物理学报2012，Vol.61Issue(20)：294-302,9.
HL-2A托卡马克上的边缘局域模特性初步研究
Preliminary behavior studies of edge localized modes on HL-2A
摘要
Abstract
The edge-localized modes (ELMs) are often excited in an H-mode plasma, and they are helpful for cleaning the H-mode plasma to sustain a steady state for a longer time by controlling plasma density and exhausting impurities, but energy and particles carded by ELM burst will badly damage the first-wall of fusion device, thus the characteristics of and the control and mitigation of ELM are studied necessarily prior to the basic operational regime operating on ITER. ELMs of different perturbation amplitudes are observed experimentally on HL-2A tokamak. The frequency of small perturbation amplitude ELM decreases with the increase of net heating power, and it is about 300--400 Hz, and energy loss induced by per ELM is usually less than 3% of the plasma energy. The small ELM is type III ELM. While for large (type-I) ELM, besides that the energy loss induced by an ELM is generally more than 10%, they also exert an obvious perturbation on other plasma parameters, such as plasma current and electron density, and the tELM may be longer than 30 ms. ELM precursors are poloidally asymmetric, which can be measured by Mirnov probes on the low field side, but not on the high field side; the frequency of ELM precursors is about 45 kHz, and the longest precursors last approximately 10 ms prior to the ELM bursts.关键词
HL-2A托卡马克/高约束模/边缘局域模/弹丸注入Key words
HL-2A tokamak/H-mode confinement/edge localized mode/pellet injection分类
数理科学引用本文复制引用
刘春华,聂林,黄渊,季小全,余德良,刘仪,冯震,姚可,崔正英,严龙文,丁玄同,董家齐,段旭如..HL-2A托卡马克上的边缘局域模特性初步研究[J].物理学报,2012,61(20):294-302,9.基金项目
国家自然科学基金,(批准号：10990213)资助的课题. （批准号：10990213）
