Plasma and Fusion Research

Volume 15, 2402069 (2020)

Regular Articles


Behavior of a Tracer-Containing Compact Toroid in a Transverse Magnetic Field
Taichi SEKI, Daichi KOBAYASHI, Rika SASAKI, Asuna MINAMIGI, Tomohiko ASAI, Hiroshi GOTA1), Thomas ROCHE1), Tadafumi MATSUMOTO1,2), Toshiki TAKAHASHI3), Naoki TAMURA4) and Yoshiro NARUSHIMA4)
College of Science and Technology, Nihon University, Tokyo 101-8308, Japan
1)
TAE Technologies, Inc., Foothill Ranch, CA 92610, USA
2)
University of California at Irvine, Irvine, CA 92697, USA
3)
Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
4)
National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
(Received 29 November 2019 / Accepted 19 July 2020 / Published 1 September 2020)

Abstract

Studying impurity behavior in a magnetically confined plasma is essential for fusion reactor developments. A tracer-containing compact toroid (TCCT) injection have been developed as a new tracer injection technique for studying impurity accumulation and behavior in magnetically confined fusion plasmas. We generated and ejected the TCCT using a compact toroid (CT) injector that had successfully demonstrated CT injection fueling into a large field-reversed configuration (FRC). Tracer ions, e.g., tungsten, copper, and aluminum, are supplied by an independently controlled tracer source attached to the CT injector. The plasma containing tracer ions is accelerated and ejected by Lorentz self-force as the TCCT. To investigate whether tracer ions can be injected into the plasma without separation from the TCCT, we experiment by injecting the TCCT injection into a transverse magnetic field, emulating a confinement magnetic field of the FRC plasma.


Keywords

tracer-containing compact toroid, compact toroid injection, magnetized coaxial plasma gun, impurity transport, tracer, field-reversed configuration

DOI: 10.1585/pfr.15.2402069


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