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Source of spill ripple in the RF-KO slow-extraction method with FM and AM
https://repo.qst.go.jp/records/49142
https://repo.qst.go.jp/records/49142d8a81981-8569-45ef-a50a-39748d250d33
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-08-09 | |||||
| タイトル | ||||||
| タイトル | Source of spill ripple in the RF-KO slow-extraction method with FM and AM | |||||
| 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 |
野田, 耕司
× 野田, 耕司× noda× 古川, 卓司× furukawa× 渋谷, 真二× shibuya× 村松, 正幸× muramatsu× 上杉, 智教× uesugi× 金澤, 光隆× kanazawa× 取越, 正己× torikoshi× 高田, 栄一× takada× 山田, 聰× Noda, Koji× Furukawa, Takuji× Shibuya, Shinnji× Muramatsu, Masayuki× Uesugi, Tomonori× Kanazawa, Mitsutaka× Torikoshi, Masami× Takada, Eiichi× Yamada, Satoru |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The RF-knockout (RF-KO) slow-extraction method with frequency modulation (FM) and amplitude modulation (AM) has brought high-accuracy irradiation to the treatment ofa cancer tumor moving with respiration, because of a quick response to beam start/stop. However, a beam spill extracted from a synchrotron ring through RF-KO slowextraction has a huge ripple with a frequency of around 1 kHz related to the FM. The spill ripple will disturb the lateral dose distribution in the beam scanning methods. Thus, the source ofthe spill ripple has been investigated through experiments and simulations. There are two tune regions for the extraction process through the RF-KO method: the extraction region and the diffusion region. The particles in the extraction region can be extracted due to amplitude growth through the transverse RF field, only when its frequency matches with the tune in the extraction region. For a large chromaticity, however, the particles in the extraction region can be extracted through the synchrotron oscillation, even when the frequency does not match with the tune in the extraction region. Thus, the spill structure during one period ofthe FM strongly depends on the horizontal chromaticity. They are repeated with the repetition frequency of the FM, which is the very source ofthe spill ripple in the RF-KO method. |
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| 書誌情報 |
Nuclear Instruments and Methods in Physics Research A 巻 492, p. 241-252, 発行日 2002-10 |
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| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| 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/S0168-9002(02)01318-9 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.sciencedirect.com/science/article/pii/S0168900202013189 | |||||
