Collisionless damping of short wavelength geodesic acoustic modes
Collisionless damping of short wavelength geodesic acoustic modes
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DOI：
10.1088/0741-3335/51/1/012001
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发表时间：
2008
影响因子：
2.2
通讯作者：
Z. Qiu;Liu Chen;F. Zonca
中科院分区：
文献类型：
--
作者：
Z. Qiu;Liu Chen;F. Zonca
研究了托卡马克等离子体大安全因子（q）区激发的测地声模（GAM）的无碰撞阻尼，考虑了有限离子Larmor半径和导引中心漂移轨道宽度以及平行电场贡献的影响.相应的解析表达式的阻尼率，包括高次谐波的离子渡越共振系统地推导出，并同意其有效性制度的数值结果。
Collisionless damping of geodesic acoustic mode (GAM) excited in the large safety factor (q) region of a tokamak plasma is investigated taking into account the effects of finite ion Larmor radius and guiding-center drift orbit width as well as parallel electric field contributions. A corresponding analytical expression for the damping rate including higher-order harmonics of ion transit resonances is systematically derived and agrees well with numerical results in its validity regime.