Dynamical movements of electron density profiles in spherical tokamak merging processes

• Hayashiya Hitoshi

  The University of Tokyo

• Katsurai Makoto

  The University of Tokyo

Bibliographic Information

Other Title

• 球状トカマク合体過程における電子密度分布の動的挙動
• キュウジョウ トカマク ガッタイ カテイ ニ オケル デンシ ミツド ブンプ ノ ドウテキ キョドウ

Abstract

The plasma merging is expected as one of innovative methods of initial heating for spherical tokamak (ST) plasmas. Detailed measurements of time evolution of electron density profiles during plasma merging processes in TS-3 device were performed using CO₂ laser interferometer with time and spatial resolution. The experimental observations show that the electrons are confined inside the magnetic separatrix firmly in the moving plasma during the merging process. It has been found that the plasma particles are not outpoured from confinement region throughout the magnetic reconnection event though the magnetic structure of plasma is changed drastically. Furthermore, it is shown that the electron density profile becomes hollow after the plasma merging. These results indicate that the plasma merging is effective not only as a method of initial heating of ST but also as a way for a particle supply to ST.

Journal

• IEEJ Transactions on Fundamentals and Materials

  IEEJ Transactions on Fundamentals and Materials 122 (6), 575-581, 2002

  The Institute of Electrical Engineers of Japan

Keywords

• plasma merging
• spherical tokamak(ST)
• Electron density profile
• TS-3
• Laser interferometer

Details

• CRID: 1390282679576723200
• NII Article ID: 130005404074
• NII Article ID: 10008510199
• NII Book ID: AN10136312
• DOI: 10.1541/ieejfms.122.575
• ISSN: 13475533
• ISSN: 03854205
• NDL BIB ID: 6174873
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6174873
• Web Site: https://www.jstage.jst.go.jp/article/ieejfms/122/6/122_6_575/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed