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

• 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

Abstract

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 H_α 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 H_α 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 H_α 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

Keywords

• CCD camera
• tungsten
• H_α emission
• edge plasma
• neutral hydrogen

Details

• CRID: 1390282680230965248
• NII Article ID: 130000138105
• DOI: 10.1585/pfr.4.043
• ISSN: 18806821
• Web Site: http://www.jstage.jst.go.jp/article/pfr/4/0/4_0_043/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed