Axial Profile of Balmer-Alpha Emission near a Tungsten Target in the Compact PWI Simulator APSEDAS

DOI Web Site 4 References Open Access
  • HIGASHIZONO Yuta
    Advanced Fusion Research Center, Research Institute for Applied Mechanics, Kyushu University,Kasuga, Fukuoka 816-8580, Japan
  • SAKAMOTO Mizuki
    Advanced Fusion Research Center, Research Institute for Applied Mechanics, Kyushu University,Kasuga, Fukuoka 816-8580, Japan
  • MIYAZAKI Toshimasa
    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
  • OGAWA Kazuma
    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
  • OZAKI Kazuki
    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
  • NAKASHIMA Yousuke
    Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
  • SHOJI Tatsuo
    Department of Engineering, Nagoya University, Nagoya 464-8603, Japan
  • ASHIKAWA Naoko
    National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
  • TOKITANI Masayuki
    National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
  • TOKUNAGA Kazutoshi
    Advanced Fusion Research Center, Research Institute for Applied Mechanics, Kyushu University,Kasuga, Fukuoka 816-8580, Japan
  • MASUZAKI Suguru
    National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
  • OHYA Kaoru
    Department of Electrical and Electronic Engineering, University of Tokushima, Tokushima 770-8506, Japan
  • SAGARA Akio
    National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
  • SATO Kohnosuke
    Advanced Fusion Research Center, Research Institute for Applied Mechanics, Kyushu University,Kasuga, Fukuoka 816-8580, Japan

Description

The axial profile of Balmer-alpha emission near a tungsten target has been measured in the compact plasma wall interaction (PWI) simulator Advanced PWI Simulation Experimental Device and Analysis System (APSEDAS). Axial Hα emission decreases toward the target at two levels, a steep gradient within 10 mm of the target and a shallow gradient more than 10 mm away. The structure of the Hα profile within 40 mm of the target is the same even though the electron density changes by one order of magnitude and the neutral pressure changes by a factor of three. On the other hand, the Hα profile more than 40 mm from the target gradually increases with increasing hydrogen filling pressure, although it does not change with the density in the case of constant filling pressure.

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research 4 043-043, 2009

    The Japan Society of Plasma Science and Nuclear Fusion Research

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