Observation of Simple Helical Structure in Low Aspect Ratio RFP Using Fast Camera

Takumi ONCHI; Nobuhiro NISHINO; Ryuya IKEZOE; Akio SANPEI; Haruhiko HIMURA; Sadao MASAMUNE

doi:10.1585/pfr.3.005

Rapid Communications

Observation of Simple Helical Structure in Low Aspect Ratio RFP Using Fast Camera

Takumi ONCHI, Nobuhiro NISHINO, Ryuya IKEZOE, Akio SANPEI, Haruhiko HIMURA, Sadao MASAMUNE

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Keywords: reversed field pinch, low aspect ratio, fast camera, resistive MHD instabilities, helical structure

JOURNAL FREE ACCESS

2008 Volume 3 Pages 005

DOI https://doi.org/10.1585/pfr.3.005

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Abstract

A fast camera clearly detected a simple helical structure in the visible-light emission region in the reversed field pinch (RFP) configuration. The observed structure is consistent with magnetic field structures deduced from magnetic measurements with the help of equilibrium reconstruction. The observed simple structure is probably an indication of the internally resonant kink mode structure in a low aspect ratio RFP configuration.

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