Experimental and theoretical study of quasicoherent fluctuations in enhanced Dα plasmas in the Alcator C-Mod tokamak -: art. no. 225004

被引：95

作者：

Mazurenko, A

Porkolab, M

Mossessian, D

Snipes, JA

Xu, XQ

Nevins, WM

机构：

[1] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.89.225004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A comparison of experimental measurements and theoretical studies of the quasicoherent (QC) mode, observed at high densities during enhanced D-alpha (EDA) H mode in the Alcator C-Mod tokamak, are reported. The QC mode is a high frequency (similar to100 kHz) nearly sinusoidal fluctuation in density and magnetic field, localized in the steep density gradient ("pedestal") at the plasma edge, with typical wave numbers k(R)approximate to3-6 cm(-1), k(theta)approximate to1.3 cm(-1) (midplane). It is proposed here that the QC mode is a form of resistive ballooning mode known as the resistive X-point mode, in reasonable agreement with predictions by the BOUT (boundary-plasma turbulence) code.

引用

页数：4

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