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Relativistic plasma singularity and its coherent x-ray emission control using density jump
https://repo.qst.go.jp/records/66713
https://repo.qst.go.jp/records/667134730a980-bc59-4f42-b3c6-f5850934b515
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-03-26 | |||||
| タイトル | ||||||
| タイトル | Relativistic plasma singularity and its coherent x-ray emission control using density jump | |||||
| 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 |
ピロジコフ, アレキサンダー
× ピロジコフ, アレキサンダー× エシロケポフ, ティムル× 匂坂, 明人× 小倉, 浩一× 中新, 信彦× 黄, 開× A., Pikuz T.× Ya., Faenov A.× Namba, S.× 福田, 祐仁× コーガ, ジェームズ× 桐山, 博光× 近藤, 公伯× 河内, 哲哉× 神門, 正城× ピロジコフ アレキサンダー× エシロケポフ ティムル× 匂坂 明人× 小倉 浩一× 中新 信彦× 黄 開× 福田 祐仁× コーガ ジェームズ× 桐山 博光× 近藤 公伯× 河内 哲哉× 神門 正城 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We have discovered a new regime of bright coherent x-ray generation by relativistic plasma singularities driven by a multi-terawatt femtosecond laser focused onto a gas jet target [1]-[2]. The laser pulse propagates through the plasma, pushes electrons producing an electron-free cavity, and generates a bow wave [3]; singularities are produced at the joining of the cavity wall and the bow wave and represent point-like coherent x-ray emitters, which is a realization of Burst Intensification by Singularity Emitting Radiation (BISER) proposed in [4]. \nIn previous experiments, BISER occurred spontaneously, after the relativistic self-focusing, resulting in relatively large fluctuations of the x-ray source position and low overall stability. Based on simulations with the Particle-In-Cell (PIC) REMP code [5], we propose to control the BISER with a tailored plasma density profile. We demonstrate the BISER control employing a sharp plasma density jump generated by a shock in supersonic gas flow in experiments with the J-KAREN-P laser [6]-[7]. The induced BISER resulted in controllable x-ray source with low-jitter position and higher x-ray yield. Our results, on the one hand, represent an important step towards implementation of a next-generation bright compact coherent x-ray source, and on the other hand, demonstrate the new technique of relativistic self-focusing control and its diagnostics. \nWe thank the J-KAREN-P laser operation group and I. Daito for technical support. We acknowledge the financial support from JSPS Kakenhi JP 25390135 and JP 26707031. \n[1]A. S. Pirozhkov, et al., Phys. Rev. Lett. 108, 135004-5, (2012). [2]A. S. Pirozhkov et al., New J. Phys. 16, 093003-30 (2014). [3]T. Zh. Esirkepov, Y. Kato, and S. V. Bulanov, Phys. Rev. Lett. 101, 265001-4 (2008). [4]A. S. Pirozhkov, T. Zh. Esirkepov, et al., Scientific Reports 7, 17968 (2017). [5]T. Zh. Esirkepov, Comput. Phys. Comm. 135, 144-153 (2001). [6]H. Kiriyama, et al., IEEE J.S.T.Quantum Electron. 21, 1601118-18 (2015). [7]A. S. Pirozhkov, et al., Opt. Express 25, 20486-20501 (2017). |
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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 | JPS Spring Meeting | |||||
| 発表年月日 | ||||||
| 日付 | 2018-03-23 | |||||
| 日付タイプ | Issued | |||||
