The behaviour of the argon transport with electron cyclotron resonance heating in J-TEXT

被引：0

作者：

Yan, Wei ^{[1
]}

Chen, Zhongyong ^{[1
]}

Zhang, Xiaolong ^{[2
]}

Xia, Donghui ^{[1
]}

Shi, Yuejiang ^{[3
]}

Jin, Wei ^{[4
]}

Li, Jianchao ^{[5
]}

Wang, Nengchao ^{[1
]}

Li, You ^{[1
]}

Fang, Jiangang ^{[1
]}

Yang, Zhoujun ^{[1
]}

Chen, Zhipeng ^{[1
]}

Ding, Yonghua ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, Int Joint Res Lab Magnet Confinement Fus & Plasma, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Peoples R China

[2] Southwestern Inst Phys, POB 432, Chengdu 610041, Sichuan, Peoples R China

[3] Enn Sci & Technol Dev Co Ltd, Langfang, Peoples R China

[4] China Acad Engn Phys, Ctr Interface Dynam Sustainabil, Chengdu 610200, Sichuan, Peoples R China

[5] Wuhan Inst Technol, Hubei Key Lab Opt Informat & Pattern Recognit, Wuhan 430205, Peoples R China

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2023年 / 65卷 / 05期

基金：

中国博士后科学基金; 中国国家自然科学基金; 国家重点研发计划;

关键词：

argon transport; precursor oscillations; ECRH; STRAHL; IMPURITY TRANSPORT; RADIATIVE MANTLE; Z DEPENDENCE; JET;

D O I：

10.1088/1361-6587/accaa1

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The transport of impurities is very important for burning plasma; in particular, the accumulation of highly charged impurities will lead to the deterioration of plasma performance and trigger disruption by radiation losses. In order to study impurity transport in Joint Texas EXperimental Tokamak electron cyclotron resonance heating (ECRH) plasmas, argon has been injected at the discharge flattop in an amount approximately 1% that of fuelling hydrogen gas to ensure no significant effect on the discharge. Experimental results show that precursor oscillations with a sawtooth appearance are beneficial for argon ion transport to the wall. The argon behaviour has been modulated by ECRH, with the power deposited inside/outside the sawtooth inverse radius. The ECRH power deposited outside the sawtooth inverse radius can induce larger precursor oscillations in the end of sawtooth and promote the argon transport. The ECRH power deposited inside the sawtooth inverse radius can induce oscillations in the mid-phase of the sawtooth and decrease the core toroidal rotation velocity, which can enhance argon transport. The results of the analysis that these oscillations can lead to an outward convection velocity, which means that the argon ions are transported to the wall. In addition, the oscillations in the mid-phase of the sawtooth can strongly enhance the argon transport.

引用

页数：8

共 41 条

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