A simulation study of protons heated by left/right-handed Alfven waves generated by electromagnetic proton-proton instability
A simulation study of protons heated by left/right-handed Alfven waves generated by electromagnetic proton-proton instability
复制标题
电磁质子-质子不稳定性产生的左/右手阿尔文波加热质子的模拟研究
DOI：
10.1088/2058-6272/ac11b0
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发表时间：
2021
影响因子：
1.7
通讯作者：
Sun Jicheng
中科院分区：
文献类型：
--
作者：
Yao Jiansheng;Zhao Yingkui;Ye Difa;Li Yi;Chai Lihui;Sun Jicheng
Most protons in the solar wind belong to one of two different populations, the less dense beam protons and the denser core protons. The beam protons, with a velocity of (1-2) VA (VA is the local Alfven speed), always drift relative to the core protons; this kind of distribution is unstable and stimulates several kinds of wave mode. In this study, using a 2D hybrid simulation model, we find that the original right-handed elliptically polarized Alfven waves become linearly polarized, and eventually become right-handed and circularly polarized. Given that linearly polarized waves are a superposition of left-handed and right-handed waves, cyclotron resonance in the right-handed/left-handed component heats beam/core protons perpendicularly. The resonance between beam protons and right-handed polarized waves is stronger when the beam relative density is lower, resulting in more dramatic perpendicular heating of beam protons, whereas the situation is reversed when the beam relative density is larger.
