JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
@inproceedings{patel:fls2023-we4p36,
author = {Z. Patel and W. Cheng and A. George and S.H. Hale and M.V. Marziani and R. Mercado and A. Ramezani Moghaddam and M. Reeves and G. Sharma and S. Tripathi},
% author = {Z. Patel and W. Cheng and A. George and S.H. Hale and M.V. Marziani and R. Mercado and others},
% author = {Z. Patel and others},
title = {{The Cryogenic Undulator Upgrade Programme at Diamond Light Source}},
% booktitle = {Proc. FLS'23},
booktitle = {Proc. 67th ICFA Adv. Beam Dyn. Workshop Future Light Sources (FLS'23)},
eventdate = {2023-08-27/2023-09-01},
pages = {211--214},
paper = {WE4P36},
language = {english},
keywords = {vacuum, undulator, MMI, cryogenics, insertion-device},
venue = {Luzern, Switzerland},
series = {ICFA Advanced Beam Dynamics Workshop},
number = {67},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {01},
year = {2024},
issn = {2673-7035},
isbn = {978-3-95450-224-0},
doi = {10.18429/JACoW-FLS2023-WE4P36},
url = {http://jacow.org/fls2023/papers/we4p36.pdf},
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.}},
}