Reconstructions of velocity distributions from fast-ion D-alpha (FIDA) measurements on EAST

Jianxun Su, Baonian Wan, Juan Huang*, Birgitte Madsen, Mirko Salewski, Yanxu Sun, Jinfang Wang, Jing Fu, Jiafeng Chang, Chengrui Wu, Lizhen Liang, Yingjie Chen, Guoqiang Zhong, Haiqing Liu, Qing Zang, Yingying Li, Bo Lyu, Jinping Qian, Xianzu Gong

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

2D fast-ion velocity-space distributions have been reconstructed from two-view fast-ion D-alpha (FIDA) measurements on experimental advanced superconducting tokamak (EAST). To make up for the sparse data and incomplete velocity-space coverage with the dual-view, we use non-negativity and null-measurements as prior information to reconstruct the velocity distribution in experiments with co- and counter-current neutral beam injection. An improved reconstructed fast-ion distribution is achieved by combining the existing O- and B-port FIDA measurements with the proposed A-port FIDA view. To further improve the reliability of FIDA-based reconstructions on EAST, based on real multi-view FIDA measurements on EAST in the near future, various bases will be studied further.

Original languageEnglish
Article number095103
JournalPlasma Science and Technology
Volume23
Issue number9
Number of pages11
ISSN1009-0630
DOIs
Publication statusPublished - 2021

Keywords

  • EAST tokamak
  • Fast ion
  • Fast-ion D-alpha (FIDA)
  • FIDASIM
  • Velocity-space tomography

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