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Control of Burst Intensification by Singularity Emitting Radiation
https://repo.qst.go.jp/records/73349
https://repo.qst.go.jp/records/7334981ff487a-9573-4568-a1f2-6b647c1da5e4
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-12-19 | |||||
| タイトル | ||||||
| タイトル | Control of Burst Intensification by Singularity Emitting Radiation | |||||
| 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× ゴンザレスイスケルド, ブルーノ× 中新, 信彦× 黄, 開× A, Pikuz T× 難波, 愼一× 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× ゴンザレスイスケルド ブルーノ× 中新 信彦× 黄 開× 難波 愼一× 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]-[3]. In this regime, the driving laser pulse propagates through the plasma, pushes electrons producing an electron-free cavity, and generates a bow wave [4]. The singularities are produced at the joining of the cavity wall and the bow wave and represent relativistically moving point-like coherent x-ray emitters. We have generalized this coherent radiation emission mechanism and discovered Burst Intensification by Singularity Emitting Radiation (BISER) [5]. \nIn previous experiments, BISER resulted from relativistic self-focusing, which is a laser beam instability. This spontaneous regime exhibited relatively large shot-to-shot fluctuations of the x-ray source position and low overall stability. However, stability is desirable for prospective applications of the new coherent x-ray source. \nBasing on simulations with the Particle-In-Cell code REMP [6], we proposed to control the BISER with a tailored plasma density profile. We demonstrated this control for the first time in experiments with the J-KAREN-P laser [7]-[9] using a sharp density jump created by a blade in the supersonic gas flow. This resulted in controllable, low-jitter x-ray source position and higher x-ray yield. \nOur 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. We acknowledge the financial support from JSPS Kakenhi JP 25390135, JP 26707031, and the QST Director Fund. \n[1]A. S. Pirozhkov, et al. "Soft-X-Ray Harmonic Comb from Relativistic Electron Spikes," Phys. Rev. Lett. 108, 135004 (2012). [2]A. S. Pirozhkov, et al., "High order harmonics from relativistic electron spikes," New J. Phys. 16, 093003 (2014). [3]T. Pikuz et al "High performance imaging of relativistic soft X-ray harmonics by sub-micron resolution LiF film detectors" Phys. Status Solidi C 9 2331 (2012) [4]T. Zh. Esirkepov, et al., "Bow Wave from Ultraintense Electromagnetic Pulses in Plasmas," Phys. Rev. Lett. 101, 265001 (2008). [5]A. Pirozhkov, T. Esirkepov et al., "Burst intensification by singularity emitting radiation in multi-stream flows," Sci. Rep. 7, 17968 (2017). [6]T. Esirkepov, "Exact charge conservation scheme for PIC simulation with an arbitrary form-factor," CPC 135, 144 (2001). [7]H. Kiriyama, et al., "High-Contrast, High-Intensity Petawatt-Class Laser and Applications," IEEE JSTQE 21, 1601118 (2015). [8]A. S. Pirozhkov, et al. "Approaching the diffraction-limited, bandwidth-limited Petawatt," Opt. Express 25, 20486 (2017). [9]H. Kiriyama, et al., "High-contrast high-intensity repetitive petawatt laser," Opt. Lett. 43, 2595 (2018). |
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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 | ICXRL 2018 | |||||
| 発表年月日 | ||||||
| 日付 | 2018-10-11 | |||||
| 日付タイプ | Issued | |||||
