Observation of Blobs and Holes in the Boundary Plasma of EAST Tokamak  

作　　者：颜宁 徐国盛 张炜 常加峰 王亮 刘少承 刘鹏 汪惠乾 蒋敏 熊豪 丁斯晔 万宝年 高翔 V.NAULIN A.H.NIELSEN J.JuulRASMUSSEN 

机构地区：[1]Institute of Plasma Physics,Chinese Academy of Sciences [2]Association Euratom-Risφ DTU

出　　处：《Plasma Science and Technology》2011年第4期410-414,共5页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.11075181,10725523,10721505,10990212,10605028);the 973 Programme(No.2010GB104001)

摘　　要：Intermittent convective transport at the edge and in the scrape-off layer （SOL） of EAST was investigated by using fast reciprocating Langmuir probe. Holes, as part of plasma structures, were detected for the first time inside the shear layer. The amplitude probability distribution function of the turbulence is strongly skewed, with positive skewed events （＂blobs＂） prevailing in the SOL region and negative skewed events （＂holes＂） dominant inside the shear layer. The statistical properties coincide with previous observations from JET. The generation mechanism of blobs and holes is also discussed. In addition burst structure and dynamics character of them are also presented.Intermittent convective transport at the edge and in the scrape-off layer （SOL） of EAST was investigated by using fast reciprocating Langmuir probe. Holes, as part of plasma structures, were detected for the first time inside the shear layer. The amplitude probability distribution function of the turbulence is strongly skewed, with positive skewed events （＂blobs＂） prevailing in the SOL region and negative skewed events （＂holes＂） dominant inside the shear layer. The statistical properties coincide with previous observations from JET. The generation mechanism of blobs and holes is also discussed. In addition burst structure and dynamics character of them are also presented.

关 键 词：intermittent transport BLOBS HOLES generation mechanism dynamics character 

分 类 号：TL612[核科学技术—核技术及应用]