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Effect of small focus on electron heating and proton acceleration in ultra-relativistic laser-solid interactions
https://repo.qst.go.jp/records/76035
https://repo.qst.go.jp/records/760358fb17e77-c802-4c64-86ea-d282edacf76f
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-05-29 | |||||
| タイトル | ||||||
| タイトル | Effect of small focus on electron heating and proton acceleration in ultra-relativistic laser-solid interactions | |||||
| 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× Dover, NicholasPeter |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | State-of-the-art high power laser facilities present numerous potential applications, including the generation of ultra-short and low emittance ion beams. Understanding the underlying laser-plasma interaction physics and resulting scaling to ultra-high intensities is of great importance for optimising such sources. We therefore present experimental data of proton acceleration in a sheath field using the ultra-high intensity J-KAREN-P laser (10 J, 40 fs, 5x1021 W/cm2), allowing investigation at the high-intensity frontier. A repetitive tape target was used to generate proton beams at a 0.1 Hz repetition rate limited only by the laser, allowing a systematic and comprehensive scan over laser parameters. Our laser-target system is able to regularly produce protons in excess of 40 MeV at the full repetition rate. We will demonstrate a slower than expected increase in proton energy with decreasing focal spot size, show that this is due to a reduced sheath lifetime for tight focal spots, and propose a new model which successfully predicts proton energies over a large range of focal spot sizes. |
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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 | OPTO2019 | |||||
| 発表年月日 | ||||||
| 日付 | 2019-06-12 | |||||
| 日付タイプ | Issued | |||||
