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アイテム
EXTRA DOSE REDUCTION BY OPTIMIZING RF-KO SLOW-EXTRACTION AT HIMAC
https://repo.qst.go.jp/records/54839
https://repo.qst.go.jp/records/54839ce22c53f-22fa-4721-ae47-7cb903da9cc9
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-02-20 | |||||
| タイトル | ||||||
| タイトル | EXTRA DOSE REDUCTION BY OPTIMIZING RF-KO SLOW-EXTRACTION AT HIMAC | |||||
| 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_5794 | |||||
| 資源タイプ | conference paper | |||||
| 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 |
水島, 康太
× 水島, 康太× 白井, 敏之× 古川, 卓司× 佐藤, 眞二× 岩田, 佳之× 野田, 耕司× 内山, 宙志× 藤澤, 高志× 水島 康太× 白井 敏之× 古川 卓司× 佐藤 眞二× 岩田 佳之× 野田 耕司× 藤澤 高志 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | A 3D scanning method gated with the patient's respiration has been developed for the HIMAC new treatment facility. The RF-knockout slow-extraction method has been used during scanning irradiation, because of the quick response to beam on/off switching from the synchrotron. However, a small amount of beam that remained just inside the separatrix spill out even without the transverse RF field, which brings the extra dose. We have proposed a method which applies another RF-frequency component matched with the betatron frequency of the 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; as a result, the extra dose can be also reduced. We measured it with an ion chamber, and could reduce to around 0.4 % compared to the original method. | |||||
| 書誌情報 |
Proceedings of PAC09, Vancouver, BC, Canada p. 1318-1320, 発行日 2009-05 |
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