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Muti-MeV proton beams accelerated by Coulomb explosion of micron-size hydrogen clusters
https://repo.qst.go.jp/records/73156
https://repo.qst.go.jp/records/73156e685332c-ac14-4f1e-9f8e-d80d8cf6cd45
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-01-21 | |||||
| タイトル | ||||||
| タイトル | Muti-MeV proton beams accelerated by Coulomb explosion of micron-size hydrogen clusters | |||||
| 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_c94f | |||||
| 資源タイプ | conference object | |||||
| 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 |
福田, 祐仁
× 福田, 祐仁× 金崎, 真聡× 神野, 智史× ピロジコフ, アレキサンダー× 匂坂, 明人× 小倉, 浩一× 宮坂, 泰弘× 中新, 信彦× 宇野, 雅貴× 高野, 雄太× 森井, 厚作× 浅井, 孝文× 坂本, 渓太× 清水, 和輝× 森島, 邦博× 小平, 聡× 岡本, 祐樹× 松井, 隆太郎× 岸本, 泰明× 小田, 啓二× 山内, 知也× 上坂, 充× 近藤, 公伯× 河内, 哲哉× 神門, 正城× 桐山, 博光× 福田 祐仁× ピロジコフ アレキサンダー× 匂坂 明人× 小倉 浩一× 宮坂 泰弘× 中新 信彦× 宇野 雅貴× 高野 雄太× 森井 厚作× 浅井 孝文× 坂本 渓太× 清水 和輝× 小平 聡× 岡本 祐樹× 松井 隆太郎× 近藤 公伯× 河内 哲哉× 神門 正城× 桐山 博光 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Laser-driven ion acceleration has been one of the most active areas of research over approximately the past decade, because accelerated multi-MeV ion beams have unique properties that can be employed in a broad range of applications. From a view point of practical applications, high-purity proton beams with high reproducibility are quite advantageous. In experiments using thin foil targets, however, protons from surface contaminants along with the high-z component materials are accelerated together, making the production of impurity-free proton beams unrealistic. Here we introduce a micron-size hydrogen cluster (composed of 10^8-10 hydrogen molecules) as a target to generate impurity-free, highly-reproducible, and robust multi-MeV proton beams. Because of the recent progress in intense laser technology, the advanced PW class lasers can now achieve intense laser fields around 10^22 W/cm^2; with such fields, all the electrons inside the micron-size hydrogen cluster can be fully stripped off, resulting in a pure Coulomb explosion with a pronounced increase in accelerated maximum proton energies By using the micron-size hydrogen cluster target, we have conducted ion acceleration experiments with the 0.1 Hz PW class J-KAREN laser at QST-KPSI . In order to characterize the accelerated ions, we used nuclear track detector plates (CR-39), nuclear emulsion plates, and a real-time Thomson parabola equipped with a micro-channel plate (MCP), a phosphor screen, and a CCD camera. We found that only protons having the maximum energy of ~12 MeV, consistent with the theoretical prediction, were accelerated at a laser focused intensity of 1×10^20 W/cm^2. Based on the experimental results, the detailed ion acceleration mechanism by Coulomb explosion of clusters is discussed with the help from numerical simulations using a particle-in-cell (PIC) method. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 12th International Conference on High Energy Density Laboratory Astrophysics | |||||
| 発表年月日 | ||||||
| 日付 | 2018-05-28 | |||||
| 日付タイプ | Issued | |||||
