Direct Measurements of High Harmonic Fast Wave Profile in the UTST Spherical Tokamak Plasma

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概要

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• The spatial distribution of the radiofrequency (RF) magnetic field associated with a high harmonic fast wave (HHFW) was measured using an array of magnetic probes in the plasma inside the University of Tokyo Spherical Tokamak (UTST). Data obtained from 25 probes (19 locations for toroidal polarization and 6 locations for vertical polarization) distributed along the poloidal cross section were analyzed. The RF magnetic field is polarized in the toroidal direction, indicating that the HHFW is excited in the plasma. The RF field is weak on the inboard side. Analysis of the group delay suggests that the waves travel long distances in the plasma, probably because of poor absorption. No indication of parametric decay was observed up to 80 kW of injected RF power.

著者

• WAKATSUKI Takuma

  The University of Tokyo, Tokyo 113-0033, Japan

• NAGASHIMA Yoshihiko

  The University of Tokyo, Tokyo 113-0033, Japan

• OOSAKO Takuya

  The University of Tokyo, Tokyo 113-0033, Japan

• KOBAYASHI Hiroaki

  The University of Tokyo, Tokyo 113-0033, Japan

• AN Byung

  The University of Tokyo, Tokyo 113-0033, Japan

• KAKUDA Hidetoshi

  The University of Tokyo, Tokyo 113-0033, Japan

• YAMADA Takuma

  The University of Tokyo, Tokyo 113-0033, Japan

• IMAZAWA Ryota

  The University of Tokyo, Tokyo 113-0033, Japan

• WATANABE Osamu

  The University of Tokyo, Tokyo 113-0033, Japan

• YAMAGUCHI Takashi

  The University of Tokyo, Tokyo 113-0033, Japan

• KURASHINA Hiroki

  The University of Tokyo, Tokyo 113-0033, Japan

• HAYASHI Hiroyuki

  The University of Tokyo, Tokyo 113-0033, Japan

• YAMADA Kotaro

  The University of Tokyo, Tokyo 113-0033, Japan

• SAKAMOTO Takuya

  The University of Tokyo, Tokyo 113-0033, Japan

• HANASHIMA Kentaro

  The University of Tokyo, Tokyo 113-0033, Japan

• HIRATSUKA Junichi

  The University of Tokyo, Tokyo 113-0033, Japan

• KAMIO Shuji

  The University of Tokyo, Tokyo 113-0033, Japan

• HIHARA Ryuma

  The University of Tokyo, Tokyo 113-0033, Japan

• ABE Keita

  The University of Tokyo, Tokyo 113-0033, Japan

• SAKUMURA Morio

  The University of Tokyo, Tokyo 113-0033, Japan

• CAO Qinghong

  The University of Tokyo, Tokyo 113-0033, Japan

• INOMOTO Michiaki

  The University of Tokyo, Tokyo 113-0033, Japan

• ONO Yasushi

  The University of Tokyo, Tokyo 113-0033, Japan

• EJIRI Akira

  The University of Tokyo, Tokyo 113-0033, Japan

• TAKASE Yuichi

  The University of Tokyo, Tokyo 113-0033, Japan

• Inomoto Michiaki

  The University Of Tokyo

• Wakatsuki Takuma

  The University Of Tokyo

• Watanabe Osamu

  The University Of Tokyo

• Ejiri Akira

  The University Of Tokyo

• Kakuda Hidetoshi

  The University Of Tokyo

• Hiratsuka Junichi

  The University Of Tokyo

• Sakamoto Takuya

  The University Of Tokyo

• Ono Yasushi

  The University Of Tokyo

• Takase Yuichi

  The University of Tokyo

• KOBAYASHI Hiroaki

  The University of Tokyo, Chiba 277-8561, Japan

• KURASHINA Hiroki

  The University of Tokyo, Chiba 277-8561, Japan

• HANASHIMA Kentaro

  The University of Tokyo, Chiba 277-8561, Japan

• AN Byung

  The University of Tokyo, Chiba 277-8561, Japan

• NAGASHIMA Yoshihiko

  The University of Tokyo, Chiba 277-8561, Japan

• Yamada Takuma

  The University of Tokyo

• Cao Qinghong

  The University of Tokyo

• HAYASHI Hiroyuki

  The University of Tokyo, Chiba 277-8561, Japan

• OOSAKO Takuya

  The University of Tokyo

• Kamio Shuji

  The University of Tokyo

関連論文

• Direct Measurements of High Harmonic Fast Wave Profile in the UTST Spherical Tokamak Plasma
• Electron Density Measurements of Non-Inductive Start-Up Plasmas in the TST-2 Spherical Tokamak
• Fluctuation Measurement in the Edge Plasma on TST-2
• Comparison of Hydrogen and Deuterium Plasmas in ECH Start-Up Experiment in the TST-2 Spherical Tokamak
• Density Regimes of Low-Aspect-Ratio RFP Plasmas in RELAX
• Study of Particle Acceleration during Reconnection via TS-4 Particle Trajectory Simulations
• Study of Particle Acceleration during Reconnection via TS-4 Particle Trajectory Simulations
• Fluctuation Measurement Across the Broad Range of the Low-field Side Edge Plasmas in the TST-2 Spherical Tokamak
• X-ray Measurements during Plasma Current Start-up Experiments using the Lower Hybrid Wave on the TST-2 Spherical Tokamak
• Evaluation of Edge Electron Temperature Fluctuation by the Use of Fast Voltage Scanning Method on TST-2
• Electron Acceleration by Magnetic Reconnection During Spherical Tokamak Merging Experiment
• Off-Axis Temperature Anisotropy Measurement by Double-Pass Thomson Scattering Diagnostic System on TST-2
• Development of a Double-Pass Thomson Scattering System in the TST-2 Spherical Tokamak
• Feasibility of a Multi-Pass Thomson Scattering System with Confocal Spherical Mirrors
• Electron Acceleration by Magnetic Reconnection During Spherical Tokamak Merging Experiment
• Experimental Study of Two-Fluid Effect during Magnetic Reconnection in the UTST Merging Experiment
• Injection and Confinement of a Laser Pulse in an Optical Cavity for Multi-Pass Thomson Scattering Diagnostics in the TST-2 Spherical Tokamak Device

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