Development of a high gradient rf system using a nanocrystalline soft magnetic alloy
The future high intensity upgrade project of the J-PARC (Japan Proton Accelerator Research Complex) MR (Main Ring) includes developments of high gradient rf cavities and magnet power supplies for high repetition rate. The scenario describing the cavity replacements is reported. By the replacement pl...
| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2013-11-01
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| Series: | Physical Review Special Topics. Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevSTAB.16.112002 |
| _version_ | 1818034832902455296 |
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| author | Chihiro Ohmori Eizi Ezura Keigo Hara Katsushi Hasegawa Yasuhiro Makida Ryotaro Muto Masahiro Nomura Toru Ogitsu Taihei Shimada Alexander Schnase Koji Takata Akira Takagi Fumihiko Tamura Kazuhiro Tanaka Makoto Toda Masanobu Yamamoto Masahito Yoshii |
| author_facet | Chihiro Ohmori Eizi Ezura Keigo Hara Katsushi Hasegawa Yasuhiro Makida Ryotaro Muto Masahiro Nomura Toru Ogitsu Taihei Shimada Alexander Schnase Koji Takata Akira Takagi Fumihiko Tamura Kazuhiro Tanaka Makoto Toda Masanobu Yamamoto Masahito Yoshii |
| author_sort | Chihiro Ohmori |
| collection | DOAJ |
| description | The future high intensity upgrade project of the J-PARC (Japan Proton Accelerator Research Complex) MR (Main Ring) includes developments of high gradient rf cavities and magnet power supplies for high repetition rate. The scenario describing the cavity replacements is reported. By the replacement plan, the total acceleration voltage will be almost doubled, while the number of rf stations remains the same. The key issue is the development of a high gradient rf system using high impedance magnetic alloy, FT3L. The FT3L is produced by the transverse magnetic field annealing although the present cavity for the J-PARC adopts the magnetic alloy, FT3M, which is annealed without magnetic field. After the test production using a large spectrometer magnet in 2011, a dedicated production system for the FT3L cores was assembled in 2012. This setup demonstrated that we can produce material with 2 times higher μ_{p}^{′}Qf product compared to the cores used for present cavities. In this summer, the production system was moved to the company from J-PARC and is used for mass production of 280 FT3L cores for the J-PARC MR. The cores produced in the first test production are already used for standard machine operation. The operation experience shows that the power loss in the cores was reduced significantly as expected. |
| first_indexed | 2024-12-10T06:45:26Z |
| format | Article |
| id | doaj.art-9246a377233944f68e319536a5253b4f |
| institution | Directory Open Access Journal |
| issn | 1098-4402 |
| language | English |
| last_indexed | 2024-12-10T06:45:26Z |
| publishDate | 2013-11-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Special Topics. Accelerators and Beams |
| spelling | doaj.art-9246a377233944f68e319536a5253b4f2022-12-22T01:58:40ZengAmerican Physical SocietyPhysical Review Special Topics. Accelerators and Beams1098-44022013-11-01161111200210.1103/PhysRevSTAB.16.112002Development of a high gradient rf system using a nanocrystalline soft magnetic alloyChihiro OhmoriEizi EzuraKeigo HaraKatsushi HasegawaYasuhiro MakidaRyotaro MutoMasahiro NomuraToru OgitsuTaihei ShimadaAlexander SchnaseKoji TakataAkira TakagiFumihiko TamuraKazuhiro TanakaMakoto TodaMasanobu YamamotoMasahito YoshiiThe future high intensity upgrade project of the J-PARC (Japan Proton Accelerator Research Complex) MR (Main Ring) includes developments of high gradient rf cavities and magnet power supplies for high repetition rate. The scenario describing the cavity replacements is reported. By the replacement plan, the total acceleration voltage will be almost doubled, while the number of rf stations remains the same. The key issue is the development of a high gradient rf system using high impedance magnetic alloy, FT3L. The FT3L is produced by the transverse magnetic field annealing although the present cavity for the J-PARC adopts the magnetic alloy, FT3M, which is annealed without magnetic field. After the test production using a large spectrometer magnet in 2011, a dedicated production system for the FT3L cores was assembled in 2012. This setup demonstrated that we can produce material with 2 times higher μ_{p}^{′}Qf product compared to the cores used for present cavities. In this summer, the production system was moved to the company from J-PARC and is used for mass production of 280 FT3L cores for the J-PARC MR. The cores produced in the first test production are already used for standard machine operation. The operation experience shows that the power loss in the cores was reduced significantly as expected.http://doi.org/10.1103/PhysRevSTAB.16.112002 |
| spellingShingle | Chihiro Ohmori Eizi Ezura Keigo Hara Katsushi Hasegawa Yasuhiro Makida Ryotaro Muto Masahiro Nomura Toru Ogitsu Taihei Shimada Alexander Schnase Koji Takata Akira Takagi Fumihiko Tamura Kazuhiro Tanaka Makoto Toda Masanobu Yamamoto Masahito Yoshii Development of a high gradient rf system using a nanocrystalline soft magnetic alloy Physical Review Special Topics. Accelerators and Beams |
| title | Development of a high gradient rf system using a nanocrystalline soft magnetic alloy |
| title_full | Development of a high gradient rf system using a nanocrystalline soft magnetic alloy |
| title_fullStr | Development of a high gradient rf system using a nanocrystalline soft magnetic alloy |
| title_full_unstemmed | Development of a high gradient rf system using a nanocrystalline soft magnetic alloy |
| title_short | Development of a high gradient rf system using a nanocrystalline soft magnetic alloy |
| title_sort | development of a high gradient rf system using a nanocrystalline soft magnetic alloy |
| url | http://doi.org/10.1103/PhysRevSTAB.16.112002 |
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