Observation of edge localized mode mitigation with plasma vertical jogs in HL-2A tokamak

doi:10.16568/j.0254-6086.201902001

NUCLEAR FUSION AND PLASMA PHYSICS ›› 2019, Vol. 39 ›› Issue (2): 97-103.DOI: 10.16568/j.0254-6086.201902001

• Plasma Physics • Next Articles

Observation of edge localized mode mitigation with plasma vertical jogs in HL-2A tokamak

WU Na1, 2, 3, CHEN Shao-yong1, 2, 3, TANG Chang-jian1, 2, SONG Xian-ming3, YANG Zeng-chen3, YU De-liang3, XU Jian-qiang3, HL-2A Team3

(1. College of Physical Science and Technology, Sichuan University, Chengdu 610064; 2. Key Laboratory of High Energy Density Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610064; 3. Southwestern Institute of Physics, Chengdu 610041)

Online:2019-06-15 Published:2019-06-13

HL-2A 等离子体垂直振荡缓解边缘局域模实验观测

吴娜1, 2, 3，陈少永*1, 2, 3，唐昌建1, 2，宋显明3，杨曾辰3，余德良3，许健强3，HL-2A 团队3

(1. 四川大学物理科学与技术学院，成都 610064； 2. 四川大学高能量密度物理及技术教育部重点实验室，成都 610064； 3. 核工业西南物理研究院，成都 610041)

作者简介:吴娜(1986-)，女，河南尉氏人，博士研究生，主要从事磁约束核聚变研究。
基金资助:
国家自然科学基金(11775154 ， 61471249)；国家磁约束核聚变能发展研究专项(2015GB104002B ， 2013GB107002)

Abstract

Abstract:

The plasma vertical jogging is performed by adding the square wave perturbation into horizontal field in HL-2A experiments. Edge localized mode (ELM) mitigation is observed when plasma moves upward vertically. The research finds that the plasma column expands due to formation of new edge closed flux surfaces during the upward moving, and then the pedestal widens. In addition, the recycling of working gas and impurity both increase during the ELM mitigation. The expansion of plasma column and the increasing of impurity and recycling of working gas may be the main physical factors of ELM mitigation. This work provides some reference for ELM control in future fusion devices.

Key words: Edge localized mode, Mitigation, Vertical jog, HL-2A tokamak

摘要：

在HL-2A 装置实验中，通过对水平场加入方波扰动，实现了等离子体垂直运动。当等离子体向上垂直运动时，观察到了边缘局域模(ELM)缓解现象。研究发现，等离子体向上运动过程中边缘不断形成新的闭合磁面，导致等离子体体积膨胀，进而使台基宽度增加。此外，ELM 缓解期间杂质和工作气体再循环有所增加。等离子体向上运动过程中体积膨胀、工作气体再循环及杂质增加可能是导致ELM 缓解的主要物理因素。该实验可为未来聚变实验装置ELM 的控制提供一些参考。

关键词: 边缘局域模, 缓解, 垂直振荡, HL-2A 装置

CLC Number:

O532+.11

WU Na, CHEN Shao-yong, TANG Chang-jian, SONG Xian-ming, YANG Ceng-chen, YU De-liang, XU Jian-qiang, HL-2A Team. Observation of edge localized mode mitigation with plasma vertical jogs in HL-2A tokamak[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2019, 39(2): 97-103.

吴娜1, 2, 3，陈少永*1, 2, 3，唐昌建1, 2，宋显明3，杨曾辰3，余德良3，许健强3，HL-2A 团队3. HL-2A 等离子体垂直振荡缓解边缘局域模实验观测[J]. 核聚变与等离子体物理, 2019, 39(2): 97-103.

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Observation of edge localized mode mitigation with plasma vertical jogs in HL-2A tokamak

HL-2A 等离子体垂直振荡缓解边缘局域模实验观测

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