Nonlinear three-mode interaction and drift-wave turbulence in a tokamak edge plasma
Nonlinear three-mode interaction and drift-wave turbulence in a tokamak edge plasma
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DOI：
10.1063/1.2184291
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发表时间：
2006-04-01
影响因子：
2.2
通讯作者：
Morrison, PJ
中科院分区：
文献类型：
--
作者：
Batista, AM;Caldas, IL;Morrison, PJ
本文用一个具有二次非线性和线性增长/衰减率的三波相互作用模型研究了托卡马克边缘等离子体中由压力梯度驱动的漂移波湍流的发生。模型参数取自托卡马克边缘区域浮置静电势的一组典型测量值。三波相互作用模型所表现出的时间动力学的一些方面进行了研究，特别强调了一个混乱的政权，发现在很宽的范围内的波衰减率。观察到从周期到混沌行为的间歇性过渡，并探讨了一些统计特性，如爆发间隔和层流长度间隔持续时间。(c)2006年，美国物理学会。
A three-wave interaction model with quadratic nonlinearities and linear growth/decay rates is used to investigate the occurrence of drift-wave turbulence driven by pressure gradients in the edge plasma of a tokamak. Model parameters are taken from a typical set of measurements of the floating electrostatic potential in the tokamak edge region. Some aspects of the temporal dynamics exhibited by the three-wave interaction model are investigated, with special emphasis on a chaotic regime found for a wide range of the wave decay rate. An intermittent transition from periodic to chaotic behavior is observed and some statistical properties, such as the interburst and laminar length interval durations, are explored.(c) 2006 American Institute of Physics.