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Computation of Neutral Gas Flow Generation From a CT Neutralization Fuel-Injector

Takayuki WATANABE, Tetsuro OHSHIMA, Toshiki TAKAHASHI, Naoyuki FUKUMOTO¹⁾ and Masayoshi NAGATA¹⁾

Gunma University, Kiryu, Gunma 376-8515, Japan

1)

University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan

(Received 29 November 2011 / Accepted 14 March 2012 / Published 10 May 2012)

Abstract

The feasibility of compact torus (CT) neutralization fuel injection method is studied by a simulation model using particle and MHD hybrid techniques. The neutralization process is simulated by using rate-coefficients. The magnetic and electric fields are found to respond sluggishly to the neutralization process. Slow ions generated by charge-exchange have been added to the model, although the CT neutralization process was not significantly affected by this. Finally, the minimum length for the CT neutralizer is proposed as 2 m from the simulation run time 10 µs at a CT injection speed of 200 km/s.

Copyright (c) 2012 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

compact torus, charge-exchange, hybrid simulation, plasma fuel-injection, slow ion, neutralization

DOI: 10.1585/pfr.7.2405042

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References

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This paper may be cited as follows:

Takayuki WATANABE, Tetsuro OHSHIMA, Toshiki TAKAHASHI, Naoyuki FUKUMOTO and Masayoshi NAGATA, Plasma Fusion Res. 7, 2405042 (2012).