Development of a high-precision modulation-based plasma polarization spectroscopic system for the measurement of the electron velocity distribution

• Project/Area Number: 18K03576
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 14010:Fundamental plasma-related
• Research Institution: Kyoto University
• Principal Investigator: Shikama Taiichi 京都大学, 工学研究科, 准教授 (80456152)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: ECH / 電子速度分布 / プラズマ分光 / 偏光 / 衝突輻射モデル / 輻射輸送 / プラズマ計測 / ヘリウム原子 / 変調分光 / 光弾性変調器 / ストークスパラメータ

Outline of Final Research Achievements

A polarization spectroscopic method that can measure anisotropy in the electron velocity distribution (EVD) was developed. A modulation spectroscopic system was developed to measure small polarization degree in emission lines, and it was confirmed that the polarization degree of less than 1% is detectable. Using the developed system, we measured the EVD near the ECR surface in a helium ECR plasma and confirmed that the EVD has larger average energy in the direction perpendicular to the magnetic field. Moreover, the polarization of hydrogen Balmer-alpha emission line was measured to apply the method to a wide range of plasmas. The polarization degree of up to about 1.5% was observed.

Academic Significance and Societal Importance of the Research Achievements

等方なマクスウェル分布からずれた非等方な電子の速度分布が関連するプラズマ現象が，近年，宇宙プラズマから産業応用プラズマまで数多く報告されている．これらの報告は，3次元の電子速度分布を基礎パラメータとして把握することが，プラズマ科学を発展させる鍵となることを示している．
電子速度分布の従来の計測法では，速度分布の非等方性の情報まで得ることは容易ではなく，また，接触計測の必要性やプラズマへの擾乱，レーザーや波動の入射・出射ポートの確保，計測可能なプラズマパラメータの制限といった課題がある．本研究では，原子から放射される発光線の偏光を利用し，幅広いパラメータのプラズマに適用可能な手法を開発した．

Research Products

• [Int'l Joint Research] PIIM/Aix-Marseille University(フランス)
• [Journal Article] Toroidal flow measurements of impurity ions in QUEST ECH plasmas using multiple viewing chords emission spectroscopy (2021)
  • Author(s): Yoneda N.、Shikama T.、Hanada K.、Mori S.、Onchi T.、Kuroda K.、Hasuo M.、Ejiri A.、Matsuzaki K.、Osawa Y.、Peng Y.、Kawamata Y.、Sakamoto S.、Idei H.、Ido T.、Nakamura K.、Nagashima Y.、Ikezoe R.、Hasegawa M.、Higashijima A.、Nagata T.、Shimabukuro S.
  • Journal Title: Nuclear Materials and Energy Volume: 26 Pages: 100905-100905
  • DOI: 10.1016/j.nme.2021.100905
  • NAID: 130007648858
  • Peer Reviewed / Open Access
• [Journal Article] Investigation of radial distribution of atomic hydrogen flux to the plasma facing components in steady state discharges in QUEST tokamak (2021)
  • Author(s): Kuzmin A.、Kobayashi M.、Hanada K.、Idei H.、Onchi T.、Mori S.、Yoneda N.、Shikama T.、Hasuo M.、Ido T.、Nagashima Y.、Ikezoe R.、Hasegawa M.、Kuroda K.、Kono K.、Matsuo S.、Nagata T.、Shimabukuro S.、Higashijima A.、Niiya I.、Zushi H.
  • Journal Title: Nuclear Materials and Energy Volume: 26 Pages: 100872-100872
  • DOI: 10.1016/j.nme.2020.100872
  • Peer Reviewed / Open Access
• [Journal Article] Ro-vibrational population distribution in the ground state of hydrogen isotopologues in LHD peripheral plasmas deduced from emission spectroscopy (2021)
  • Author(s): Hiroki Ishihara , Arseniy Kuzmin, Masahiro Kobayashi, Taiichi Shikama, Keiji Sawada , Seiki Saito , Hiroaki Nakamura, Keisuke Fujii , Masahiro Hasuo, the LHD Experiment Group
  • Journal Title: Journal of Quantitative Spectroscopy & Radiative Transfer Volume: 267 Pages: 107592-107592
  • DOI: 10.1016/j.jqsrt.2021.107592
  • NAID: 120007184719
  • Peer Reviewed / Open Access
• [Journal Article] Spectroscopic Measurement of Hydrogen Atom Density in a Plasma Produced with 28 GHz ECH in QUEST (2020)
  • Author(s): Mori S.、Shikama T.、Hanada K.、Yoneda N.、Kuzmin A.、Hasuo M.、Idei H.、Onchi T.、Ejiri A.、Osawa Y.、Peng Y.、Matsuzaki K.、Kado S.、Sawada K.、Ido T.、Nakamura K.、Ikezoe R.、Nagashima Y.、Hasegawa M.、Kuroda K.、Higashijima A.、Nagata T.、Shimabukuro S.
  • Journal Title: Atoms Volume: 8 Issue: 3 Pages: 44-44
  • DOI: 10.3390/atoms8030044
  • Peer Reviewed / Open Access
• [Journal Article] A tesla-order magnetic field effect on all-optical thermometry using photoluminescence spectrum of diamond NV? center (2020)
  • Author(s): Shikama Taiichi、Watanabe Takato、Jouda Mazin、Hasuo Masahiro
  • Journal Title: Japanese Journal of Applied Physics Volume: 60 Issue: 1 Pages: 012001-012001
  • DOI: 10.35848/1347-4065/abcadb
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] On the Spatial Uniformity of the Degree of Ionization in a Helium ECR Plasma Produced under a Simple Cusp Field (2019)
  • Author(s): Ueda Akira、Shikama Taiichi、Iida Yohei、Hasuo Masahiro
  • Journal Title: Atoms Volume: 7 Issue: 2 Pages: 49-49
  • DOI: 10.3390/atoms7020049
  • Peer Reviewed / Open Access
• [Journal Article] Particle balance investigation with the combination of hydrogen barrier model and rate equations of hydrogen state in long duration discharges on all-metal plasma facing wall QUEST (2019)
  • Author(s): K.Hanada,N.Yoshida,M.Hasegawa,H.Idei,Y.Nagashima,K.Nakamura,T.Onchi,O.Watanabe,H.Watanabe,K.Tokunaga,A.Higashijima,S.Kawasaki,T.Nagata,S.Shimagukuro,A.Hatayama,K.Okamoto,I.Takagi,T.Hirata,T.Shikama,S.Murakami,H.Long,Z.X.Wang,Y.Oya,S.Kojima,K.Gaku,M.Oya,M.Miyamoto,Y.Oya,T.Takase,X.Gao,H.Liu,J.Qian,R.aman,M.Ono
  • Journal Title: Nuclear Fusion Volume: 投稿中 Issue: 7 Pages: 076007-076007
  • DOI: 10.1088/1741-4326/ab1858
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Estimation of fuel particle balance in steady state operation with hydrogen barrier model (2019)
  • Author(s): Hanada K.、Yoshida N.、Takagi I.、Hirata T.、Hatayama A.、Okamoto K.、Oya Y.、Shikama T.、et al.
  • Journal Title: Nuclear Materials and Energy Volume: 19 Pages: 544-549
  • DOI: 10.1016/j.nme.2019.03.015
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Spectroscopic Measurements of Impurity Ion Toroidal and Poloidal Flow Velocities and Their Dependence on Vertical Magnetic Field in QUEST Toroidal ECR Plasmas (2018)
  • Author(s): YONEDA Nao、SHIKAMA Taiichi、ZUSHI Hideki、HANADA Kazuaki、FUJIKAWA Akinobu、ONCHI Takumi、KURODA Kengoh、NII Kuniaki、HASUO Masahiro、HASEGAWA Makoto、IDEI Hiroshi、NAKAMURA Kazuo、NAGASHIMA Yoshihiko、HIGASHIJIMA Aki、NAGATA Takahiro
  • Journal Title: Plasma and Fusion Research Volume: 13 Issue: 0 Pages: 3402087-3402087
  • DOI: 10.1585/pfr.13.3402087
  • NAID: 130007472565
  • ISSN: 1880-6821
  • Year and Date: 2018-07-10
  • Peer Reviewed / Open Access
• [Journal Article] Spatially Resolved Measurements of Metastable Atom Density and Electric Field Strength in a Microhollow Cathode Helium Plasma by Laser Absorption Spectroscopy (2018)
  • Author(s): UENO Keisuke、KAMEBUCHI Kenta、KAKUTANI Jiro、MATSUOKA Leo、NAMBA Shinichi、FUJII Keisuke、SHIKAMA Taiichi、HASUO Masahiro
  • Journal Title: Plasma and Fusion Research Volume: 13 Issue: 0 Pages: 3406070-3406070
  • DOI: 10.1585/pfr.13.3406070
  • NAID: 130007437817
  • ISSN: 1880-6821
  • Year and Date: 2018-06-12
  • Peer Reviewed / Open Access
• [Journal Article] Measurements of the Impurity Flow Velocity and Temperature in Deuterium and Hydrogen Plasmas in the Divertor Legs of the Stochastic Layer in LHD (2018)
  • Author(s): KUZMIN Arseniy、KOBAYASHI Masahiro、NAKANO Tomohide、HASUO Masahiro、FUJII Keisuke、GOTO Motoshi、SHIKAMA Taiichi、MORISAKI Tomohiro、the LHD Experiment Group
  • Journal Title: Plasma and Fusion Research Volume: 13 Issue: 0 Pages: 3402058-3402058
  • DOI: 10.1585/pfr.13.3402058
  • NAID: 130007437736
  • ISSN: 1880-6821
  • Year and Date: 2018-06-12
  • Peer Reviewed / Open Access
• [Journal Article] Helium atom line-intensity ratios as an integrated diagnostic tool for low-pressure and low-density plasmas (2018)
  • Author(s): Ueda Akira、Shikama Taiichi、Teramoto Tatsuya、Higashi Takanori、Iida Yohei、Hasuo Masahiro
  • Journal Title: Physics of Plasmas Volume: 25 Issue: 5 Pages: 054508-054508
  • DOI: 10.1063/1.5027167
  • NAID: 120006652964
  • Peer Reviewed
• [Journal Article] Detection of anisotropy in the electron velocity distribution produced by electron cyclotron resonance heating using the polarization of helium atom emission lines (2018)
  • Author(s): Teramoto Tatsuya、Shikama Taiichi、Ueda Akira、Hasuo Masahiro
  • Journal Title: Applied Physics Letters Volume: 112 Issue: 21 Pages: 214101-214101
  • DOI: 10.1063/1.5031051
  • Peer Reviewed
• [Journal Article] Near-infrared Zeeman spectroscopy for the spatially resolved measurement of helium emission spectra in Heliotron J (2018)
  • Author(s): Shikama Taiichi、Kado Shinichiro、Okada Hiroyuki、Yamamoto Satoshi、Matsuoka Leo、Mizuuchi Toru、Minami Takashi、Kobayashi Shinji、Nagasaki Kazunobu、Oshima Shinsuke、Nakamura Yuji、Ishizawa Akihiro、Konoshima Shigeru、Hasuo Masahiro
  • Journal Title: Plasma Physics and Controlled Fusion Volume: 61 Issue: 2 Pages: 025001-025001
  • DOI: 10.1088/1361-6587/aaebdf
  • Peer Reviewed
• [Journal Article] Characteristics of an under-expanded supersonic flow in arcjet plasmas (2018)
  • Author(s): Namba Shinichi、Shikama Taiichi、Sasano Wataru、Tamura Naoki、Endo Takuma
  • Journal Title: Japanese Journal of Applied Physics Volume: 57 Issue: 6 Pages: 066101-066101
  • DOI: 10.7567/jjap.57.066101
  • NAID: 210000149129
  • Peer Reviewed
• [Presentation] ヘリオトロンJにおける近赤外原子輝線のゼーマン効果計測 (2021)
  • Author(s): 茶谷智樹、四竈泰一、上野陽平、門信一郎、川染勇人、南貴司、岡田浩之、松岡雷士、小林進二、大島慎介、石澤明宏、中村祐司、木島滋、水内亨、長崎百伸、蓮尾昌裕
  • Organizer: 日本物理学会 第76回年次大会
• [Presentation] QUESTにおける水素分子d3Π準位回転温度を利用したタングステン表面温度計測 (2021)
  • Author(s): 米田奈生、四竈泰一、F. Scotti、花田和明、井口拓己、出射浩、恩地拓己、江尻晶、井戸毅、河野香、彭翊、大澤佑規、弥富豪、木谷彰宏、工藤倫大、平賀涼輔、武田康佑、R. E. Bell、A. Maan、R. Majeski、小野雅之、蓮尾昌裕、中村一男、永島芳彦、池添竜也、長谷川真、黒田賢剛、東島亜紀、永田貴大、島袋瞬、新谷一朗、関谷泉
  • Organizer: 日本物理学会 第76回年次大会
• [Presentation] カスプ磁場中ECR放電を利用した強電離プラズマ源の開発 (2020)
  • Author(s): 四竈 泰一、蓮尾 昌裕
  • Organizer: 第37回 プラズマ・核融合学会年会
• [Presentation] LTX-βにおけるリチウム壁表面温度推定のための水素分子回転温度計測 (2020)
  • Author(s): 米田奈生、F. Scotti、R. E. Bell、四竈泰一、P. E. Hughes、A. Maan、V. A. Soukhanovskii、D. P. Boyle、R. P. Majeski、花田和明、小野雅之、蓮尾昌裕
  • Organizer: 2020年度 日本物理学会秋季大会
• [Presentation] 核融合プラズマ中原子輝線スペクトルのゼーマン効果高感度計測に向けた近赤外分光システム開発 (2020)
  • Author(s): 上野陽平、四竈泰一、茶谷智樹、門信一郎、川染勇人、岡田浩之、松岡雷士、南貴司、小林進二、大島慎介、石澤明宏、中村祐司、木島滋、水内亨、長崎百伸、蓮尾昌裕
  • Organizer: 第37回 プラズマ・核融合学会年会
• [Presentation] 核融合プラズマ中原子輝線スペクトルのゼーマン効果高感度計測に向けた近赤外分光システム開発 (2020)
  • Author(s): 上野陽平、四竈泰一、茶谷智樹、門信一郎、川染勇人、岡田浩之、松岡雷士、南貴司、小林進二、大島慎介、石澤明宏、中村祐司、木島滋、水内亨、長崎百伸、蓮尾昌裕
  • Organizer: 2020年度 日本分光学会年次講演会
• [Presentation] Toroidal Flow Measurements of Impurity Ions in QUEST ECH Plasmas using Multiple Viewing Chords Emission Spectroscopy (2020)
  • Author(s): Yoneda N., Shikama T., Hanada K., Mori S., Onchi T., Kuroda K., Hasuo M., Idei H., Nakamura K., Nagashima Y., Ikezoe R., Hasegawa M., Higashijima A., Nagata T., Shimabukuro S.
  • Organizer: 24th PSI
  • Int'l Joint Research
• [Presentation] Measurement of Hydrogen Molecular Rotational Temperatures in LTX-beta for the Thermometry of Plasma-Facing Lithium Surfaces (2020)
  • Author(s): Yoneda N., Scotti F., Bell R., Shikama T., Hughes P., Maan A., Soukhanovskii V., Boyle D., Majeski R., Hanada K., Ono M., Hasuo M.
  • Organizer: 62nd APS DPP
  • Int'l Joint Research
• [Presentation] Spatially resolved measurement of atomic emission line spectra using NIR Zeeman spectroscopy (2020)
  • Author(s): Shikama T., Ueno Y., Chatani T., Kado S., Kawazome H., Okada H., Matsuoka L., Minami T., Kobayashi S., Oshima S., Ishizawa A., Nakamura Y., Konoshima S., Mizuuchi T., Nagasaki K., Hasuo M.
  • Organizer: The 11th International Symposium to Advanced Energy Science
  • Int'l Joint Research
• [Presentation] 発光分光法を用いた核融合プラズマ中の電子ダイナミクス計測 (2020)
  • Author(s): 四竈 泰一
  • Organizer: 日本分光学会関西支部2019年度講演会
  • Invited
• [Presentation] QUEST 内側ポロイダルヌル配位における不純物イオン発光線サブピークの起源についての検討 (2020)
  • Author(s): 米田 奈生, 四竈 泰一, 花田 和明, 森 暁, 井口 拓巳, 恩地 拓巳, 蓮尾 昌裕, 出射 浩, 井戸 毅, et al.
  • Organizer: 日本物理学会 第75回年次大会
• [Presentation] Detection of anisotropy in the electron velocity distribution produced by electron cyclotron resonance heating using the polarization of helium atom emission lines (2019)
  • Author(s): Taiichi Shikama, Tatsuya Teramoto, Akira Ueda, Yohei Iida, and Masahiro Hasuo
  • Organizer: AAPPS-DPP2019
  • Int'l Joint Research / Invited
• [Presentation] Studies on plasma-lithium surface interactions in LTX-beta using optical emission spectroscopy of diatomic molecules (2019)
  • Author(s): Taiichi Shikama
  • Organizer: The 10th International Symposium to Advanced Energy Science
  • Int'l Joint Research
• [Presentation] Investigation of the spatial integration effect on the bremsstrahlung spectrum of an atmospheric pressure glow discharge in a pure helium gas (2019)
  • Author(s): Motonao Nagasaki, Taiichi Shikama, Yohei Ueno, and Masahiro Hasuo
  • Organizer: APSPT-11
  • Int'l Joint Research
• [Presentation] 純ヘリウム大気圧グロー放電の制動放射スペクトル空間分解計測 (2019)
  • Author(s): 長崎 意尚，四竈 泰一，上野 陽平，蓮尾 昌裕
  • Organizer: 第80回 応用物理学会秋季学術講演会
• [Presentation] 単一マルチモードファイバ内視鏡の変形に伴う空間分解能低下に対する影響の評価 (2019)
  • Author(s): 石川 理沙, 四竈 泰一, 蓮尾 昌裕
  • Organizer: 第80回 応用物理学会秋季学術講演会
• [Presentation] QUEST内側ポロイダルヌル配位のスクレイプオフ層における高速イオン流れの観測 (2019)
  • Author(s): 米田 奈生, 四竈 泰一, 花田 和明, 森 暁, 恩地 拓巳, 黒田 賢剛, 江尻 晶, 川又 裕也, 坂本 将, 松崎 亨平, 蓮尾 昌裕, 出射 浩, et al.
  • Organizer: 日本物理学会 2019年秋季大会
• [Presentation] QUEST 28 GHz ECHプラズマにおける水素原子密度の空間分布計測 (2019)
  • Author(s): 森 暁, 四竈 泰一, 花田 和明, 米田 奈生, 出射 浩, 恩地 拓巳, 村上 定義, 江尻 晶, 松崎 亨平, 彭 翊, 蓮尾 昌裕, et al.
  • Organizer: 日本物理学会 2019年秋季大会
• [Presentation] 近赤外ゼーマン分光法を用いたヘリオトロンJにおける原子発光ピーク位置計測 (2019)
  • Author(s): 四竈 泰一, 門 信一郎, 岡田 浩之, 山本 聡, 川染 勇人, 松岡 雷士, 南 貴司, 小林 進二, 大島 慎介, 中村 祐司, 石澤 明宏, 木島 滋, 水内 亨, 長崎 百伸, 蓮尾 昌裕
  • Organizer: 日本物理学会 2019年秋季大会
• [Presentation] ヘリウム原子発光線の偏光を利用したECRプラズマ中の電子速度分布異方性検出 (2018)
  • Author(s): 四竈 泰一，寺本 達哉，上田 明，長崎 意尚，蓮尾 昌裕
  • Organizer: 日本物理学会 2018秋季大会
• [Presentation] 発光線強度比法を用いたカスプ磁場配位ヘリウムECRプラズマの電離度空間分布計測 (2018)
  • Author(s): 上田 明，四竈 泰一，寺本 達哉，東 孝紀，飯田 洋平，蓮尾 昌裕
  • Organizer: 第79回 応用物理学会秋季学術講演会
• [Presentation] Detection of anisotropy in the electron velocity distribution produced by electron cyclotron resonance heating using the polarization of helium atom emission lines (2018)
  • Author(s): Taiichi Shikama, Tatsuya Teramoto, Akira Ueda, and Masahiro Hasuo
  • Organizer: 71st Annual Gaseous Electronics Conference
  • Int'l Joint Research
• [Presentation] Spectroscopic measurement of plasma parameters in a helium ECR discharge produced under a simple cusp field (2018)
  • Author(s): Akira Ueda, Taiichi Shikama, Tatsuya Teramoto, Takanori Higashi, Yohei Iida, and Masahiro Hasuo
  • Organizer: 71st Annual Gaseous Electronics Conference
  • Int'l Joint Research
• [Presentation] 近赤外原子発光線の高波長分解分光によるリサイクリング束局所計測 (2018)
  • Author(s): 四竈 泰一，門 信一郎，岡田 浩之，山本 聡，松岡 雷士，水内 亨，南 貴司，小林 進二，長崎 百伸，大島 慎介，中村 祐司，石澤 明宏，木島 滋，蓮尾 昌裕
  • Organizer: 第12回核融合エネルギー連合講演会
• [Presentation] 近赤外原子発光線のゼーマン効果を利用した 境界プラズマの原子放射率分布計測 (2018)
  • Author(s): 四竈 泰一
  • Organizer: 核融合科学研究所「原子分子過程研究と受動・能動分光計測の高度化のシナジー効果によるプラズマ科学の展開」，「原子分子データ応用フォーラムセミナー」合同研究会
• [Presentation] QUESTにおける不純物イオントロイダル回転の発光分光計測 (2018)
  • Author(s): 四竈 泰一
  • Organizer: RIAMフォーラム2018
  • Invited
• [Presentation] Measurement of the ion species dependence of the intrinsic edge rotation in spherical tokamak QUEST (2018)
  • Author(s): T. Shikama, K. Hanada, K. Nii, A. Fujikawa, H. Zushi, T. Onchi, M. Hasegawa, N. Yoneda, S. Mori, M. Hasuo, H. Idei, K. Nakamura, Y. Nagashima, K. Kuroda, A. Higashijima, and T. Nagata
  • Organizer: 23rd Plasma Surface Interaction in Conotrolled Fusion Devices
  • Int'l Joint Research
• [Presentation] Near-infrared Zeeman Spectroscopy for the Spatially Resolved Measurement of Helium Emission Spectra (2018)
  • Author(s): Taiichi Shikama
  • Organizer: 9th international symposium of advanced energy science, topical Seminar on Beam Emisson and Advanced Spectrometries for Fusion Plasmas
  • Int'l Joint Research / Invited
• [Presentation] Zeeman Spectroscopy for the Tomographic Measurement of Magnetically Confined Plasmas (2018)
  • Author(s): Taiichi Shikama
  • Organizer: 9th international symposium of advanced energy science
  • Int'l Joint Research / Invited
• [Presentation] QUEST ECHプラズマにおける不純物イオントロイダル流れの磁場配位依存性 (2018)
  • Author(s): 米田 奈生，四竈 泰一，花田 和明，藤川 祥亘，森 暁，出射 浩，恩地 拓巳，新居 邦亮，図子 秀樹，蓮尾 昌裕，中村 一男，永島 芳彦，池添 竜也，長谷川 真，黒田 賢剛，東島 亜紀，永田 貴大
  • Organizer: 第35回 プラズマ・核融合学会 年会
• [Remarks] 京都大学大学院工学研究科機械理工学専攻 光工学研究室
  • URL: http://oel.me.kyoto-u.ac.jp/
• [Remarks] 京都大学 光工学研究室 個人ページ
  • URL: http://oel.me.kyoto-u.ac.jp/shikama/index.html
• [Remarks] 京都大学 光工学研究室
  • URL: http://oel.me.kyoto-u.ac.jp/