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| TUPMP015 |
Magnet Power Supply Calibration with a Portable Current Measuring Unit at the J-PARC Main Ring |
1263 |
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- K. Miura, Y. Kurimoto, Y. Morita, D. Naito, T. Oogoe, T. Shimogawa
KEK, Ibaraki, Japan
- Y. Kuniyasu
Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
- K. Ooya
SANKYU PLANT TECHNO CO., LTD., 6-5-3, Kachidoki, Japan
- R. Sagawa
Universal Engineering, Ibaraki-ken, Japan
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In the J-PARC MR, 96 bending magnets (BMs) are used in total. They are divided into 6 groups of 16 BMs. The 16 BMs in each group are connected in series and driven by a single power supply. Since all 96 BMs are symmetrically located in the ring, the magnet currents regulated by the 6 power supplies need to be same. Each power supply performs output current feedback control using electronic circuits including analog amplifications and AD / DA conversions. Due to individual differences of the electronic circuits, output current is generally expected to be different for each power supply. Therefore, we developed a current measurement unit with the portable DCCT as an independent reference. Further, we measured the magnet currents regulated by the 6 BM power supplies using the unit. We report the details of the unit as well as the results of the current measurements.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-TUPMP015
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| About • |
paper received ※ 14 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019 |
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