Development of the Coaxial Multilaser System for Thomson Scattering Diagnostic

2015 Fiscal Year Final Research Report

• 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
• 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

Free Research Field

核融合科学・プラズマ計測学