Plasma and Fusion Research

Volume 7, 2401018 (2012)

Regular Articles

Steady-State Recombining Plasma in a Radio-Frequency Plasma Device for Divertor-Detachment Study
Atsushi OKAMOTO, Hiroyuki TAKAHASHI, Yusuke KAWAMURA, Akira DAIBO, Takahiro KUMAGAI, Sumio KITAJIMA and Mamiko SASAO
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
(Received 9 December 2011 / Accepted 12 February 2012 / Published 1 March 2012)

Abstract

Stable plasma production in a radio-frequency plasma source and steady-state high-neutral-pressure environment in a test region has been achieved simultaneously with backflow suppression components such as orifices and a differential pumping system. Neutral pressure in the test region is changed by two orders, resulting in changes in the electron temperature and density in the test region. Conversely, neutral pressure, electron temperature, and electron density near a plasma production region showed little change. The result indicates that the experimental device provides us independent control knobs of source plasma and neutral pressure in the test region.

Keywords

radio-frequency plasma production, divertor simulator, gas puffing, ion beam injection, backflow suppression

DOI: 10.1585/pfr.7.2401018

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This paper may be cited as follows:

Atsushi OKAMOTO, Hiroyuki TAKAHASHI, Yusuke KAWAMURA, Akira DAIBO, Takahiro KUMAGAI, Sumio KITAJIMA and Mamiko SASAO, Plasma Fusion Res. 7, 2401018 (2012).