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Investigation of the relationship between the conditions of High-Z ionised plasma production and radiation spectra using collective Thomson scattering.

Research Project

Project/Area Number 20H01880
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 14010:Fundamental plasma-related
Research InstitutionHokkaido University

Principal Investigator

Tomita Kentaro  北海道大学, 工学研究院, 准教授 (70452729)

Co-Investigator(Kenkyū-buntansha) 砂原 淳  大阪大学, レーザー科学研究所, 招へい准教授 (00370213)
西原 功修  大阪大学, レーザー科学研究所, 名誉教授 (40107131)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2022: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2021: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2020: ¥12,610,000 (Direct Cost: ¥9,700,000、Indirect Cost: ¥2,910,000)
Keywordsトムソン散乱 / レーザー生成プラズマ / 電子温度 / 電子密度 / 軟X線 / EUV / トムソン散乱計測 / 軟X線光源 / EUV光源 / 協同トムソン散乱
Outline of Research at the Start

レーザー生成多価電離プラズマの電子密度、電子温度、イオン温度、平均イオン価数の2次元空間分布・時間変化計測を協同的トムソン散乱のイオン項・電子項を同時計測することで行う。計測は申請者らが開発した差分散型6回折格子分光器およびこれから開発する偏光分離分光器を用いて行う。軟X線や極端紫外線光源用プラズマを想定し、ターゲット元素、レーザーパワー密度を変更した計測を実施する。X線CCDカメラによる波長1-20 nm範囲の放射スペクトルを計測する。以上により、これまで不明確であったプラズマ生成条件と放射スペクトル分布を、プラズマパラメータを媒介として定量的に関連付けられるようにする。

Outline of Final Research Achievements

In-situ measurements of the two-dimensional spatial profiles and time evolution of the electron density, electron temperature, averaged ionic charge, and velocity field of laser-produced plasmas (LPPs) were successfully performed using the collective Thomson scattering technique. These measurements were carried out mainly on a solid carbon target, which is relatively easy to measure. Based on these results, Thomson scattering measurements were performed to a Gd target, which is expected to be a light source in the 6 nm wavelength band, and where the high laser power density of the Gd plasma is expected to realise high temperature conditions. The energy loss due to pressure gradients (expansion loss) is expected to increase. From an engineering point of view, it is important to clarify the relationship between the input laser power and the electron temperature. We cralified the relations.

Translated with www.DeepL.com/Translator (free version)

Academic Significance and Societal Importance of the Research Achievements

軟X線およびEUV領域における半導体露光光源として、レーザー生成プラズマ光源の開発は重要である。そこでは不透明なプラズマが、非一様・非定常に存在している。光の発生や輸送過程はプラズマの密度・温度で決定されるため、光源プラズマ内の密度・温度計測は現象把握に必須項目でありながら、計測が技術的に困難であり達成されてこなかった。本研究ではそれを打破できる新たな協同的トムソン散乱システムを基軸として、レーザープラズマの密度・温度だけでなく、流体運動で重要な速度場をも実計測可能とした点で学術的な意義は大きい。さらに実用的な軟X線光源について、投入レーザー強度と電子温度の関係を明らかにした点も意義がある。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (16 results)

All 2022 2021 2020

All Journal Article (7 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 7 results,  Open Access: 3 results) Presentation (9 results) (of which Int'l Joint Research: 9 results,  Invited: 6 results)

  • [Journal Article] Investigation of dynamics of laser-produced carbon plasma during the laser irradiation using collective Thomson scattering2022

    • Author(s)
      Pan Yiming、Tomita Kentaro、Yamagata Yukihiko、Sunahara Atsushi、Nishihara Katsunobu
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 56 Issue: 2 Pages: 025201-025201

    • DOI

      10.1088/1361-6463/aca6f5

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Feasibility study on reactive ion etching occurrence in EUV-induced photoionized hydrogen plasmas based on electron temperature and electron density measurements.2022

    • Author(s)
      Kouichiro Kouge, Kentaro Tomita, Junya Hotta, Yiming Pan, Hiroaki Tomuro, Tatsuya Yanagida, Kiichiro Uchino, Naoji Yamamoto.
    • Journal Title

      Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers

      Volume: accepted Issue: 5 Pages: 1-1

    • DOI

      10.35848/1347-4065/ac5d25

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Functional nitrogen science based on plasma processing: quantum devices, photocatalysts and activation of plant defense and immune systems2021

    • Author(s)
      Kaneko Toshiro、Kato Hiromitsu、Yamada Hideaki、Yamamoto Muneaki、Yoshida Tomoko、Attri Pankaj、Koga Kazunori、Murakami Tomoyuki、Kuchitsu Kazuyuki、Ando Sugihiro、Nishikawa Yasuhiro、Tomita Kentaro、Ono Ryo、Ito Tsuyohito、Ito Atsushi M.、Eriguchi Koji、Nozaki Tomohiro、Tsutsumi Takayoshi、Ishikawa Kenji
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: SA Pages: SA0805-SA0805

    • DOI

      10.35848/1347-4065/ac25dc

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Time-resolved spatial profiles of electron density and temperature in hydrogen plasmas induced by radiation from laser-produced tin plasmas for extreme ultraviolet lithography light sources2021

    • Author(s)
      Kouge Kouichiro、Tomita Kentaro、Hotta Junya、Pan Yiming、Tomuro Hiroaki、Morita Masayuki、Yanagida Tatsuya、Uchino Kiichiro、Yamamoto Naoji
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 60 Issue: 6 Pages: 066002-066002

    • DOI

      10.35848/1347-4065/abfadc

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Time-resolved two-dimensional measurements of the electron density, electron temperature, and drift velocity of laser-produced carbon plasmas using the ion feature of collective laser Thomson scattering2021

    • Author(s)
      Pan Yiming、Tomita Kentaro、Uchino Kiichiro、Sunahara Atsushi、Nishihara Katsunobu
    • Journal Title

      Applied Physics Express

      Volume: 14 Issue: 6 Pages: 066001-066001

    • DOI

      10.35848/1882-0786/abfeca

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Local plasma parameter measurements in colliding laser-produced plasmas for studying magnetic reconnection2020

    • Author(s)
      Morita T.、Tomita K.、Sakai K.、Takagi M.、Aihara K.、Edamoto M.、Egashira S.、Higuchi T.、Ishizaka N.、Izumi T.、Kakuchi S.、Kojima T.、Kuramitsu Y.、Matsukiyo S.、Nakagawa Y.、Minami T.、Murakami H.、Nishioka Y.、Ota M.、Sano T.、Sei S.、Sugiyama K.、Tanaka S.J.、Yamazaki R.、Sakawa Y.
    • Journal Title

      High Energy Density Physics

      Volume: 36 Pages: 100754-100754

    • DOI

      10.1016/j.hedp.2020.100754

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Collective Thomson scattering in non-equilibrium laser produced two-stream plasmas2020

    • Author(s)
      K. Sakai, et al, Y. Sakawa, et al
    • Journal Title

      Physics of Plasmas

      Volume: 27 Issue: 10 Pages: 103104-103104

    • DOI

      10.1063/5.0011935

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Investigation of the early-stage dynamics of laser-produced plasma using collective Thomson scattering2022

    • Author(s)
      Yiming Pan , Kentaro Tomita, Atsushi Sunahara, Katsunobu Nishihara
    • Organizer
      Gaseous Electronics Conference 2022, Sendai, Japan, 2022.10
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] "Investigation of laser-produced plasma during the irradiation using collective Thomson scattering"2022

    • Author(s)
      Yiming Pan , Kentaro Tomita,
    • Organizer
      EUV source workshop, Online, 2022.10
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of early-time dynamics of laser-produced carbon plasma by collective Thomson scattering2022

    • Author(s)
      Yiming Pan , Kentaro Tomita, Atsushi Sunahara, Katsunobu Nishihara
    • Organizer
      ALPS2022, Online, 2022.4
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Observation of plasma inflow in laser-produced Sn EUV sources contributing to increment of EUV light output using Thomson scattering technique2022

    • Author(s)
      Kentaro Tomita, Yiming Pan, Atsushi Sunahara, Katsunobu Nishihara
    • Organizer
      EUV source workshop, Online, 2022.10
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Observation of two-dimensional plasma flows toward higher temperature regions in laser produced tin plasmas for extreme ultraviolet (EUV) light sources2022

    • Author(s)
      Kentaro Tomita, Yiming Pan, Atsushi Sunahara, Katsunobu Nishihara
    • Organizer
      14th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nanomaterials (ISPlasma2022)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Thomson scattering studies of atmospheric-air streamer discharges and Extreme-ultraviolet (EUV) light sources2022

    • Author(s)
      Kentaro Tomita
    • Organizer
      The 39th Symposium on Plasma Processing (SPP-39)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent progress of laser Thomson scattering studies for industrial plasmas -Measurements of EEDF of air-streamer discharge and 2D velocity field in laser produced EUV sources-2021

    • Author(s)
      Kentaro Tomita
    • Organizer
      The 12th Asia-Pacific International Symposium on the Basics and Applications of Plasma Technology (APSPT-12)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Thomson scattering diagnostics of a streamer discharge in atmospheric-pressure air and laser-produced plasmas for light sources2020

    • Author(s)
      Kentaro Tomita
    • Organizer
      The 73rd Annual Gaseous Electronics Conference
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent Diagnostics Results of EUV Source and EUV Induced Plasmas2020

    • Author(s)
      Kentaro Tomita
    • Organizer
      2020 Source Workshop
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited

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Published: 2020-04-28   Modified: 2024-01-30  

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