Effects of Collision Velocity and Mirror Ratio on Collision/Merging Processes of Field-Reversed Configurations*)

Daisuke Harashima, Tomohiko Asai, Daichi Kobayashi, Taichi Seki, Tatsuhiro Watanabe, Tsutomu Takahashi

Research output: Contribution to journalArticlepeer-review

Abstract

The effects of collision velocity and mirror ratio on the collision/merging processes of field-reversed configurations (FRCs) were experimentally evaluated. In the collisional merging experiment, the reversal field structure is reformed despite experiencing destructive perturbations resulting from collisions at supersonic/Alfvénic velocity. However, reformation of the reversal field structure was not observed under some experimental conditions, such as slow collision velocity or low mirror ratio. The radial profile of the reversal field structure and its time evolution were observed using an internal magnetic probe array. Collisional merging of FRCs was attempted by adjusting the external field profile. Experimental results suggest the dependence of the trapped poloidal flux of the formed FRC after merging on collision velocity and external magnetic boundary.

Original languageEnglish
Article number2402056
JournalPlasma and Fusion Research
Volume17
Issue numberSpecialIssue 1
DOIs
Publication statusPublished - 2022

Keywords

  • Collision velocity
  • Collisional merging
  • Field-reversed configuration
  • Mirror ratio

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