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Experimental investigation of laser-driven proton sheath acceleration in the ultra-short pulse, ultra-high intensity regime
https://repo.qst.go.jp/records/66606
https://repo.qst.go.jp/records/66606d07e6403-cdd6-4341-afe2-b59c6cbc143f
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-01-31 | |||||
| タイトル | ||||||
| タイトル | Experimental investigation of laser-driven proton sheath acceleration in the ultra-short pulse, ultra-high intensity regime | |||||
| 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 |
ドーバー, ニコラスピーター
× ドーバー, ニコラスピーター× Nishiuchi, Mamiko× Sakaki, Hironao× Kondo, Kotaro× Alkhimova, M.A.× Ya., Faenov A.× Fukuda, Yuuji× Hata, M.× Iwata, N.× Kiriyama, Hiromitsu× Kevin, Koga James× Miyahara, Takumi× Nishitani, Keita× Ogura, Koichi× Pikuz, T.A.× Pirozhkov, Alexander× Sagisaka, Akito× Sentoku, Y.× Watanabe, Y.× Kando, Masaki× Kondo, Kiminori× ドーバー ニコラス ピーター× 西内 満美子× 榊 泰直× 近藤 康太郎× 福田 祐仁× 桐山 博光× コーガ ジェームズ× 宮原 巧× 西谷 勁太× 小倉 浩一× ピロジコフ アレキサンダー× 匂坂 明人× 神門 正城× 近藤 公伯 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The behaviour of high power laser driven ion generation at the extreme intensities available at state-of-the-art and next-generation laser facilities is an important topic for realising potential applications. One of the simplest schemes for proton sources for applications is sheath acceleration, for which different established models predict varying dependence on laser and target parameters, motivating experimental investigation. We will present experimental data investigating sheath driven proton acceleration using the ultra-high intensity, high contrast J-KAREN-P laser. A ~10 J, 40 fs pulse was focused to an intensity ~5x1021 Wcm-2, generating protons up to 50 MeV from freestanding ~μm foils, and up to 40 MeV at 0.1 Hz from a 5 μm tape target, with conversion efficiencies >1% into protons above 10 MeV. Scaling with different methods of laser intensity variation will be discussed. Simultaneous measurement of the electron distribution and optical probing of plasma formation on the rear target surface provide insights into electron absorption. In particular, target irradiation at 45º angle of incidence is shown to produce a systematic asymmetry in both rear surface sheath formation and resultant proton distribution due to the initial non-thermal electron distribution, causing the highest energy protons to be steered partly towards the laser axis. |
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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 | EAAC2017参加 | |||||
| 発表年月日 | ||||||
| 日付 | 2017-09-25 | |||||
| 日付タイプ | Issued | |||||
