Effect of the Potential of Confined Plasma on End-Loss Ion in GAMMA 10/PDX

• JANG Seowon

  Plasma Research Center, University of Tsukuba, Tsukuba

• ICHIMURA Makoto

  Plasma Research Center, University of Tsukuba, Tsukuba

• HIRATA Mafumi

  Plasma Research Center, University of Tsukuba, Tsukuba

• IKEZOE Ryuya

  Research Institute for Applied Mechanics, Kyushu University

• SAKAMOTO Mizuki

  Plasma Research Center, University of Tsukuba, Tsukuba

• SUMIDA Shuhei

  Plasma Research Center, University of Tsukuba, Tsukuba

• IZUMI Koki

  Plasma Research Center, University of Tsukuba, Tsukuba

• TANAKA Atsuto

  Plasma Research Center, University of Tsukuba, Tsukuba

• KUBOTA Yushi

  Plasma Research Center, University of Tsukuba, Tsukuba

• SEKINE Ryo

  Plasma Research Center, University of Tsukuba, Tsukuba

• KAYANO Hiroki

  Plasma Research Center, University of Tsukuba, Tsukuba

• NAKASHIMA Yousuke

  Plasma Research Center, University of Tsukuba, Tsukuba

Abstract

In the GAMMA 10/PDX tandem mirror, studies on divertor physics have been performed in the west end region by utilizing end-loss plasmas flowing from the confinement region. Since the plasma density in the end region is quite low (∼10¹⁶ m⁻³), an increase of the end-loss ion flux is required. The increase of the end-loss ion flux has been obtained by increasing the density in the confinement region on previous experiments. When an additional ICRF heating using the antennas in the anchor cells has been performed, a significant increase of the ion flux has been observed with the increase of the potential in the central cell although the change of line densities in the confinement region is little. The effect of the potential on the ion flux has been examined on the GAMMA 10/PDX using about 10,000 discharges. The ion flux increases almost linearly with the potential and the density increase. By comparing with a simple calculation, the increase of the ion flux is explained by the expansion of loss cone boundary of ions and the decrease of the transport time of the end-loss ions from the confinement region to the end region.

Journal

• Plasma and Fusion Research

  Plasma and Fusion Research 14 (0), 2402032-2402032, 2019-02-12

  The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

• mirror confinement
• end-loss ion
• ion flux
• potential
• ICRF wave
• GAMMA 10/PDX

Details

• CRID: 1390282763106465408
• NII Article ID: 130007633128
• NII Book ID: AA12346675
• DOI: 10.1585/pfr.14.2402032
• ISSN: 18806821
• HANDLE: 2241/00157938
• Web Site: https://tsukuba.repo.nii.ac.jp/records/52519
• Web Site: https://www.jstage.jst.go.jp/article/pfr/14/0/14_2402032/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed