Autor: |
Shinsaku Mizumoto, Jui-Che Huang, Tsutomu Kohda, Chih-Sheng Yang, Chin-Kang Yang, Hideo Kitamura, Ching-Shiang Hwang, Cheng-Hsing Chang |
Rok vydání: |
2021 |
Předmět: |
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Zdroj: |
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 1013:165650 |
ISSN: |
0168-9002 |
DOI: |
10.1016/j.nima.2021.165650 |
Popis: |
In an in-vacuum undulator, the dynamic phase error, which is a kind of systematic phase errors, is increased because the out-of-vacuum girder is deformed with a strong magnetic force. As a result, the spectral performance of synchrotron radiation is deteriorated. A recommended solution for a problem of this kind is to adopt a spring system to compensate the magnetic force, but a conventional spring system has a problem in that the mechanical frame of the undulator is deformed by a reaction force from the springs. The new force-compensating spring module shown in this paper is a self-contained type that can treat the spring reaction force within the module, therefore, the side effects of the spring operation can be minimized. Three in-vacuum undulators with a length of 2–4 m are equipped with the spring modules of new type, so a small rms phase error of 1.7°–2.2° is obtained under the highest magnetic force at the minimum gap. |
Databáze: |
OpenAIRE |
Externí odkaz: |
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