Estimating the Radial Profile of Edge Plasma Electrical Fluctuations in the IR-T1 Tokamak  

作　　者：K.Mikaili Agah M.Ghoranneviss M.K.Salem A.Salar Elahi S.Mohammadi R.Arvin 

机构地区：[1]Plasma Physics Research Center,Science and Research Branch,Islamic Azad University,Tehran,Iran

出　　处：《Chinese Physics Letters》2013年第2期165-168,共4页中国物理快报（英文版）

摘　　要：The radial dependence of edge plasma turbulence is investigated in the IR-T1 tokamak.The radial profile of the fluctuation level and spectra are measured using an array of Langmuir probes(rake probe)in the r/a=0.75-1.2 region.In all radial positions the edge plasma is turbulently unstable,with a broad band fluctuation spectrum in the frequency range f=10-1000 kHz.The relative fluctuation level,as monitored by the ion saturation current J_(+),is always highest near the wall and decreases monotonically toward the plasma center,while the shape of the fluctuation power spectra is almost unchanged.The result of this experiment shows that in contrast to the more inner regions,the plasma near the wall does not simply have a small density fluctuation about a mean,but rather a shredded structure in which one can imagine that discrete shreds of plasma interact with one another rather than with the average background.

关 键 词：Plasma unchanged UNSTABLE 

分 类 号：TL6[核科学技术—核技术及应用]