An in-vacuum measurement system for CPMUs at Diamond Light Source

An in-vacuum Hall probe measurement system was designed, built, and used to measure four Cryogenic Permanent Magnet Undulators (CPMUs) at Diamond Light Source. The devices were tuned to correct the phase error at cold temperatures based on the measurements from the in-vacuum system. The in-vacuum sy...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Conference series 2024-01, Vol.2687 (3), p.32042
Main Authors: Patel, Z, Cheng, W, George, A, Hale, S, Marziani, M, Ramezani Moghaddam, A, Reeves, M, Sharma, G, Tripathi, S
Format: Article
Language:English
Subjects:
Diamonds
Error correction
Girders
Hall probes
Light sources
Permanent magnets
Phase error
Room temperature
Temperature
Temperature compensation
Vacuum gages
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An in-vacuum Hall probe measurement system was designed, built, and used to measure four Cryogenic Permanent Magnet Undulators (CPMUs) at Diamond Light Source. The devices were tuned to correct the phase error at cold temperatures based on the measurements from the in-vacuum system. The in-vacuum system consists of a stretched wire system supplied by Danfysik and an in-house built Hall probe system. The Hall probe system has gone through two iterations: the first beam was prone to deforming with temperature changes; the second was made thicker following design changes to the magnet holders and girders of the CPMUs which allowed more space for the beam inside the vacuum vessel. The design and commissioning of the measurement system will be presented, along with some measurements of the CPMUs at room temperature and at 77 K. Details such as triggering of the Hall probe measurements, height compensation, and temperature compensation will be covered.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2687/3/032042