ring of MAX IV, is a success story in the use of a non-linear field device ensuring an almost transparent injection into the first ever built fourth-generation storage ring. Reducing the transient stored beam perturbations during top-up injections is particularly relevant for such machines operating at emittances in the regime of few hundred pm.rad, however it maintains its significant impact also when operated with more ordinary third-generation storage rings, ensuring large injection efficiencies, more frequent top-ups and of course minimal disturbance of the stored beam during injection, particularly important when operating long period insertion devices in the minimum gap region. Following the expertise matured during the years of operation in our 3 GeV machine, we installed and commissioned a MIK in the 1.5 GeV ring, which provides injection efficiencies larger than 90%, top-ups every 10 min and beam size variations smaller than 10 % in both planes. The paper reports about the progress done from the initial beam dynamics evaluations, passing through the installation of the device and its daily operations, up to the final tests with the beamlines meant to evaluate its performance from the user's point of view.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Injection systems, Multipole pulsed injector, Top-up injection, Transparent injection
in
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
volume
1080
article number
170620
publisher
Elsevier
external identifiers
  • scopus:105006728317
ISSN
0168-9002
DOI
10.1016/j.nima.2025.170620
language
English
LU publication?
yes
id
6ffc2ed1-86ae-4088-a5a7-337420a14c56
date added to LUP
2025-07-14 11:51:26
date last changed
2025-07-14 11:52:42
@article{6ffc2ed1-86ae-4088-a5a7-337420a14c56,
  abstract     = {{<p>The Multipole Injection Kicker (MIK) installed in the 3 GeV ring of MAX IV, is a success story in the use of a non-linear field device ensuring an almost transparent injection into the first ever built fourth-generation storage ring. Reducing the transient stored beam perturbations during top-up injections is particularly relevant for such machines operating at emittances in the regime of few hundred pm.rad, however it maintains its significant impact also when operated with more ordinary third-generation storage rings, ensuring large injection efficiencies, more frequent top-ups and of course minimal disturbance of the stored beam during injection, particularly important when operating long period insertion devices in the minimum gap region. Following the expertise matured during the years of operation in our 3 GeV machine, we installed and commissioned a MIK in the 1.5 GeV ring, which provides injection efficiencies larger than 90%, top-ups every 10 min and beam size variations smaller than 10 % in both planes. The paper reports about the progress done from the initial beam dynamics evaluations, passing through the installation of the device and its daily operations, up to the final tests with the beamlines meant to evaluate its performance from the user's point of view.</p>}},
  author       = {{Apollonio, Marco and Vorozhtsov, Alexey and Andersson, Åke and Breunlin, Jonas and Chernenko, Kirill and Golias, Evangelos and Kokkonen, Esko and Polley, Craig and Preobrajenski, Alexei and Sjöström, Magnus and Svärd, Robin and Tavares, Pedro Fernandes and Thiagarajan, Balasubramanian and Wang, Weimin and Zakharov, Alexei}},
  issn         = {{0168-9002}},
  keywords     = {{Injection systems; Multipole pulsed injector; Top-up injection; Transparent injection}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment}},
  title        = {{Commissioning of the Multipole Injection Kicker in the MAX IV 1.5 GeV ring}},
  url          = {{http://dx.doi.org/10.1016/j.nima.2025.170620}},
  doi          = {{10.1016/j.nima.2025.170620}},
  volume       = {{1080}},
  year         = {{2025}},
}