Development of the Coaxial Multilaser System for Thomson Scattering Diagnostic

• Project/Area Number: 25289341
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: Yamada Ichihiro 核融合科学研究所, ヘリカル研究部, 准教授 (80222371)
• Co-Investigator(Kenkyū-buntansha): YASUHARA Ryo 核融合研, ヘリカル研究部, 助教 (30394290)
• Co-Investigator(Renkei-kenkyūsha): FUNABA Hisamichi 核融合研, ヘリカル研究部, 助教 (40300727) ; Minami Takashi 京都大学, エネルギー理工学研究所, 准教授 (40260046) ; YOSHIKAWA Masayuki 筑波大学, 大学院数理物質科学研究科, 准教授 (00272138) ; YOSHIDA Hidetsugu 大阪大学, レーザーエネルギー学研究センター, 技術専門職員 (30397781)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000); Fiscal Year 2015: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2014: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000); Fiscal Year 2013: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
• Keywords: プラズマ計測 / トムソン散乱計測 / マルチレーザーシステム

Outline of Final Research Achievements

In multilaser Thomson scattering systems, including the Large Helical Device (LHD) Thomson scattering system, flexible operations are possible. The beam packing method in which we have used previously, has some disadvantages because there are some differences among the laser beam paths. For example, unexpected experimental error is induced due to the beam path difference.
Therefore, we have developed a new coaxial beam merging system using a polarization control technique for the LHD Thomson scattering system, and successfully applied to our three laser system

Research Products

• [Int'l Joint Research] National Fusion Research Institute(韓国)
• [Journal Article] RECENT IMPROVEMENT OF THE LHD THOMSON SCATTERING SYSTEM (2015)
  • Author(s): I. Yamada , H. Funaba , R. Yasuhara and H. Hayashi
  • Journal Title: Proceedings of Science Volume: 1
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Electron temperature measurements using the LHD Thomson scattering system having four scattering configurations (2015)
  • Author(s): I. Yamada, R. Yasuhara, H. Funaba, K. Narihara, H. Hayashi, E. Yatsuka, T. Hatae, H. Tojo, M. Yoshikawa, and T. Minami
  • Journal Title: Europhys. Conf. abst. Volume: 38
  • Acknowledgement Compliant
• [Journal Article] Experimental possibility for the three electron temperature components on the LHD Thomson scattering system (2014)
  • Author(s): I. Yamada, R. Yasuhara, H. Funaba, K. Narihara, H. Hayashi, E. Yatsuka, T. Hatae, H. Tojo, M. Yoshikawa, and T. Minami
  • Journal Title: 40th EPS Conf. Proc. Volume: 1
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] First results of electron temperature measurements by the use of multi-pass Thomson scattering system in GAMMA 10 (2014)
  • Author(s): M. Yoshikawa, R. Yasuhara, K. Nagasu, Y. Shimamura, Y. Shima, J. Kohagura, M. Sakamoto, Y.Nakashima, T. Imai, M. Ichimura, I. Yamada, H. Funaba, K. Kawahata, and T. Minami
  • Journal Title: Rev. Sci. Instrum Volume: 85 Issue: 11
  • DOI: 10.1063/1.4885542
  • Peer Reviewed / Open Access
• [Journal Article] First Results of Electron Temperature Measurements with a Multi-Pass Thomson Scattering System in the Tandem Mirror GAMMA 10 (2014)
  • Author(s): Masayuki YOSHIKAWA, Ryo YASUHARA, Kazuhide NAGASU, Yuuki SHIMAMURA, Yoriko SHIMA, Junko KOHAGURA, Mizuki SAKAMOTO, Yousuke NAKASHIMA, Tsuyoshi IMAI, Makoto ICHIMURA, Ichihiro YAMADA, Hisamichi FUNABA, Kazuo KAWAHATA and Takashi MINAMI
  • Journal Title: Plasma and Fusion Research Volume: 9 Issue: 0 Pages: 1202126-1202126
  • DOI: 10.1585/pfr.9.1202126
  • NAID: 130005093279
  • ISSN: 1880-6821
  • Peer Reviewed / Open Access
• [Journal Article] Terbium gallium garnet ceramic Faraday rotator for high-power laser application (2014)
  • Author(s): Ryo Yasuhara, Ilya Snetkov, Alexey Starobor, Dmitry Zheleznov, Oleg Palashov, Efim Khazanov, Hoshiteru Nozawa, and Takagimi Yanagitani
  • Journal Title: Optics Letters Volume: 39 Pages: 1145-1148
  • Peer Reviewed
• [Journal Article] Backward and forward scattering configurations in LHD Thomson scattering system (2013)
  • Author(s): I. Yamada, R. Yasuhara, H. Funaba, K. Narihara, H. Hayashi, E. Yatsuka, T. Hatae, H. Tojo, M. Yoshikawa, and T. Minami
  • Journal Title: 40th EPS Proceedings Volume: 37D
• [Journal Article] Polarization-Controlled Multi-Pass Thomson Scattering System in the Tandem Mirror GAMMA 10 (2013)
  • Author(s): M. Yoshikawa, R. Yasuhara, S. Sakamoto, R. Sekiguchi, Y. Shima, J. Kohagura, M. Sakamoto, Y. Nakashima, T. Imai, M. Ichimura, I. Yamada, H. Funaba, K. Kawahata and T. Minami
  • Journal Title: Plasma and Fusion Research Volume: 8
  • NAID: 130003392938
  • Peer Reviewed
• [Presentation] I. Yamada, H. Funaba, R. Yasuhara, H. Hayashi, M. Yoshikawa, K. Ohta, J. H. Lee, and S. H. Lee (2016)
  • Author(s): Calibrations of the LHD Thomson scattering system
  • Organizer: 21st Topical Conference on High-Temperature Plasma Diagnostics
  • Place of Presentation: Madison, USA
  • Year and Date: 2016-06-05
  • Int'l Joint Research
• [Presentation] Progress of the multi-pass Thomson scattering system in LHD (2015)
  • Author(s): R. Yasuhara, I. Yamada, E. Yatsuka, M. Yoshikawa, H. Funaba, H. Tojo, H. Hayashi, and T. Hatae
  • Organizer: 17th International Symposium on Laser-Aided Plasma Daignostics
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 2015-09-27
  • Int'l Joint Research / Invited
• [Presentation] Coaxial Laser Beam Merging System for the LHD Thomson Scattering System (2015)
  • Author(s): I. Yamada, R. Yasuhara, H. Funaba, H. Hayashi, M. Yoshikawa, and J. H. Lee
  • Organizer: 17th International Symposium on Laser-Aided Plasma Daignostics
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 2015-09-27
  • Int'l Joint Research
• [Presentation] Data processing for real-time measurement of electron temperature and density by Thomson scattering in the long pulse plasmas on LHD (2015)
  • Author(s): H. Funaba, I. Yamada, R. Yasuhara, H. Hayashi, M. Yoshikawa, T. Minami and LHD Experiment Group
  • Organizer: 17th International Symposium on Laser-Aided Plasma Daignostics
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 2015-09-27
  • Int'l Joint Research
• [Presentation] Development of proto-type polychromator system for KSTAR Thomson scattering diagnostic (2015)
  • Author(s): J. H. Lee, S. H. Lee, S. H. Son, W. H. Ko, D. C. Seo, I. Yamada, K. H. Heo, J. S. Jeon, and M. G. Bog
  • Organizer: 17th International Symposium on Laser-Aided Plasma Daignostics
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 2015-09-27
  • Int'l Joint Research
• [Presentation] Electron temperature measurements using the LHD Thomson scattering system having four scattering configurations (2015)
  • Author(s): I. Yamada, R. Yasuhara, H. Funaba, K. Narihara, H. Hayashi, E. Yatsuka, T. Hatae, H. Tojo, M. Yoshikawa, and T. Minami
  • Organizer: 42nd European Physical Society Conference on Plasma Physics
  • Place of Presentation: Lisbon, Portugal
  • Year and Date: 2015-06-22
  • Int'l Joint Research
• [Presentation] RECENT IMPROVEMENT OF THE LHD THOMSON SCATTERING SYSTEM (2015)
  • Author(s): I. Yamada , H. Funaba , R. Yasuhara and H. Hayashi
  • Organizer: 1st EPS conference on Plasma Diagnostic
  • Place of Presentation: Frascati, Italy
  • Year and Date: 2015-04-14
  • Int'l Joint Research
• [Presentation] Electron temperature measurement using backward and forward Thomson scatterings in the LHD Thomson scattering system (2015)
  • Author(s): I. Yamada
  • Organizer: A3 Foresight Program Workshop
  • Place of Presentation: Nanning, China
  • Year and Date: 2015-01-06 – 2015-01-09
• [Presentation] Electron density profile measurement using the LHD Thomson scattering system (2014)
  • Author(s): I. Yamada, H. Funaba, R. Yasuhara, and H. Hayashi
  • Organizer: Plasma Conference 2014
  • Place of Presentation: Niigata, Japan
  • Year and Date: 2014-11-18 – 2014-11-21
• [Presentation] Development of Thomson scattering system in the tandem mirror GAMMA 10 (2014)
  • Author(s): M. Yoshikawa, X. Wang, M. Morishita, Y. Shima, M. Chikatsu, J. Kohagura, R. Minami, M. Sakamoto, Y. Nakashima, T. Imai, M. Ichimura, R. Yasuhara, I. Yamada, H. Funaba, and T.Minami
  • Organizer: Plasma Conference 2014
  • Place of Presentation: Niigata, Japan
  • Year and Date: 2014-11-18 – 2014-11-21
• [Presentation] Density Correction Method Using a Beam Image Position Monitor in the LHD Thomson scattering System (2014)
  • Author(s): I. Yamada, R. Yashuhara, H. Funaba, and H. Hayashi
  • Organizer: 17th International Congress on Plasma Physics
  • Place of Presentation: Lisbon, Portugal
  • Year and Date: 2014-09-15 – 2014-09-19
• [Presentation] DEVELOPMENT OF THOMSON SCATTERING SYSTEM IN GAMMA 10 (2014)
  • Author(s): M. Yoshikawa, X. Wang, M. Morishita, Y. Shima, M. Chikatsu, J. Kohagura, M. Sakamoto, R. Minami, M. Iso, Y. Nakashima, T. Imai, M. Ichimura, R. Yasuhara, I. Yamada, H. Funaba, and T. Minami
  • Organizer: The 10th International Conference on Open Magnetic System for Plasma Confinement
  • Place of Presentation: Daejeon, Korea
  • Year and Date: 2014-08-26 – 2014-08-29
• [Presentation] Experimental possibility for the three electron temperature components on the LHD Thomson scattering system (2014)
  • Author(s): I. Yamada, R. Yasuhara, H. Funaba, K. Narihara, H. Hayashi, E. Yatsuka, T. Hatae, H. Tojo, M. Yoshikawa, and T. Minami
  • Organizer: 40th European Physical Society Conference on Plasma Physics
  • Place of Presentation: Berlin, Germany
  • Year and Date: 2014-06-23 – 2014-06-27
• [Presentation] Short interval multi-laser Thomson scattering measurement for the hydrogen pellet ablation in LHD (2014)
  • Author(s): R. Yasuhara, R. Sakamoto, I. Yamada, G. Motojima, and H. Hayashi
  • Organizer: 20th Topical Conference on High-Temperature Plasma Diagnostic
  • Place of Presentation: Atlanta, USA
  • Year and Date: 2014-06-01 – 2014-06-05
• [Presentation] First results of electron temperature measurements by using the multi-pass Thomson scattering system in GAMMA 10 (2014)
  • Author(s): M. Yoshikawa, R. Yasuhara, K. Nagasu, Y. Shimamura, Y. Shima, J. Kohaguro, M. Sakamoto, Y. Nakashima, T. Imai, M. Ichimura, I. Yamada, H. Funaba, K. Kawahata, and T. Minami
  • Organizer: 20th Topical Conference on High-Temperature Plasma Diagnostic
  • Place of Presentation: Atlanta, USA
  • Year and Date: 2014-06-01 – 2014-06-05
• [Presentation] Backward and forward scattering configurations in LHD Thomson scattering system (2013)
  • Author(s): I. Yamada, R. Yasuhara, H. Funaba, K. Narihara, H. Hayashi, E. Yatsuka, T. Hatae, H. Tojo, M. Yoshikawa, and T. Minami
  • Organizer: 40th European Physical Society Conference on Plasma Physics
  • Place of Presentation: Espoo, Finland
• [Presentation] Optimization of polychromators of the LHD Thomson scattering system for backward and forward scattering measurements (2013)
  • Author(s): I. Yamada, R. Yasuhara, H. Funaba, K. Narihara, H. Hayashi, E. Yatsuka, T. Hatae, H. Tojo, M. Yoshikawa, and T. Minami
  • Organizer: 16th International Symposium on Laser Aided Plasma Diagnostics
  • Place of Presentation: Wisconsin, USA
• [Presentation] Design and demonstration of the double pass Thomson scattering measurement in LHD (2013)
  • Author(s): R. Yasuhara, I. Yamada, E. Yatsuka, M. Yoshikawa, H. Funaba, H. Hayashi, H. Tojo, and T. Hatae
  • Organizer: 16th International Symposium on Laser Aided Plasma Diagnostics
  • Place of Presentation: Wisconsin, USA
• [Presentation] Electron temperature and density measurements by using the Thomson scattering system in the tandem mirror GAMMA 10 (2013)
  • Author(s): M. Yoshikawa, K. Nagasu, Y. Shimamura, Y. Shima, J. Kohagura, K. Kitagawa, M. Morishita, M.Sakamoto, Y. Nakashima, T. Imai, M. Ichimura, R. Kawarazaki, I. Yamada, R. Yasuhara, H. Funaba, and T. Minami
  • Organizer: 16th International Symposium on Laser Aided Plasma Diagnostics
  • Place of Presentation: Wisconsin, USA