Enhanced particle transport caused by resonant magnetic perturbations in the J-TEXT tokamak

Qiming Hu; Ge Zhuang; Q. Yu; Bo Rao; Li Gao; Nengchao Wang; Wei Jin; Bin Yi; Wubing Zeng; Wei Chen; Yonghua Ding; Zhipeng Chen; Xiwei Hu

doi:10.1088/0029-5515/54/6/064013

Enhanced particle transport caused by resonant magnetic perturbations in the J-TEXT tokamak

Qiming Hu, Ge Zhuang, Q. Yu, Bo Rao, Li Gao, Nengchao Wang, Wei Jin, Bin Yi, Wubing Zeng, Wei Chen, Yonghua Ding, Zhipeng Chen, Xiwei Hu

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

The effect of resonant magnetic perturbations (RMPs) on particle transport is studied in the J-TEXT tokamak. It is found that for the discharges with an existing saturated 2/1 resistive tearing mode (TM), applied RMPs of moderate amplitude lead to a decrease in electron density with a relative amplitude Δn̄_e/n̄_e0 ranging from -3% to -10% in the plasma core, and the mode stabilization and electron temperature increase are observed simultaneously in this case. Sufficiently large amplitude of RMPs, however, leads to locked modes and much larger decrease in the electron density as well as in the electron temperature, with Δn̄_e/ n̄_e0 ≈ -20%. For the discharges without 2/1 TMs, applied RMPs cause a relative density decrease Δn̄_e/n̄ _e0 ∼ 10% (-30%) before (after) field penetration. Using the two-fluid equations and experimental parameters as input, the nonlinear numerical results approximately agree with experimental observations.

Original language	English (US)
Article number	064013
Journal	Nuclear Fusion
Volume	54
Issue number	6
DOIs	https://doi.org/10.1088/0029-5515/54/6/064013
State	Published - Jun 2014
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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10.1088/0029-5515/54/6/064013

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@article{d705fb2e1eab40d9a9fd43aae30634b7,

title = "Enhanced particle transport caused by resonant magnetic perturbations in the J-TEXT tokamak",

abstract = "The effect of resonant magnetic perturbations (RMPs) on particle transport is studied in the J-TEXT tokamak. It is found that for the discharges with an existing saturated 2/1 resistive tearing mode (TM), applied RMPs of moderate amplitude lead to a decrease in electron density with a relative amplitude Δ{\=n}e/{\=n}e0 ranging from -3\% to -10\% in the plasma core, and the mode stabilization and electron temperature increase are observed simultaneously in this case. Sufficiently large amplitude of RMPs, however, leads to locked modes and much larger decrease in the electron density as well as in the electron temperature, with Δ{\=n}e/ {\=n}e0 ≈ -20\%. For the discharges without 2/1 TMs, applied RMPs cause a relative density decrease Δ{\=n}e/{\=n} e0 ∼ 10\% (-30\%) before (after) field penetration. Using the two-fluid equations and experimental parameters as input, the nonlinear numerical results approximately agree with experimental observations.",

author = "Qiming Hu and Ge Zhuang and Q. Yu and Bo Rao and Li Gao and Nengchao Wang and Wei Jin and Bin Yi and Wubing Zeng and Wei Chen and Yonghua Ding and Zhipeng Chen and Xiwei Hu",

year = "2014",

month = jun,

doi = "10.1088/0029-5515/54/6/064013",

language = "English (US)",

volume = "54",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing Ltd.",

number = "6",

}

TY - JOUR

T1 - Enhanced particle transport caused by resonant magnetic perturbations in the J-TEXT tokamak

AU - Hu, Qiming

AU - Zhuang, Ge

AU - Yu, Q.

AU - Rao, Bo

AU - Gao, Li

AU - Wang, Nengchao

AU - Jin, Wei

AU - Yi, Bin

AU - Zeng, Wubing

AU - Chen, Wei

AU - Ding, Yonghua

AU - Chen, Zhipeng

AU - Hu, Xiwei

PY - 2014/6

Y1 - 2014/6

N2 - The effect of resonant magnetic perturbations (RMPs) on particle transport is studied in the J-TEXT tokamak. It is found that for the discharges with an existing saturated 2/1 resistive tearing mode (TM), applied RMPs of moderate amplitude lead to a decrease in electron density with a relative amplitude Δn̄e/n̄e0 ranging from -3% to -10% in the plasma core, and the mode stabilization and electron temperature increase are observed simultaneously in this case. Sufficiently large amplitude of RMPs, however, leads to locked modes and much larger decrease in the electron density as well as in the electron temperature, with Δn̄e/ n̄e0 ≈ -20%. For the discharges without 2/1 TMs, applied RMPs cause a relative density decrease Δn̄e/n̄ e0 ∼ 10% (-30%) before (after) field penetration. Using the two-fluid equations and experimental parameters as input, the nonlinear numerical results approximately agree with experimental observations.

AB - The effect of resonant magnetic perturbations (RMPs) on particle transport is studied in the J-TEXT tokamak. It is found that for the discharges with an existing saturated 2/1 resistive tearing mode (TM), applied RMPs of moderate amplitude lead to a decrease in electron density with a relative amplitude Δn̄e/n̄e0 ranging from -3% to -10% in the plasma core, and the mode stabilization and electron temperature increase are observed simultaneously in this case. Sufficiently large amplitude of RMPs, however, leads to locked modes and much larger decrease in the electron density as well as in the electron temperature, with Δn̄e/ n̄e0 ≈ -20%. For the discharges without 2/1 TMs, applied RMPs cause a relative density decrease Δn̄e/n̄ e0 ∼ 10% (-30%) before (after) field penetration. Using the two-fluid equations and experimental parameters as input, the nonlinear numerical results approximately agree with experimental observations.

UR - https://www.scopus.com/pages/publications/84901429416

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U2 - 10.1088/0029-5515/54/6/064013

DO - 10.1088/0029-5515/54/6/064013

M3 - Article

AN - SCOPUS:84901429416

SN - 0029-5515

VL - 54

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 6

M1 - 064013

ER -

Enhanced particle transport caused by resonant magnetic perturbations in the J-TEXT tokamak

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