Parametric instabilities in a two ion species plasma as a driver of super Alfvénic waves. (September 2020)

• Record Type: Journal Article
• Authors: Matsukiyo, S.
• Is Part Of: Journal of physics. Volume 1620(2020)
• Publication Date: 2020-09
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1620/1/012013
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: Linear dispersion relation of parametric instabilities of a left hand circularly polarized wave in a three species plasma consisting electrons, protons, and α particles is derived and the obtained dispersion relation is numerically solved. It is shown that the so-called super Alfvénic waves, which are thought to play important roles in preferential acceleration of heavy ions, can get excited through a parametric decay instability when the parent wave is on the proton cyclotron branch and the plasma beta is sufficiently low. A variety of other parametric instabilities are also generated.