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Transparent-grid scheme for generating cathode-emittance-dominated beams in a gridded thermionic gun
https://repo.qst.go.jp/records/81445
https://repo.qst.go.jp/records/814451a8f201f-4c13-4a7b-96b9-0be4b1510b29
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-12-25 | |||||
| タイトル | ||||||
| タイトル | Transparent-grid scheme for generating cathode-emittance-dominated beams in a gridded thermionic gun | |||||
| 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 |
安積, 隆夫
× 安積, 隆夫× 西森, 信行× 稲垣, 隆宏× 大竹, 雄次× 田中, 均× Asaka, Takao× Nishimori, Nobuyuki× Tanaka, Hitoshi |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | A transparent-grid scheme is proposed for generating cathode-emittance-dominated beams in a gridded thermionic gun. In the proposed scheme, the grid emittance arising from the potential difference between the grid and grid-mesh center is suppressed by tuning the grid voltage to the gridless gun potential. We developed a 50 kV gridded thermionic gun that is followed by a 238 MHz cavity for 500 kV acceleration. The measured projected emittance as a function of grid voltage shows a clear minimum approaching the cathode emittance and agrees well with a numerical simulation and a theoretical grid emittance taking into account the longitudinal space-charge effect. The measured minimum emittance for a core part which represents 60% of a 1-nC electron bunch is 1.5 μm centerdot rad making the transparent-gridded thermionic gun a promising electron source for high brightness beam application such as a soft X-ray free-electron laser. | |||||
| 書誌情報 |
Japanese Journal of Applied Physics 巻 60, 号 1, p. 017001-017006, 発行日 2020-12 |
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| 出版者 | ||||||
| 出版者 | 応用物理学会物理系学術誌刊行センター | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0021-4922 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.35848/1347-4065/abd0c9 | |||||
| 関連サイト | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.35848/1347-4065/abd0c9 | |||||
