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Development of plasma window for vacuum interface and its application to quantum beam science

Research Project

Project/Area Number 20H00141
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 14:Plasma science and related fields
Research InstitutionHiroshima University

Principal Investigator

難波 愼一  広島大学, 先進理工系科学研究科(工), 教授 (00343294)

Co-Investigator(Kenkyū-buntansha) 奥野 広樹  国立研究開発法人理化学研究所, 仁科加速器科学研究センター, 副部長 (70280716)
岸本 牧  国立研究開発法人量子科学技術研究開発機構, 量子生命科学研究所, 上席研究員 (40360432)
Project Period (FY) 2020-04-01 – 2025-03-31
Project Status Granted (Fiscal Year 2024)
Budget Amount *help
¥45,370,000 (Direct Cost: ¥34,900,000、Indirect Cost: ¥10,470,000)
Fiscal Year 2024: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2023: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2022: ¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
Fiscal Year 2021: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2020: ¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Keywordsプラズマウィンドウ / アークプラズマ / 真空インターフェース / 超高密度プラズマ源 / プラズマ発光分光 / トムソン散乱計測 / 超高温高密度プラズマ源 / 大気中電子ビーム溶接 / バーチャル真空インターフェース / 超高温高密度プラズマ
Outline of Research at the Start

金属のように大気と真空を隔てる圧力隔壁となるが,荷電粒子や光は自由に通過できる物質は存在しないのであろうか? これを解決するのがプラズマウィンドウである.
このプラズマウィンドウが実用化すれば,大気中での電子ビーム溶接・微細加工,大気中の生きた細胞の内部構造をナノメートル空間分解でイメージングできる革新的真空技術を提供できる.一方,プラズマウィンドウは差動排気として機能するため,イオン加速器の多価イオン化ガスセルに適用すれば差動排気系の小型化やビームの大口径化が可能になる.高強度・大口径ビームである次期大型イオン加速器の多価イオン発生の基盤要素技術としてプラズマウィンドウは貢献できる.

Outline of Annual Research Achievements

2023年度は小口径,大口径プラズマウィンドウの放電部をより耐久性の高いものに改良することを行った.また,陰極部は従来の直熱型加熱から傍熱型加熱へと完全移行し,放電が短時間で安定して開始できるようにした.大口径プラズマウィンドウの装置開発はほぼ終えているが,小口径プラズマウィンドウは中間電極の除熱が未だ十分でなく,無酸素銅を材料とするものに変更し,陰極も熱的に耐えられるような装置を見直して設計し,2024年6月に装置が納入される予定である.
プラズマ特性を評価するために,これまでの可視分光計測に加え,真空紫外分光,及び,トムソン散乱計測を新たに導入した.真空紫外分光ではプラズマ内,及び,周辺部ガスの輻射捕獲に関する基礎研究を行うことができ,衝突輻射モデルにおける線強度比法を用いた電子密度,温度決定に関する基調は情報を得ることができた.この成果をPhys.Plasmas誌にて報告した.一方,トムソン散乱計測ではトリプル分光器を自作し,陰極周辺部と陽極出口の電子密度・温度を計測することに成功した.具体的には大口径8mmプラズマウィンドウでは2~3eV, 10^14/cc以上のヘリウムプラズマが発生していることが分かった.これらの値は可視分光で得られた値と一致するため,プラズマパラメータのクロスチェックが可能になった.更に,計測されたプラズマパラメータからどの程度の中性粒子が加熱されているかが評価でき,ガス粘性をより高めるための指針を得ることができた.この成果はJ. Appl. Phys誌にて報告した.

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

大口径プラズマウィンドウでは目標とするプラズマ特性をほぼ実現でき,圧力隔壁性能も45分であるが達成することができた.一方,小口径プラズマウィンドウでも高い圧力隔壁が形成されたが,極めて高い熱負荷に長時間耐えられなかった,そのため装置の大幅な改良を行った.この装置が納品されるのが6月であり,このプラズマウィンドウを用いて連続長時間運転を試みる.したがって,計画はおおむね順調に進んでいると評価した.

Strategy for Future Research Activity

2024年6月までに大口径,小口径プラズマウィンドウの製作がすべて完了するので,まずは両装置で目標とする圧力隔壁が長時間維持できるのかを確認する.その後,プラズマウィンドウ内に電子ビームを入射する実験を行う.電子ビームは30kVの電子ビーム源を整備したので,放電部陽極出口側から電子ビームを入射し,陰極側に設置されたステンレスまで電子が到達するか調べる.その後,アインツェルレンズを用いて電子ビームを上下左右に振ることでステンレス母材が加工できることを実証する.

Report

(5 results)
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Comments on the Screening Results   Annual Research Report
  • Research Products

    (66 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (8 results) Journal Article (21 results) (of which Int'l Joint Research: 10 results,  Peer Reviewed: 21 results,  Open Access: 7 results) Presentation (33 results) (of which Int'l Joint Research: 29 results,  Invited: 5 results) Remarks (4 results)

  • [Int'l Joint Research] ウィーン工科大学(オーストリア)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] カタルーニャ工科大(スペイン)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] ウィーン工科大学(オーストリア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] カタルーニャ工科大学(スペイン)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] ウィーン工科大学(オーストリア)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] カタリューナ工科大学(スペイン)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] ウィーン工科大学(オーストリア)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] カタルーニャ工科大学(スペイン)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Spectral Shift and Split of Harmonic Lines in Propagation Affected High Harmonic Generation in a Long-Interaction Gas Tube2023

    • Author(s)
      Seres Jozsef、Seres Enikoe、Serrat Carles、Dinh Thanh-Hung、Hasegawa Noboru、Ishino Masahiko、Nishikino Masaharu、Namba Shinichi
    • Journal Title

      Atoms

      Volume: 11 Issue: 12 Pages: 150-150

    • DOI

      10.3390/atoms11120150

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Development of a large-bore plasma window with an indirectly heated hollow cathode2023

    • Author(s)
      Yamasaki K.、Sumino M.、Sunada Y.、Yanagi O.、Okuda K.、Kono J.、Saito A.、Mori D.、Tomita K.、Pan Y.、Tamura N.、Suzuki C.、Okuno H.、Guo F.、Namba S.
    • Journal Title

      Journal of Applied Physics

      Volume: 134 Issue: 9

    • DOI

      10.1063/5.0166798

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Optimization of extreme ultra-violet light emitted from the CO2 laser-irradiated tin plasmas using 2D radiation hydrodynamic simulations2023

    • Author(s)
      Sunahara Atsushi、Hassanein Ahmed、Tomita Kentaro、Namba Shinichi、Higashiguchi Takeshi
    • Journal Title

      Optics Express

      Volume: 31 Issue: 20 Pages: 31780-31780

    • DOI

      10.1364/oe.497282

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Water-window x-ray emission from laser-produced Au plasma under optimal target thickness and focus conditions2023

    • Author(s)
      Wang Jiahao、Kishimoto Maki、Jozaki Tomoyuki、Kumeda Tomohiro、Higashiguchi Takeshi、Sunahara Atsushi、Ohiro Hikari、Yamasaki Kotaro、Namba Shinichi
    • Journal Title

      Physical Review E

      Volume: 107 Issue: 6 Pages: 065211-065211

    • DOI

      10.1103/physreve.107.065211

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Generation of stationary high-density cascade arc plasma and application to plasma windows2023

    • Author(s)
      Yamasaki K.、Yanagi O.、Sunada Y.、Okuda K.、Saito A.、Kono J.、Mori D.、Tamura N.、Okuno H.、Namba S.
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 62 Issue: SL Pages: SL1009-SL1009

    • DOI

      10.35848/1347-4065/acd55e

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Generation of Highly Charged Au Ion in Laser-Produced Plasma for Water Window X-ray Radiation Sources2022

    • Author(s)
      Wang Jiahao、Kishimoto Maki、Johzaki Tomoyuki、Mizushima Kairi、Kumeda Chihiro、Higashiguchi Takeshi、Sunahara Atsushi、Ohiro Hikari、Yamasaki Kotaro、Namba Shinichi
    • Journal Title

      Atoms

      Volume: 10 Issue: 4 Pages: 150-150

    • DOI

      10.3390/atoms10040150

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Evaluation of self-absorption effect of He I resonance line by measurement of forbidden emission in helium arc jet plasma2022

    • Author(s)
      Shigesada Ryo、Islam Md. Anwarul、Kawazome Hayato、Okuda Kosuke、Sunada Yuta、Yanagi Ohshi、Sumino Masato、Hatta Kazuho、Tamura Naoki、Yamasaki Kotaro、Kawata Jun、Namba Shinichi
    • Journal Title

      Physics of Plasmas

      Volume: 29 Issue: 11 Pages: 113505-113505

    • DOI

      10.1063/5.0109171

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Enhancement of Gain Coefficient of Li-Like Ion 3d-4f Soft X-ray Laser Oscillation by a Single Resonator2022

    • Author(s)
      Namba Shinichi、Wang Jiahao、Ohiro Hikari、Zhang Jiawei、Kishimoto Maki、Yamasaki Kotaro、Hasegawa Noboru、Dinh Thanhhung、Ishino Masahiko、Higashiguchi Takeshi、Nishikino Masaharu
    • Journal Title

      Atoms

      Volume: 10 Issue: 4 Pages: 128-128

    • DOI

      10.3390/atoms10040128

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Discharge characteristics of steady-state high-density plasma source based on cascade arc discharge with hollow cathode2022

    • Author(s)
      Yamasaki K.、Yanagi O.、Sunada Y.、Hatta K.、Shigesada R.、Sumino M.、Yamaguchi T.、Islam Md. Anwarul、Tamura N.、Okuno H.、Namba S.
    • Journal Title

      Review of Scientific Instruments

      Volume: 93 Issue: 5 Pages: 053502-053502

    • DOI

      10.1063/5.0076388

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Construction of a Magnetic Bottle Electron Spectrometer for Electron Energy Measurement in BISER X-Rays and Xe Interaction2022

    • Author(s)
      Hikari OHIRO, Alexander S. PIROZHKOV, Koichi OGURA, Akito SAGISAKA, Tatiana A. PIKUZ, Kai HUANG, Masaki KANDO, Kotaro YAMASAKI and Shinichi NAMBA
    • Journal Title

      Plasma Fusion Res

      Volume: 17 Pages: 2406020-2406020

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Nonlinear propagation effect in x-ray parametric amplification during high harmonic generation2022

    • Author(s)
      Seres J.、Seres E.、Serrat C.、Dinh T. H.、Hasegawa N.、Ishino M.、Nishikino M.、Nakano K.、Namba S.
    • Journal Title

      Journal of the Optical Society of America B

      Volume: 39 Issue: 4 Pages: 1263-1263

    • DOI

      10.1364/josab.454902

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Numerical Study on Radiation Trapping of He I Resonance Lines in Arc Plasma Under High-Gas Pressures2021

    • Author(s)
      KAWAZOME Hayato、ISLAM Md Anwarul、NAMBA Shinichi
    • Journal Title

      Plasma and Fusion Research

      Volume: 16 Issue: 0 Pages: 2401012-2401012

    • DOI

      10.1585/pfr.16.2401012

    • NAID

      130007994294

    • ISSN
      1880-6821
    • Year and Date
      2021-02-10
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] VUV Emission Spectroscopy for Evaluation of Optical Thickness in He Cascade Arc Plasmas2021

    • Author(s)
      ISLAM Md. Anwarul、SHIGESADA Ryo、YAMAGUCHI Takumi、KAWAZOME Hayato、TAMURA Naoki、OKUNO Hiroki、NAMBA Shinichi
    • Journal Title

      Plasma and Fusion Research

      Volume: 16 Issue: 0 Pages: 2406011-2406011

    • DOI

      10.1585/pfr.16.2406011

    • NAID

      130008000731

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Development of High-Performance Cascade Arc Discharge Device for Applications to Plasma Window2021

    • Author(s)
      Islam Md. Anwarul、Yamaguchi Takumi、Fukuyama Kouhei、Kawazome Hayato、Tamura Naoki、Namba Shinichi
    • Journal Title

      IEEE Transactions on Plasma Science

      Volume: 49 Issue: 1 Pages: 21-25

    • DOI

      10.1109/tps.2020.3000729

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Charge-separated spectra of suprathermal highly charged bismuth ions in a dual laser-produced plasma soft x-ray source2020

    • Author(s)
      Kawasaki Hiromu、Tamura Toshiki、Sunahara Atsushi、Nishikino Masaharu、Namba Shinichi、O’Sullivan Gerry、Higashiguchi Takeshi
    • Journal Title

      Review of Scientific Instruments

      Volume: 91 Issue: 8 Pages: 086103-086103

    • DOI

      10.1063/5.0012225

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Parametric attosecond pulse amplification far from the ionization threshold from high order harmonic generation in He+2020

    • Author(s)
      Serrat C.、Seres J.、Seres E.、Dinh T. H.、Hasegawa N.、Nishikino M.、Namba S.
    • Journal Title

      Optics Express

      Volume: 28 Issue: 16 Pages: 24243-24243

    • DOI

      10.1364/oe.398595

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Deflagration-to-detonation transition in laser-ignited explosive gas contained in a smooth-wall tube2020

    • Author(s)
      Endo Takuma、Kuwajima Shimon、Kim Wookyung、Johzaki Tomoyuki、Shimokuri Daisuke、Miyoshi Akira、Namba Shin-ichi
    • Journal Title

      Combustion and Flame

      Volume: 219 Pages: 275-282

    • DOI

      10.1016/j.combustflame.2020.06.005

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Observation of water-window soft x-ray emission from laser-produced Au plasma under optically thin condition2020

    • Author(s)
      Christian John, Maki Kishimoto, Yasuhiro Matsumoto, Takehiro Morishita, Takeshi Higashiguchi, Takuma Endo, Atsushi Sunahara, Tomoyuki Johzaki, Shinichi Namba
    • Journal Title

      High Energy Density Physics

      Volume: 37 Pages: 100845-100845

    • DOI

      10.1016/j.hedp.2020.100845

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Electron temperature and soft x-ray intensity scaling in laser heavy element plasma interaction2020

    • Author(s)
      Kawasaki Hiromu、Sunahara Atsushi、Shimada Yuta、Ejima Takeo、Jiang Weihua、O’Sullivan Gerry、Nishikino Masaharu、Namba Shinichi、Higashiguchi Takeshi
    • Journal Title

      AIP Advances

      Volume: 10 Issue: 6 Pages: 065306-065306

    • DOI

      10.1063/5.0009946

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Characteristics of plasma window with various channel diameters for accelerator applications2020

    • Author(s)
      Ikoma N.、Miyake Y.、Takahashi M.、Okuno H.、Namba S.、Takahashi K.、Sasaki T.、Kikuchi T.
    • Journal Title

      Review of Scientific Instruments

      Volume: 91 Issue: 5 Pages: 053503-053503

    • DOI

      10.1063/1.5140709

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Observation of gain coefficients of 15.47nm Li-like Al soft x-ray laser in a recombining plasma pumped by a compact YAG laser2020

    • Author(s)
      Namba S.、John C.、Morishita T.、Kubo N.、Kishimoto M.、Hasegawa N.、Nishikino M.
    • Journal Title

      High Energy Density Physics

      Volume: 36 Pages: 100790-100790

    • DOI

      10.1016/j.hedp.2020.100790

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] Development of large channel diameter plasma window using indirectly heated hollow cathode2023

    • Author(s)
      K. Yamasaki, K. Okuda, J. Kono, A. Saito, D. Mori, Y Sunada, O. Yanagi,P. Yimin, K. Tomita, N. Tamura, H. Okuno, and S Namba
    • Organizer
      AAPPS-DPP2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Generation of high-order harmonics radiations around 13.5 nm by using a T-shaped He gas tube2023

    • Author(s)
      K. Mizushima, J. Seres, E. Seres. C. Serrat, T.-H. Dinh, N. Hasegawa, M. Ishino, T. Niinuma,M. Kume5 T. Higashiguchi, K. Yamasaki, and S. Namba
    • Organizer
      AAPPS-DPP2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Electron spectra in BISER harmonic radiation-Xe gas interaction2023

    • Author(s)
      S. Namba, H. Ohiro, A.S. Pirozhkov and M. Kando
    • Organizer
      OPIC ALPS
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Absorption length dependence of He I resonance line in He arcjet plasma2023

    • Author(s)
      K. Okuda, H. Kawazome, A. Saito, J. Kono, R. Hamada, Y. Kanbara, R. Suzuki N. Ohno,N. Tamura, Y. Hayashi, Y. Hamaji, S. Masuzaki, H. Okuno, K.Yamasaki and S. Namba
    • Organizer
      AAPPS-DPP2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] アルミニウムプラズマにおけるNe様イオン過渡励起法を用いた122 nmレーザー発振2023

    • Author(s)
      西井唯人,渡辺恵深,岸本 牧,城崎知至,王笳豪,山崎広太郎,難波愼一
    • Organizer
      プラズマ核融合学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] マルチパルスYAGレーザー照射による レーザー生成スズプラズマからのEUV発光の増大2023

    • Author(s)
      渡辺恵深,西井唯人,岸本 牧,城崎知至,東口武史,砂原淳,王笳豪, 山崎広太郎,難波愼一
    • Organizer
      プラズマ核融合学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Water window X-ray microscopy based on laser produced Au plasma2023

    • Author(s)
      J.H. Wang, M. Kishimoto, T. Johzaki, T. Higashiguchi, A. Sunahara, H. Ohiro, K. Yamasaki and S. Namba
    • Organizer
      AAPPS-DPP2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 磁気ボトル型電子分光器の開発と電子エネルギースペクトルの計測2023

    • Author(s)
      大廣 光,山﨑広太郎,難波愼一,ピロジコフ アレキサンダー,神門正城
    • Organizer
      レーザー学会学術講演会第43回年次大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 水の窓域X線源用レーザー生成プラズマにおける金多価イオンの生成2023

    • Author(s)
      王 笳豪,岸本牧,城崎 知至,東口 武史,砂原 淳,水嶋 海里,大廣 光,山崎 広太,難波 愼一
    • Organizer
      レーザー学会学術講演会第43回年次大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Development and optimization of cascaded arc plasma source in TPD-II2022

    • Author(s)
      Y. Hayashi, Y. Hamaji, S. Masuzaki, N. Ezumi, N. Ohno, S. Namba and M. Takagi
    • Organizer
      ISPlasma 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurements of electron temperature and density of a hollow cathode type cascade arc discharge by means of Thomson scattering2022

    • Author(s)
      K. Kurosaki, D. Norikoshi, K. Yamasaki, O. Yanagi, Y. Sunada, K. Hatta, R. Shigesada,M. Sumino, Md. Anwarul Islam, C. Suzuki H. Okuno and S. Namba
    • Organizer
      The 30th International Toki Conference on Plasma and Fusion Research
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurement of Auger electrons in BISER X-rays and Xe interaction by using a magnetic bottle electron spectrometer2022

    • Author(s)
      H. Ohiro, A.S. Pirozhkov, K. Ogura, A. Sagisaka, T.A. Pikuz, K. Huang, M. Kando, K. Yamasaki and S. Namba
    • Organizer
      The 11th Advanced Lasers and Photon Sources (ALPS2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Optimal target thickness and spot size for the water-window X-ray generation from the laser-produced Au plasma2022

    • Author(s)
      J.H. Wang, M. Kishimoto, T. Johzaki, K. Murakami, C. Kumeda, T. Higashiguchi, A. Sunahara, H. Ohiro, K. Yamasak and S. Namba
    • Organizer
      The 11th Advanced Lasers and Photon Sources (ALPS2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Generation of highly charged Au ion in laser-produced plasma for water window X-ray radiation sources2022

    • Author(s)
      J. Wang, M. Kishimoto, T. Jozaki, K. Murakami, C. Kumeda, T. Higashiguchi, A. Sunahara, H. Ohiro, K. Yamasakiand S. Namba
    • Organizer
      20th International Conference on the Physics of Highly Charged Ions
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Enhancement of gain coefficient of Li-like Al ion 3d-4f soft X-ray laser oscillation by a single resonator2022

    • Author(s)
      S. Namba, J.H. Wang, Z. Jiawei M. Kishimoto, K. Yamasaki, N. Hasegawa, T.H. Dinh, M. Ishino, T. Higashiguchi and M. Nishikino
    • Organizer
      20th International Conference on the Physics of Highly Charged Ions
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The effect of radiation trapping on the ambient gas pressure in a stationary high-density He arcjet plasma2022

    • Author(s)
      K. Okuda, O. Yanagi, Y. Sunada, J. Kono, D. Mori, A. Saito, M. Takagi, N. Ohno, N. Tamura, Y. Hayashi, Y. Hamaji, S. Masuzaki, H. Okuno, K.Yamasaki and S.Namba
    • Organizer
      Gaseous Electronics Conference 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of an alternative differential pumping system by virtual vacuum interface plasma window2022

    • Author(s)
      Y. Sunada, K. Okuda, O. Yanagi, K. Yamasaki, S. Namba
    • Organizer
      Gaseous Electronics Conference 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High-viscous Ar plasma generation for application to electron beam welding in atmosphere2022

    • Author(s)
      O. Yanagi, K. Okuda, Y. Sunada, J. Kono, D. Mori, A. Saitou, M. Takagi, N. Ohno, N. Tamura, Y. Hayashi, Y. Hamaji, S. Masuzaki, H. Okuno, K.Yamasaki, and S.Namba
    • Organizer
      Gaseous Electronics Conference 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Generation of stationary high-density cascade arc plasmas and its application to plasma windows2022

    • Author(s)
      S. Namba, K. Okuda, O. Yanagi, Y. Sunada, K. Yamasaki, N. Tamura, Y. Hayashi, Y. Hamaji, S. Masuzaki, M. Takagi, N. Ohno and H. Okuno
    • Organizer
      Gaseous Electronics Conference 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Enhancement of high-order harmonics radiations around 13.5 nm by a long-interaction gas tube and its application to photoresist materials2022

    • Author(s)
      S. Namba, J. Seres, E. Seres. C. Serrat, T.-H. Dinh, N. Hasegawa, H. Yamamoto, M. Ishino, M. Nishikino and T. Kawachi
    • Organizer
      6th Asia-Pacific Conference on Plasma Physics
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Development and optimization of cascaded arc plasma source in TPD-II2022

    • Author(s)
      Y. Hayashi, Y. Hamaji, S. Masuzaki, N. Ezumi, N. Ohno, S. Namba and M. Takagi
    • Organizer
      ISPlasma 2022 / IC-PlANTS 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of 122-nm VUV laser by means of a transient collisional excitation scheme2021

    • Author(s)
      S. Namba, J.H. Wang, K. Yamasaki, T. Johzaki, A. Sunahara, T. Kawamura, S. Mochizuki, T. Higashiguchi, T.-H, Dinh, N. Hasegawa, M. Nishikino, and T. Kawachi
    • Organizer
      5th Asia-Pacific Conference on Plasma Physics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Construction of a magnetic bottle electron spectrometer for electron energy measurement in BISER X-ray and Xe gas interaction2021

    • Author(s)
      H. Ohiro, A.S. Pirozhkov, T.A. Pikuz, K. Ogura, K. Huang, A. Sagisaka, M. Kando, S. Namba
    • Organizer
      5th Asia-Pacific Conference on Plasma Physics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High-Density Sheet Plasma for Versatile Applications of Plasma Window2021

    • Author(s)
      K. Hatta, O.Yanagi, R. Shigesada, M. Sumino, Y. Sunada, S. Namba, K.Yamasaki
    • Organizer
      5th Asia-Pacific Conference on Plasma Physics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurement of soft X-ray emission from laser-irradiated gold foils2021

    • Author(s)
      J.H. Wang, M. Kishimoto, T. Johzaki, T. Higashiguchi, A. Sunahara, D. T. Hung, N. Hasegawa, M. Nishikino, K. Yamasaki, S. Namba
    • Organizer
      5th Asia-Pacific Conference on Plasma Physics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Radiation Trapping of He Ⅰ Resonance Line in Helium Arc Jet Plasmas2021

    • Author(s)
      R. Shigesada, Y. Sunada, H. Kawazome, Md. Anwarul Islam, M. Sumino, K. Hatta, O. Yanagi, K. Kurosaki, N. Tamura, T. Okuno, K. Yamasaki, and S. Namba
    • Organizer
      5th Asia-Pacific Conference on Plasma Physics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Stationary hot dense He arc discharge apparatus using an indirectly heated LaB6 hollow cathode electron emitter2021

    • Author(s)
      M. Sumino, Y. Sunada, O. Yanagi, Md. Anwarul Islam, R. Shigesada, K. Hatta, K. Kurosaki, N. Tamura, H. Okuno, N. Ohno, M. Takagi, K. Yamasaki, S. Namba
    • Organizer
      5th Asia-Pacific Conference on Plasma Physics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of Optical Thickness in He Cascade Arc Plasmas Using VUV Emission Spectroscopy2021

    • Author(s)
      Md. Anwarul Islam, H. Kawazome, Y. Sunada, M. Sumino, R. Shigesada, K. Yamasaki, N. Tamura, H. Okuno, and S. Namba
    • Organizer
      5th Asia-Pacific Conference on Plasma Physics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Dependence of water window X-ray intensity on target thickness in laser produced Au plasmas2021

    • Author(s)
      K. Murakami, T. Jozaki, C. Kumada, A. Sunaharaa, T. Higashiguchi, K. Yamasaki and S. Namba
    • Organizer
      The 30th International Toki Conference on Plasma and Fusion Research
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Construction of a magnetic bottle electron spectrometer for electron energy measurement in BISER X-ray and Xe interaction2021

    • Author(s)
      H. Ohiro, A.S. Pirozhkov, K. Ogura, A. Sagisaka, T.A. Pikuz, K. Huang, M. Kando and S. Namba
    • Organizer
      The 30th International Toki Conference on Plasma and Fusion Research
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurements of electron temperature and density of a hollow cathode type cascade arc discharge by means of Thomson scattering2021

    • Author(s)
      K. Kurosaki, D. Norikoshi, K. Yamasaki, O. Yanagi, Y. Sunada, K. Hatta, R. Shigesada, M. Sumino, Md. Anwarul Islam, C. Suzuki H. Okuno and S. Namba
    • Organizer
      The 30th International Toki Conference on Plasma and Fusion Research
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] VUV Emission Spectroscopy for Evaluation of Optical Thickness in He Cascade Arc Plasmas2020

    • Author(s)
      Md. Anwarul ISLAM, Ryo SHIGESADA, Takumi YAMAGUCHI, Hayato KAWAZOME, Naoki TAMURA, Hiroki OKUNO and Shinichi NAMBA
    • Organizer
      29th International TOKI Conference
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical Study on Radiation Trapping of He I Resonance Lines in Arc Plasma Under High-Gas Pressures2020

    • Author(s)
      Hayato KAWAZOME, Md Anwarul ISLAM and Shinichi NAMB
    • Organizer
      29th International TOKI Conference
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Remarks]

    • URL

      https://www.plasmasciencelab.com/

    • Related Report
      2023 Annual Research Report
  • [Remarks] https://www.plasmasciencelab.com

    • Related Report
      2022 Annual Research Report
  • [Remarks]

    • URL

      https://www.plasmasciencelab.com/

    • Related Report
      2021 Annual Research Report
  • [Remarks] 広島大学大学院先進理工系科学研究科機械工学プログラムプラズマ基礎科学研究室

    • URL

      https://www.plasmasciencelab.com/

    • Related Report
      2020 Annual Research Report

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Published: 2020-04-28   Modified: 2024-12-25  

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