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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 | |||||
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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, n.d., Muti-MeV proton beams accelerated by Coulomb explosion of micron-size hydrogen clusters.
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