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

Yong Liu, Yuejiang Shi, Tao Zhang, Chu Zhou*, Xiaolan Zou, Hailin Zhao, Ahdi Liu, Tianfu Zhou, Xiang Liu, Shoubiao Zhang, Bin Cao, Volker Naulin

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

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

Keywords

  • Non-local transport
  • Turbulence measurement
  • High spatial and temporal resolutions
  • Turbulence spreading

Cite this

Liu, Yong ; Shi, Yuejiang ; Zhang, Tao ; Zhou, Chu ; Zou, Xiaolan ; Zhao, Hailin ; Liu, Ahdi ; Zhou, Tianfu ; Liu, Xiang ; Zhang, Shoubiao ; Cao, Bin ; Naulin, Volker. / Dynamics of cold pulses induced by super-sonic molecular beam injection in the EAST tokamak. In: Nuclear Fusion. 2019 ; Vol. 59, No. 4.
@article{9eabee5f2c6c4e36898992a8f58ef0de,
title = "Dynamics of cold pulses induced by super-sonic molecular beam injection in the EAST tokamak",
abstract = "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.",
keywords = "Non-local transport, Turbulence measurement, High spatial and temporal resolutions, Turbulence spreading",
author = "Yong Liu and Yuejiang Shi and Tao Zhang and Chu Zhou and Xiaolan Zou and Hailin Zhao and Ahdi Liu and Tianfu Zhou and Xiang Liu and Shoubiao Zhang and Bin Cao and Volker Naulin",
year = "2019",
doi = "10.1088/1741-4326/ab0665",
language = "English",
volume = "59",
journal = "Nuclear Fusion",
issn = "0029-5515",
publisher = "IOP Publishing",
number = "4",

}

Liu, Y, Shi, Y, Zhang, T, Zhou, C, Zou, X, Zhao, H, Liu, A, Zhou, T, Liu, X, Zhang, S, Cao, B & Naulin, V 2019, 'Dynamics of cold pulses induced by super-sonic molecular beam injection in the EAST tokamak', Nuclear Fusion, vol. 59, no. 4, 044005. https://doi.org/10.1088/1741-4326/ab0665

Dynamics of cold pulses induced by super-sonic molecular beam injection in the EAST tokamak. / Liu, Yong; Shi, Yuejiang; Zhang, Tao; Zhou, Chu; Zou, Xiaolan; Zhao, Hailin; Liu, Ahdi; Zhou, Tianfu; Liu, Xiang; Zhang, Shoubiao; Cao, Bin; Naulin, Volker.

In: Nuclear Fusion, Vol. 59, No. 4, 044005, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Dynamics of cold pulses induced by super-sonic molecular beam injection in the EAST tokamak

AU - Liu, Yong

AU - Shi, Yuejiang

AU - Zhang, Tao

AU - Zhou, Chu

AU - Zou, Xiaolan

AU - Zhao, Hailin

AU - Liu, Ahdi

AU - Zhou, Tianfu

AU - Liu, Xiang

AU - Zhang, Shoubiao

AU - Cao, Bin

AU - Naulin, Volker

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

KW - Non-local transport

KW - Turbulence measurement

KW - High spatial and temporal resolutions

KW - Turbulence spreading

U2 - 10.1088/1741-4326/ab0665

DO - 10.1088/1741-4326/ab0665

M3 - Journal article

VL - 59

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 4

M1 - 044005

ER -