Nonlinear excitation of a geodesic acoustic mode by reversed shear Alfvén eignemodes

• 作者: Yahui WANG Tao WANG Shizhao WEI Zhiyong QIU
• 来源期刊: 等离子体科学和技术（英文版）
• 年，卷（期）: 2022,（2）
• 所属期刊栏目: MAGNETICALLY CONFINED PLASMA
• 页码范围: 57-61
• 页数: 5页
• 语种: 英文

摘要

The parametric decay process of a reversed shear Alfvén eigenmeode(RSAE)into a geodesic acoustic mode and a kinetic RSAE is investigated using nonlinear gyrokinetic theory.The excitation conditions mainly require the pump RSAE amplitude to exceed a certain threshold,which could be readily satisfied in burning plasmas operated in steady-state advanced scenario.This decay process can contribute to thermal plasma heating and confinement improvement.