| Title |
Field Measurement System for a Cryogenic Permanent Magnet Undulator in TPS |
| Authors |
- C.K. Yang, C.H. Chang, T.Y. Chung, W.H. Hsieh, J.C. Huangpresenter, C.-S. Hwang
NSRRC, Hsinchu, Taiwan
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| Abstract |
Short period in-vacuum, permanent magnet undulators operating at cryogenic temperatures are being developed worldwide to serve as brilliant and coherent light sources for medium energy storage rings. A hybrid cryogenic permanent magnet undulator (CU) with PrFeB magnets has now been designed and constructed at NSRRC [1]. To characterize the performance and to determine magnetic field errors after cool down poses some technical chal-lenges compared to room temperature undulators. A new system combining a Hall probe and a stretched wire has been designed to measure the field integrals, trajectory, phase errors, and K value under low temperature and vacuum conditions. Field measurements in this cryogenic undulator will be performed around 77 K as well as at room temperature, making temperature dependent calibra-tion of the Hall probes necessary. The main features and improvement of the measurement and calibration system are presented.
|
| Paper |
download TUPAB105.PDF [1.200 MB / 3 pages] |
| Export |
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| Conference |
IPAC2017, Copenhagen, Denmark |
| Series |
International Particle Accelerator Conference (8th) |
| Proceedings |
Link to full IPAC2017 Proccedings |
| Session |
Posters Tuesday 1 |
| Date |
16-May-17 16:00–18:00 |
| Main Classification |
02 Photon Sources and Electron Accelerators |
| Sub Classification |
T15 Undulators and Wigglers |
| Keywords |
undulator, cryogenics, vacuum, permanent-magnet, multipole |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Volker RW Schaa (GSI, Darmstadt, Germany); Gianluigi Arduini (CERN, Geneva, Switzerland); Juliana Pranke (ESS, Lund, Sweden); Mike Seidel (PSI, Villigen, Switzerland); Mats Lindroos (ESS, Lund, Sweden) |
| ISBN |
978-3-95450-182-3 |
| Published |
May 2017 |
| Copyright |
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