Dynamics of cold pulses induced by super-sonic molecular beam injection in the EAST tokamak

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

DOI

  • Author: Liu, Yong

    Chinese Academy of Sciences, China

  • Author: Shi, Yuejiang

    Seoul National University, Korea, Democratic People's Republic of

  • Author: Zhang, Tao

    Chinese Academy of Sciences, China

  • Author: Zhou, Chu

    University of Science and Technology of China, China

  • Author: Zou, Xiaolan

    CEA, France

  • Author: Zhao, Hailin

    Chinese Academy of Sciences, China

  • Author: Liu, Ahdi

  • Author: Zhou, Tianfu

    Chinese Academy of Sciences, China

  • Author: Liu, Xiang

    Chinese Academy of Sciences, China

  • Author: Zhang, Shoubiao

    Chinese Academy of Sciences, China

  • Author: Cao, Bin

    Chinese Academy of Sciences, China

  • Author: Naulin, Volker

    Plasma Physics and Fusion Energy, Department of Physics, Technical University of Denmark, Fysikvej, 2800, Kgs. Lyngby, Denmark

View graph of relations

Evolution of electron temperature, electron density and its fluctuation with high spatial and temporal resolutions are presented for the cold pulse propagation induced by super-sonic molecular beam injection (SMBI) in ohmic plasmas in the EAST tokamak. The non-local heat transport occurs for discharges with plasma current Ip = 450 kA (q95 ∼ 5.55), and electron density ne0 below a critical value of (1.35 ± 0.25) x 1019 m-3. In contrary to the response of core electron temperature and electron density (roughly 10ms after SMBI), the electron density fluctuation in the plasma core increases promptly after SMBI and reaches its maximum around 15 ms after SMBI. The electron density fluctuation in the plasma core begins to decrease before the core electron temperature reaches its maximum (roughly 30ms). It was also observed that the turbulence perpendicular velocity close to the inversion point of the temperature perturbation changes sign after SMBI.

Original languageEnglish
Article number044005
JournalNuclear Fusion
Volume59
Issue number4
Number of pages6
ISSN0029-5515
DOIs
Publication statusPublished - 2019
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Non-local transport, Turbulence measurement, High spatial and temporal resolutions, Turbulence spreading
Download as:
Download as PDF
Select render style:
APAAuthorCBE/CSEHarvardMLAStandardVancouverShortLong
PDF
Download as HTML
Select render style:
APAAuthorCBE/CSEHarvardMLAStandardVancouverShortLong
HTML
Download as Word
Select render style:
APAAuthorCBE/CSEHarvardMLAStandardVancouverShortLong
Word

ID: 170786424