Plasma and Fusion Research

Volume 13, 1202108 (2018)

Rapid Communications

High-Resolution 2D Magnetic Field Measurement of Magnetic Reconnection Using Printed-Circuit Board Coils
Moe AKIMITSU, Yasushi ONO, Qinghong CAO and Hiroshi TANABE
Graduate School of Frontier Science, The University of Tokyo, Chiba 277-8561, Japan
(Received 26 April 2018 / Accepted 5 July 2018 / Published 25 September 2018)

Abstract

2D high-resolution magnetic probe arrays for local 2D magnetic field measurements of magnetic reconnection have been developed using advanced printed-circuit board (PCB) technology. Each of these arrays can be equipped with all three components of magnetic pickup coils (5 × 3 mm2). Each coil is composed of a two-sided coil circuit pattern with a line width of 0.05 mm. Based on this new probe technique, we conducted high-resolution and high-accuracy measurements of the current sheet to determine the formation and ejection of plasmoid in a current sheet of two merging tokamak plasmas for the first time.

Keywords

plasma diagnostics, magnetic probe, printed-circuit board, magnetic reconnection, plasmoid

DOI: 10.1585/pfr.13.1202108

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