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X-ray spectroscopy evidence of solid-density ultra-relativistic laser plasma in renewable micron-scale cryogenic clusters targets
https://repo.qst.go.jp/records/82796
https://repo.qst.go.jp/records/82796962e6e95-6c8b-4098-9607-b4ee71b85525
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-04-13 | |||||
| タイトル | ||||||
| タイトル | X-ray spectroscopy evidence of solid-density ultra-relativistic laser plasma in renewable micron-scale cryogenic clusters targets | |||||
| 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 |
N. Ryazantsev, S.
× N. Ryazantsev, S.× A. Pikuz, T.× A. Pikuz, S.× Kaji, T.× Tanabe, H.× Nakagawa, T.× Takafumi, Asai× Kanasaki, M.× Oda, K.× Yamauchi, T.× Jinno, S.× Taguchi, T.× K. Himeno× Iwasaki, K.× Hihara, T.× Sakai, K.× Minami, T.× Abe, Y.× Tokiyasu, A.× Kohri, H.× Kuramitsu, Y.× Sakawa, Y.× Yasuhiro, Miyasaka× Kotaro, Kondo× Akira, Kon× Akito, Sagisaka× Koichi, Ogura× Pirozhkov, Alexander× Masaki, Kando× Kiminori, Kondo× Tetsuya, Kawachi× Hiromitsu, Kiriyama× Yuji, Fukuda× Takafumi, Asai× Yasuhiro, Miyasaka× Kotaro, Kondo× Akira, Kon× Akito, Sagisaka× Koichi, Ogura× Pirozhkov, Alexander× Masaki, Kando× Kiminori, Kondo× Tetsuya, Kawachi× Hiromitsu, Kiriyama× Yuuji, Fukuda |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Recently it was shown that injection of gas preliminary cooled down to cryogenic temperatures is a promising way to produce micron-scale clusters. For example, in hydrogen clusters with the size up to ≈2 μm were produced via a conical nozzle at 25 K, 6 MPa. Micron scale clusters can be also created with another pre-cooled gases, for example Ar or Kr, but for other temperature values. So large clusters diameter value becomes comparable with a waist width of a laser beam produced by the J-KAREN-P laser facility. As a result, an experimental case can occur, when most of the laser energy is absorbed in a single cluster. Such situation can be considered as an interaction of a laser pulse with matter, state of which is close to solid-state. In the presentation plasma X-ray spectra features indicating the described case of high-intensity laser and large-scale-cluster interaction are discussed. They were observed experimentally during irradiation of cryogenic (T = 140 K – 220 K) Ar flows by ultra-intensive (I = 10^22 W/cm^2) femtosecond laser pulses generated by the J-KAREN-P laser. Registered X-ray spectra of produced plasma contains Ar XVIII Ly-α and Ar XVII He-α of comparable intensities. It should be noted that the Ar XVIII Ly-α line has been for the first time observed in laser-matter interaction experiments. It indicates that the density of irradiated matter is high enough to provide a rate of impact ionization process, which is sufficient to create a significant amount of H-like Ar ions. It is a challenge to reach such condition for a pure gas or small clusters. Thus, the observed spectra are considered as an evidence of a large micron cluster existing in the beam waist region. |
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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 | International Conference on High Energy Density Sciences (HEDS2021) | |||||
| 発表年月日 | ||||||
| 日付 | 2021-04-19 | |||||
| 日付タイプ | Issued | |||||
