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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 particular case of Burst Intensification by Singularity Emitting Radiation (BISER) [4].\nIn previous experiments, BISER occurred spontaneously, after the relativistic self-focusing, resulting in a relatively large fluctuations of the x-ray source position and low overall stability. Basing on simulations with the 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, low-jitter x-ray source position and higher x-ray yield. 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Control of Burst Intensification by Singularity Emitting Radiation (BISER) with density jump
https://repo.qst.go.jp/records/73348
https://repo.qst.go.jp/records/733485325b78a-24c5-4805-bb18-c798b2cd2900
Item type | 会議発表用資料 / Presentation(1) | |||||
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公開日 | 2018-12-19 | |||||
タイトル | ||||||
タイトル | Control of Burst Intensification by Singularity Emitting Radiation (BISER) with 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× 難波, 愼一× 大東, 出× 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× 難波 愼一× 大東 出× 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 particular case of Burst Intensification by Singularity Emitting Radiation (BISER) [4]. In previous experiments, BISER occurred spontaneously, after the relativistic self-focusing, resulting in a relatively large fluctuations of the x-ray source position and low overall stability. Basing on simulations with the 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, low-jitter x-ray source 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. We thank the J-KAREN-P laser operation group. We acknowledge the financial support from JSPS Kakenhi JP 25390135 and JP 26707031. \n[1]A. S. Pirozhkov, M. Kando, T. Zh. Esirkepov, P. Gallegos, H. Ahmed, E. N. Ragozin, A. Ya. Faenov, et al., "Soft-X-Ray Harmonic Comb from Relativistic Electron Spikes," Phys. Rev. Lett. 108, 135004-5, (2012). [2]A. Pirozhkov et al., "High order harmonics from relativistic electron spikes," New J. Phys. 16, 093003-30 (2014). [3]T. Zh. Esirkepov, Y. Kato, and S. V. Bulanov, "Bow Wave from Ultraintense Electromagnetic Pulses in Plasmas," Phys. Rev. Lett. 101, 265001-4 (2008). [4]A. S. Pirozhkov, T. Zh. Esirkepov, T. A. Pikuz, A. Ya. Faenov, K. Ogura, Y. Hayashi, H. Kotaki, et al., "Burst intensification by singularity emitting radiation in multi-stream flows," Scientific Reports (accepted). [5]T. Zh. Esirkepov, "Exact charge conservation scheme for Particle-in-Cell simulation with an arbitrary form-factor," Comput. Phys. Comm. 135, 144-153 (2001). [6]H. Kiriyama, M. Mori, A. S. Pirozhkov, K. Ogura, A. Sagisaka, A. Kon., et al., "High-Contrast, High-Intensity Petawatt-Class Laser and Applications," IEEE J.S.T.Quantum Electron. 21, 1601118-18 (2015). [7]A. S. Pirozhkov, Y. Fukuda, M. Nishiuchi, H. Kiriyama, A. Sagisaka, K. Ogura, M. Mori, M. Kishimoto, et al., "Approaching the diffraction-limited, bandwidth-limited Petawatt," 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 | OPIC-2018 (HEDS-2018) | |||||
発表年月日 | ||||||
日付 | 2018-04-24 | |||||
日付タイプ | Issued |