Rapid Communications

Full Text / References

Strong Reduction of Ion Flux to a Target Plate in a Magnetically Contracting Detached Plasma

Yuki HAYASHI, Hayato NISHIKATA, Noriyasu OHNO and Shin KAJITA¹⁾

Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan

1)Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8603, Japan

(Received 31 December 2015 / Accepted 14 January 2016 / Published 10 February 2016)

Abstract

Ion flux into a target plate in expanding and/or contracting magnetic field configuration has been measured under detached plasma condition in the linear plasma device NAGDIS-II. When the magnetic field was contracting towards the target plate, the strong reduction of the ion flux into the target was observed. This result indicates that the contraction in magnetic field should contribute to enhancing the degree of detachment. The magnetic-field-induced enhancement of electron density and the reduction of ion flow velocity due to the mirror effect in contracting magnetic field could lead to increasing volumetric recombination as well as the coupling between ions and electrons.

Copyright (c) 2016 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

NAGDIS-II, detached plasma, ion flux, magnetic field configuration

DOI: 10.1585/pfr.11.1202005

Full Text

PDF format (244Kbytes)

References

• [1] S.I. Krasheninnikov et al., J. Nucl. Mater. 266-269, 251 (1999).
• [2] N. Asakura et al., J. Nucl. Mater. 463, 1238 (2015).
• [3] V.A. Soukhanovskii et al., J. Nucl. Mater. 463, 1191 (2015).
• [4] N. Ohno et al., Nucl. Fusion 41, 1055 (2001).