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Scaling of electron heating and proton acceleration to ultra-high intensities
https://repo.qst.go.jp/records/66879
https://repo.qst.go.jp/records/6687903c6c3a3-3d66-4778-8051-831b0eceb9f2
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-08-20 | |||||
| タイトル | ||||||
| タイトル | Scaling of electron heating and proton acceleration to ultra-high intensities | |||||
| 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× Kevin, Koga James× Sakaki, Hironao× Kondo, Kotaro× Fukuda, Yuuji× Kiriyama, Hiromitsu× Miyahara, Takumi× Nishitani, Keita× Ogura, Koichi× Pirozhkov, Alexander× Sagisaka, Akito× Kando, Masaki× Kondo, Kiminori× ドーバー ニコラス ピーター× 西内 満美子× コーガ ジェームズ× 榊 泰直× 近藤 康太郎× 福田 祐仁× 桐山 博光× 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-plasma interaction from solid targets, and the resultant ion generation, at the extreme intensities available at state-of-the-art laser facilities is an important topic for realising potential applications. We will present experimental data investigating electron heating and proton acceleration in a sheath field using the ultra-high intensity, high contrast J- KAREN-P laser. Using a 10 J, 40 fs pulse focused to an intensity ~5x1021 Wcm-2 resulted in generation of protons up to 40 MeV at 0.1 Hz from a 5 μm steel tape target. The high repetition rate of the tape target allowed large statistically relevant investigations into the scaling of the electron and proton beam with laser energy, pulse length and spot size. We demonstrate that the laser accelerated electron temperature depends not only on laser intensity but also on focal-spot size, in which the restriction of the transverse acceleration distance causes saturation of the electron temperature at increasingly small foci. However, the accelerated electron beam profile becomes more collimated and asymmetric with small focal spots. Measurements of the proton beam show only limited benefit to using increasingly small focal spot sizes, and the best scaling for achieving higher maximum proton energies from sheath acceleration is achieved with increasing the pulse energy, rather than reducing the spot size or pulse length. |
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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 | AAC 2018 | |||||
| 発表年月日 | ||||||
| 日付 | 2018-08-14 | |||||
| 日付タイプ | Issued | |||||
