On fast radial propagation of parametrically excited geodesic acoustic mode

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/105551

Title:	On fast radial propagation of parametrically excited geodesic acoustic mode
Authors:	陳騮;Qiu, Z.;Chen, L.;Zonca, F.
Contributors:	理學院物理學系
Keywords:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY;Acoustic propagation;AMPLITUDES;ANALYTICAL SOLUTION;DISPERSION RELATIONS;GEODESICS;Group velocity;IONS;LARMOR RADIUS;NONLINEAR PROBLEMS;NUMERICAL SOLUTION;Plasma physics;PULSES;SOUND WAVES;SPACE DEPENDENCE;TIME DEPENDENCE;VELOCITY;WAVE PROPAGATION
Date:	2015-04-01
Issue Date:	2026-04-23 12:35:48 (UTC+8)
Publisher:	American Institute of Physics;Melville: AIP Publishing
Abstract:	摘要： The spatial and temporal evolution of parametrically excited geodesic acoustic mode (GAM) initial pulse is investigated both analytically and numerically. Our results show that the nonlinearly excited GAM propagates at a group velocity which is, typically, much larger than that due to finite ion Larmor radius as predicted by the linear theory. The nonlinear dispersion relation of GAM driven by a finite amplitude drift wave pump is also derived, showing a nonlinear frequency increment of GAM. Further implications of these findings for interpreting experimental observations are also discussed. 出版者： Melville: AIP Publishing 出版日期： 2015-04-01 出處： Physics of Plasmas, 2015-04, Vol.22 (4) 資源來源： AIP Publishing 版權： 2015 AIP Publishing LLC. 識別號： ISSN: 1070-664X 識別號： EISSN: 1089-7674 識別號： DOI: 10.1063/1.4918944
Appears in Collections:	[Department of Physics] journal & Dissertation

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