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NUMERICAL ANALYSIS OF THE MEASUREMENT OF NEAR BEAM ELECTRON CLOUD DENSITY AT KEKB LOW ENERGY RING
https://ir.soken.ac.jp/records/2164
https://ir.soken.ac.jp/records/216482e4f850-17fd-4664-94c6-ff71c2100441
| 名前 / ファイル | ライセンス | アクション |
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要旨・審査要旨 (224.7 kB)
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本文 (6.0 MB)
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| Item type | 学位論文 / Thesis or Dissertation(1) | |||||
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| 公開日 | 2011-06-03 | |||||
| タイトル | ||||||
| タイトル | NUMERICAL ANALYSIS OF THE MEASUREMENT OF NEAR BEAM ELECTRON CLOUD DENSITY AT KEKB LOW ENERGY RING | |||||
| タイトル | ||||||
| タイトル | NUMERICAL ANALYSIS OF THE MEASUREMENT OF NEAR BEAM ELECTRON CLOUD DENSITY AT KEKB LOW ENERGY RING | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_46ec | |||||
| 資源タイプ | thesis | |||||
| 著者名 |
JAIN, PUNEET
× JAIN, PUNEET |
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| フリガナ |
ジェイン, プニート
× ジェイン, プニート |
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| 著者 |
JAIN, Puneet
× JAIN, Puneet |
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| 学位授与機関 | ||||||
| 学位授与機関名 | 総合研究大学院大学 | |||||
| 学位名 | ||||||
| 学位名 | 博士（理学） | |||||
| 学位記番号 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 総研大甲第1379号 | |||||
| 研究科 | ||||||
| 値 | 高エネルギー加速器科学研究科 | |||||
| 専攻 | ||||||
| 値 | 12 加速器科学専攻 | |||||
| 学位授与年月日 | ||||||
| 学位授与年月日 | 2010-09-30 | |||||
| 学位授与年度 | ||||||
| 値 | 2010 | |||||
| 要旨 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | A large number of electrons called an electron cloud are accumulated in beam chambers in positron storage rings. These electrons interact with the beam and can make it unstable. The density information of the electron cloud near the beam is therefore fundamental for studying the beam instabilities and mitigation techniques related to the electron cloud. Recently Kanazawa et al. proposed a method to measure the density of the electron cloud near the beam. The method measures high-energy electrons selectively by a retarding field analyzer located on a chamber wall, noting that the electrons near the beam get a strong kick by the beam. They calculated the density of the electron cloud simply assuming that the electrons that receive a kick are stationary. We examined the measurement technique by a new computer code developed by us. The analysis showed that the volume near the beam occupied by the detected electrons, i.e. the observed volume, was strongly deformed due to the horizontal velocity of the electrons and nevertheless the observed volume calculated assuming the stationary electrons can still be used for calculating the density of the electron cloud in their measurement conditions. The modeling of electron cloud generation in a field-free region of KEK B-Factory (KEKB) LER (Low Energy Ring), analysis of the measurement, comparison of the measured density with simulations and a possible improvement in the design of electron monitor are presented in details. |
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| 所蔵 | ||||||
| 値 | 有 | |||||
