| Title |
The Cryogenic Undulator Upgrade Programme at Diamond Light Source |
| Authors |
- Z. Patel, W. Cheng, A. George, S.H. Hale, R. Mercado, A. Ramezani Moghaddam, M. Reeves, G. Sharma, S. Tripathi
DLS, Oxfordshire, United Kingdom
- M.V. Marziani
University of Cape Town, Cape Town, South Africa
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| Abstract |
Diamond Light Source has installed four 2 m long, 17.6 mm period Cryogenic Permanent Magnet Undulators (CPMUs) as upgrades for crystallography beamlines since 2020, with two more planned within the next year. The CPMUs provide 2 - 3 times more brightness and 2 - 4 times more flux than the pure permanent magnet (PPM) devices they are replacing. They have been designed, built, and measured in-house. All four have a 4 mm minimum operating gap and are almost identical in their construction: the main difference being an increase in the number of in-vacuum magnet beam support points from four to five, between CPMU-1 and CPMUs 2 - 4, to better facilitate shimming, particularly at cold temperatures. The ability to shim at cryogenic temperatures necessitated the development of an in-vacuum measurement system. The details of the measurement system will be presented alongside the mechanical and cryogenic design of the undulators; including issues with the magnet foils, and the shimming procedures and tools used to reach the tight magnetic specifications at room temperature and at 77 K.
|
| Paper |
download WE4P36.PDF [5.390 MB / 4 pages] |
| Poster |
download WE4P36_POSTER.PDF [1.656 MB] |
| Cite |
download ※ BibTeX
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※ EndNote |
| Conference |
FLS2023 |
| Series |
ICFA Advanced Beam Dynamics Workshop (67th) |
| Location |
Luzern, Switzerland |
| Date |
27 August-01 September 2023 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Hans-Heinrich Braun (PSI, Villigen, Switzerland); Jan Chrin (PSI, Villigen, Switzerland); Romain Ganter (PSI, Villigen, Switzerland); Nicole Hiller (PSI, Villigen, Switzerland); Volker RW Schaa (GSI, Darmstadt, Germany) |
| Online ISBN |
978-3-95450-224-0 |
| Online ISSN |
2673-7035 |
| Received |
23 August 2023 |
| Revised |
29 August 2023 |
| Accepted |
31 August 2023 |
| Issued |
02 December 2023 |
| DOI |
doi:10.18429/JACoW-FLS2023-WE4P36 |
| Pages |
211-214 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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