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Reduction of uncontrollable spilled beam in RF-knockout slow extraction
https://repo.qst.go.jp/records/46268
https://repo.qst.go.jp/records/4626891edcae7-e135-4784-9419-4744f4e2ec28
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2012-02-23 | |||||
| タイトル | ||||||
| タイトル | Reduction of uncontrollable spilled beam in RF-knockout slow extraction | |||||
| 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 |
Mizushima, Kota
× Mizushima, Kota× Shirai, Toshiyuki× Furukawa, Takuji× Satou, Shinji× Iwata, Yoshiyuki× Noda, Kouji× Uchiyama, Hiroshi× 水島 康太× 白井 敏之× 古川 卓司× 佐藤 眞二× 岩田 佳之× 野田 耕司 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | A 3D-scanning irradiation method gated with the patient's respiration has been developed for the new Heavy Ion Medical Accelerator treatment facility in Chiba. The RF-knockout slow-extraction method has been used for fast on/off switching of the beam from the synchrotron during scanning irradiation. However, a small amount of beam that remained just inside the separatrix spilled out even without the transverse RF field, and limits the controllable low beam rate. We proposed to apply another transverse RF field with a frequency component matched with the betatron frequency of particles near the stopband in addition to the original transverse RF field.The particles just inside the separatrix can be selectively extracted during the irradiation, and the uncontrollable spilled beam can be suppressed. The spilled beam was measured with the ion chamber, and was reduced to 0.4% compared to th eoriginal method. |
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| 書誌情報 |
Nuclear Instruments & Methods in Physics Research Section A 巻 606, 号 3, p. 325-329, 発行日 2009-05 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0168-9002 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.nima.2009.05.154 | |||||
