A simulation study of protons heated by left/right-handed Alfvén waves generated by electromagnetic proton-proton instability

作     者：姚建生 赵英奎 叶地发 李毅 柴立晖 孙继承 Jiansheng YAO;Yingkui ZHAO;Difa YE;Yi LI;Lihui CHAI;Jicheng SUN

作者机构：Institute of Applied Physics and Computational MathematicsBeijing 100088People's Republic of China CAS Key Lab of Geospace EnvironmentSchool of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026People's Republic of China Key Laboratory of Earth and Planetary PhysicsInstitute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029People's Republic of China Key Laboratory of Polar ScienceMinistry of Natural ResourcesShanghai 200020People's Republic of China MNR Key Laboratory for Polar SciencePolar Research Institute of ChinaShanghai 200136People's Republic of China 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2021年第23卷第12期

页      面：55-62页

核心收录：

学科分类：070802[理学-空间物理学] 07[理学] 0708[理学-地球物理学] 0702[理学-物理学] 

基　　金：supported by National Natural Science Foundation of China(Nos.11822401 41674177 and 41874208) 

主　　题：proton/proton instability hybrid simulation Alfvén waves 

摘      要：Most protons in the solar wind belong to one of two different populations,the less dense beam protons and the denser core *** beam protons,with a velocity of(1-2)V_(A)(V_(A)is the local Alfvén speed),always drift relative to the core protons;this kind of distribution is unstable and stimulates several kinds of wave *** this study,using a 2 D hybrid simulation model,we find that the original right-handed elliptically polarized Alfvén waves become linearly polarized,and eventually become right-handed and circularly *** 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 *** 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.