Experimental and theoretical study of quasicoherent fluctuations in enhanced D(alpha) plasmas in the Alcator C-Mod tokamak.
Experimental and theoretical study of quasicoherent fluctuations in enhanced D(alpha) plasmas in the Alcator C-Mod tokamak.
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DOI：
10.1103/physrevlett.89.225004
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发表时间：
2002-11
影响因子：
8.6
通讯作者：
A. Mazurenko;M. Porkolab;D. Mossessian;J. Snipes;X. Xu;W. Nevins
中科院分区：
文献类型：
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作者：
A. Mazurenko;M. Porkolab;D. Mossessian;J. Snipes;X. Xu;W. Nevins
本文报道了Alcator C-Mod托卡马克装置中在高密度下观测到的增强D（alpha）（EDA）H模准相干（QC）模的实验测量和理论研究的比较。QC模式是密度和磁场中的高频（约100 kHz）接近正弦波动，局限于等离子体边缘处的陡峭密度梯度（“基座”）中，典型波数k（R）约为3-6 cm（-1），k（θ）约为1.3 cm（-1）（中平面）。这里提出的QC模式是一种形式的电阻气球模式称为电阻X点模式，在合理的协议与预测的BOUT（边界等离子体湍流）代码。
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 ( approximately 100 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) approximately 3-6 cm(-1), k(theta) approximately 1.3 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.