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自己相似解で必要なプラズマ初期状態の電子密度・温度・速度場の時間・空間分解計測

研究課題

研究課題/領域番号 22KJ2443
補助金の研究課題番号 22J12063 (2022)
研究種目

特別研究員奨励費

配分区分基金 (2023)
補助金 (2022)
応募区分国内
審査区分 小区分14010:プラズマ科学関連
研究機関北海道大学 (2023)
九州大学 (2022)

研究代表者

PAN Yiming  北海道大学, 工学研究院, 特別研究員(PD)

研究期間 (年度) 2023-03-08 – 2024-03-31
研究課題ステータス 完了 (2023年度)
配分額 *注記
1,700千円 (直接経費: 1,700千円)
2023年度: 800千円 (直接経費: 800千円)
2022年度: 900千円 (直接経費: 900千円)
キーワードEUV light source / Laser plasma / Thomson scattering / トムソン散乱 / レーザープラズマ / プラスマ計測
研究開始時の研究の概要

Laser produced plasma(LPP) is generated by focusing a intense laser beam on the target.There is a growing interest in LPP as it concerns several prominent scientific and industrial applications. Despite the long history on the LPP research, experimental investigation on the dynamics of LPPs during and just after the laser irradiance have never been performed, which remains an important problem. This research is aiming at further our understanding on the LPP dynamics at this time window, by directly measure it with Collective Thomson scattering method.

研究実績の概要

For the two years contrast, I investigated the laser produced plasma (LPP) behaviors using collective Thomson scattering (CTS) with temporal and spatial resolution of 2 ns and 50μm, respectively, at the time during the drive laser irradiation. YAG laser at 1 μm wavelength is serving as the drive laser. In the first year Carbon-LPP was measured, and the isothermal expansion of the LPP was first confirmed experimentally. In this second year Tin is mainly investigated for it is responsible for emitting narrow-band extreme ultraviolet (EUV) light at 13.5 nm wavelength for nanolithography. The electron density and temperature of Sn LPP was shown in detail when it radiates EUV light, which information has long been wanted by the EUV community.
Furthermore, the corresponding EUV spectra irradiated by Sn LPP near 13.5 nm were also be measured simultaneously using a grazing incidence spectroscopy (GIS). This system can provide spatial-resolved EUV spectra in the target-normal direction.
The results from GIS, along with the measured density/temperature, could answer the core question for atomic physics: ions at what temperature and density radiate what spectra. In addition, my experiment enables the first experimental validation of an existing atomic model, JATOM.
Looking farther, this noval approach can provide a valuable experimental benchmark for existing atomic models, assisting the refinement of more accurate and predictive models in the future.

報告書

(2件)
  • 2023 実績報告書
  • 2022 実績報告書
  • 研究成果

    (8件)

すべて 2023 2022

すべて 雑誌論文 (3件) (うち国際共著 3件、 査読あり 3件) 学会発表 (5件) (うち国際学会 5件)

  • [雑誌論文] Thomson scattering measurements of electron temperature and electron density in laser-driven Gd plasmas2023

    • 著者名/発表者名
      Pan Yiming、Sunahara Atsushi、Namba Shinichi、Higashiguchi Takeshi、Tomita Kentaro
    • 雑誌名

      Journal of Physics D: Applied Physics

      巻: 56 号: 40 ページ: 405203-405203

    • DOI

      10.1088/1361-6463/ace36f

    • 関連する報告書
      2023 実績報告書
    • 査読あり / 国際共著
  • [雑誌論文] Joint measurement of electron density, temperature, and emission spectrum of Nd:YAG laser-produced tin plasma2023

    • 著者名/発表者名
      Pan Y.、Tomita K.、Sunahara A.、Sasaki A.、Nishihara K.
    • 雑誌名

      Applied Physics Letters

      巻: 123 号: 20 ページ: 204103-204103

    • DOI

      10.1063/5.0174185

    • 関連する報告書
      2023 実績報告書
    • 査読あり / 国際共著
  • [雑誌論文] Investigation of dynamics of laser-produced carbon plasma during the laser irradiation using collective Thomson scattering2022

    • 著者名/発表者名
      Pan Yiming、Tomita Kentaro、Yamagata Yukihiko、Sunahara Atsushi、Nishihara Katsunobu
    • 雑誌名

      Journal of Physics D: Applied Physics

      巻: 56 号: 2 ページ: 025201-025201

    • DOI

      10.1088/1361-6463/aca6f5

    • 関連する報告書
      2022 実績報告書
    • 査読あり / 国際共著
  • [学会発表] Collective Thomson scattering measurements of electron temperature and electron density in laser-driven EUV plasmas during the laser irradiation2023

    • 著者名/発表者名
      Y Pan, K Tomita, A Sunahara, K Nishihara
    • 学会等名
      20th International Symposium on Laser-Aided Plasma Diagnostics
    • 関連する報告書
      2023 実績報告書
    • 国際学会
  • [学会発表] Direct measurements of electron temperature and density in Gd laser-produced plasma during laser irradiation: laser intensity scaling of electron temperature2023

    • 著者名/発表者名
      Y Pan, A Sunahara, S Namba, T Higashiguchi, K Tomita
    • 学会等名
      The 12th Advanced Lasers and Photon Sources (ALPS2023),
    • 関連する報告書
      2023 実績報告書
    • 国際学会
  • [学会発表] Toward a direct comparison of measured and modeled EUV Spectra2023

    • 著者名/発表者名
      Y Pan, K Tomita, A Sunahara, A Sasaki, K Nishihara
    • 学会等名
      Source workshop 2023
    • 関連する報告書
      2023 実績報告書
    • 国際学会
  • [学会発表] Investigation of the early-stage dynamics of laser-produced plasma using collective Thomson scattering2022

    • 著者名/発表者名
      Pan Yiming、Tomita Kentaro、Sunahara Atsushi、Nishihara Katsunobu
    • 学会等名
      75th Gaseous Electronics Conference
    • 関連する報告書
      2022 実績報告書
    • 国際学会
  • [学会発表] Investigation of laser-produced plasma during the irradiation using collective Thomson scattering2022

    • 著者名/発表者名
      Pan Yiming、Tomita Kentaro
    • 学会等名
      2022 Source Workshop
    • 関連する報告書
      2022 実績報告書
    • 国際学会

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公開日: 2022-04-28   更新日: 2024-12-25  

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