Blob properties in I-mode and ELM-free H-mode compared to L-mode on EAST  

作　　者：汪平 胡广海 王亮 颜宁 仲小明 徐国盛 冯喜 叶扬 丁根凡 余林 刘阿娣 段艳敏 李二众 徐立清 刘海庆 丁锐 张斌 李妙辉 丁伯江 秦成明 张新军 王晓洁 吕波 张凌 吴茗甫 臧庆 林新 邹晓岚 宋云涛 Ping WANG;Guanghai HU;Liang WANG;Ning YAN;Xiaoming ZHONG;Guosheng XU;Xi FENG;Yang YE;Genfan DING;Lin YU;Adi LIU;Yanmin DUAN;Erzhong LI;Liqing XU;Haiqing LIU;Rui DING;Bin ZHANG;Miaohui LI;Bojiang DING;Chengming QIN;Xinjun ZHANG;Xiaojie WANG;Bo LYU;Ling ZHANG;Mingfu WU;Qing ZANG;Xin LIN;Xiaolan ZOU;Yuntao SONG(Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,People’s Republic of China;University of Science and Technology of China,Hefei 230026,People’s Republic of China;Institute of Energy,Hefei Comprehensive National Science Centre,Hefei 230031,People’s Republic of China;Shenzhen University,Shenzhen 518061,People’s Republic of China;CEA,IRFM,F-13108 St Paul Les Durance,France)

机构地区：[1]Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,People’s Republic of China [2]University of Science and Technology of China,Hefei 230026,People’s Republic of China [3]Institute of Energy,Hefei Comprehensive National Science Centre,Hefei 230031,People’s Republic of China [4]Shenzhen University,Shenzhen 518061,People’s Republic of China [5]CEA,IRFM,F-13108 St Paul Les Durance,France

出　　处：《Plasma Science and Technology》2023年第4期51-60,共10页等离子体科学和技术（英文版）

基　　金：supported by the National Key R&D Program of China(Nos.2022YFE03020004,2017YFE0301300,2018YFE0303104 and 2019YFE03030000);the Major Science and Technology Infrastructure Maintenance and Reconstruction Projects of the Chinese Academy of Sciences;National Natural Science Foundation of China(Nos.12275313,11922513,12005004 and U19A20113);the Institute of Energy,Hefei Comprehensive National Science Center(No.GXXT-2020-004);the Anhui Provincial Natural Science Foundation(No.2008085QA38);the Users with Excellence Program of Hefei Science Center,Chinese Academy of Sciences(No.2020HSC-UE009)。

摘　　要：The blob properties in I-mode and ELM-free H-mode plasmas compared to L-mode have been investigated on the EAST tokamak,including the blob detection rate Nb,sizeδb,lifetimeτb and radial velocity vr,b.The blob properties in L-mode and I-mode are similar,and those in ELM-free H-mode are different to them.The blob Nbis smaller whileτbis larger in H-mode.The experimental blob sizeδband velocity scalings vr,b-δb show a good agreement with the theoretical models.The variation in blob properties during the L-I and H-L transitions,and their relations to the scrape-off layer(SOL)density,edge and SOL turbulence,and SOL collisionality are discussed.The suppression of the edge(inside the last closed flux surface)turbulence is not reflected in the blob behavior,while the blob detection rate shows a correlation with the SOL density and its low-frequency(3–50 kH z)fluctuations.In addition,the blob detection rate is found to increase with the divertor collisionalityΛdiv,indicating a dependence of blob behavior onΛdiv.The differences in blob detection rates among the three operating regimes might be due to their different SOL densities and collisionalities.The investigation contributes to understanding the influences of edge and SOL plasma parameters on the blob behavior.

关 键 词：BLOBS I-MODE ELM-free H-mode lithium beam emission spectroscopy EAST 

分 类 号：TL631.24[核科学技术—核技术及应用]