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Magnetization and field quality of a cosine-theta dipole magnet wound with coated conductors for rotating gantry for hadron cancer therapy
https://repo.qst.go.jp/records/47601
https://repo.qst.go.jp/records/4760145cbacdb-a4e3-4298-943c-fe5cf1559608
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-01-04 | |||||
| タイトル | ||||||
| タイトル | Magnetization and field quality of a cosine-theta dipole magnet wound with coated conductors for rotating gantry for hadron cancer therapy | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Amemiya, Naoyuki
× Amemiya, Naoyuki× Sogabe, Yusuke× Sakashita, Masaki× Iwata, Yoshiyuki× Noda, Koji× Ogitsu, Toru× Ishii, Yusuke× Kurusu, Tsutomu× 雨宮 尚之× 岩田 佳之× 野田 耕司× 荻津 透 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Electromagnetic field analyses were carried out to study the influence of coated-conductor magnetisation, i.e. the screening (shielding) current, on the field quality of a dipole magnet in a rotating gantry for hadron cancer therapy. The analyses were made on the cross section of a cosine-theta dipole magnet in a rotating gantry for carbon ions, which generated 2.90 T of magnetic field. The temporal profile (temporal variation) of the magnet current was determined based on the actual excitation schemes of the magnets in the rotating gantry. The experimentally determined superconducting property of a coated conductor was considered, and we calculated the temporal evolutions of the current-density distributions in all the turns of coated conductors in the magnet. From the obtained current-density distributions, we calculated the multipole components of the magnetic field and evaluated the field quality of the magnet. The deviation in the dipole component from its designed value was up to approximately 25 mT, which was approximately 1% of the designed maximum dipole component. Its variation between repeated excitations was approximately 0.03%, and it drifted approximately 0.06% in 10 s. Some compensation schemes might be required to counteract such influence of magnetisation on the dipole component. Meanwhile, the higher multipole components were small, stable, and sufficiently reproducible for a magnet in rotating gantries, i.e. |b 3| ~ 1.1 × 10−3 and |Δb 3| ~ 0.2 × 10−3 in 10 s. | |||||
| 書誌情報 |
Superconductor Science and Technology 巻 29, 号 2, p. 024006-1-024006-14, 発行日 2015-12 |
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| 出版者 | ||||||
| 出版者 | IOP Science | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0953-2048 | |||||
