A fate of nonlinear evolution of drift waves: Excitation of nonlinear breathers
A fate of nonlinear evolution of drift waves: Excitation of nonlinear breathers
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DOI：
10.1063/5.0122295
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发表时间：
2022-12
影响因子：
2.2
通讯作者：
Y. Kosuga;S. Inagaki;Y. Kawachi
中科院分区：
文献类型：
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作者：
Y. Kosuga;S. Inagaki;Y. Kawachi
我们提出了漂移波可以发展成非线性呼吸波的证据。理论分析表明，二次流漂移波可以通过调制不稳定性激发非线性呼吸。研究发现，同时调制振幅和相位是呼吸激励的一个相关特征。利用这些特征来解释线性等离子体实验中漂移呼吸器的激发。漂移呼吸器被频繁地、间歇地激发。输运通量的瞬态增加也得到了证实。我们论证了呼吸激励的波幅存在一个临界条件。
We present the evidence that drift waves can develop into nonlinear breathers. The theoretical analysis predicts that drift waves with secondary flow can excite the nonlinear breather through modulational instability. It is found that the simultaneous modulation of both amplitude and phase is a relevant feature of breather excitation. These features are used to elucidate the excitation of drift breather in a linear plasma experiment. The drift breathers are found to be excited frequently and intermittently. The transient increase in the transport flux is also demonstrated. We argue that there exists a critical condition on the wave amplitude for breather excitation.