Evidence for high-m secondary islands induced by large low-m islands in a tokamak plasma -: art. no. 085001

被引:30
作者
Donné, AJH
van Gorkom, JC
Udintsev, VS
Domier, CW
Krämer-Flecken, A
Luhmann, NC
Schüller, FC
机构
[1] FOM, EURATOM Assoc, Inst Plasma Phys Rijnhuizen, NL-3430 BE Nieuwegein, Netherlands
[2] Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA
[3] EURATOM, Forschungszentrum, Inst Plasma Phys, NL-3430 BE Nieuwegein, Netherlands
关键词
D O I
10.1103/PhysRevLett.94.085001
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Small-scale structures with high poloidal mode numbers (m=10-20) have been observed in the TEXTOR tokamak plasma with pulsed radar reflectometry and an electron cyclotron emission diagnostic, in conjunction with large 2/1 and 1/1 islands. The small islands have a peaked density profile, similar to that of the simultaneously observed large-scale 2/1 islands. This together with the observation that high-frequency density and temperature fluctuations are very pronounced near the X points of the large islands hints to a strongly perturbed magnetic topology around the X points.
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