外日球层的宽能段离子及其与湍动的耦合作用  

Broad Energy-Band Ions in the Ourter Heliosphere and Their Coupling with Turbulence

作　　者：何建森[1,2] 林荣 崔博 王玲华[1,2] 宗秋刚[1,2] HE Jiansen;LIN Rong;CUI Bo;WANG Linghua;ZONG Qiugang(School of Earth and Space Sciences,Peking University,Beijing 100871,China;Peking University Planetary and Space Science Research Center,Beijing 100871,China)

机构地区：[1]北京大学地球与空间科学院,北京100871 [2]北京大学行星与空间科学研究中心,北京100871

出　　处：《深空探测学报（中英文）》2020年第6期574-583,共10页Journal Of Deep Space Exploration

基　　金：民用航天技术预研空间科学资助项目(D020301);国家自然科学学基金资助项目(41874200)。

摘　　要：围绕“日球层太阳风及其与侵入星际风的作用”这个主题,从目前认知、前沿问题、探测建议等3方面展开论述。日球层中的离子包括:原初太阳风离子、源于星际风的拾起离子、超热离子。其中拾起离子和超热离子有来自局地星际质侵入流的贡献。深空飞船探测到双模态遍布日球层:日球层内边界、太阳风、行星际湍动、超热离子能谱等都存在双模态特征。前沿问题有3个方面:①从未到达的领域,即黄道面里的日球层尾部以及高纬的外日球层;②曾经到达的领域,但是没有探测的物理量,例如外日球层中的拾起离子;③曾经到达并探测,但是形成机制不明,例如超热离子的幂律谱及其双模态。针对上述前沿问题,本文提出如下的建议:①设计不同的飞行路径,朝向不同的方位进行探测;②携带宽能段的离子谱仪器包涵盖原初太阳风等离子体、拾起离子和超热离子;③搭载高灵敏度磁强计测量外日球层的可压缩磁湍动。This paper focuses on the theme of“solar wind in the heliosphere and its interaction with the invading interstellar wind”,and discusses it from three aspects:current cognition,frontier problems,and exploration suggestions.The ions in the heliosphere include primary solar wind ions,pick-up ions converted partially from interstellar wind,and super-thermal ions.Among them,pick-up ions and super-thermal ions have their contribution from the local interstellar medium flow.The deep-space spacecraft have detected the prevalence of two modes in the heliosphere:the inner boundary of the heliosphere,the solar wind,the interplanetary turbulence,and the energy spectrum of the super-thermal ions.There are three types of cutting-edge issues:①the territory never reached,that is,the tail of the heliosphere in the ecliptic plane and the outer heliosphere at high latitudes;②the territory that has been reached,but some key variables have not been detected,such as the picked-up ions in the outer heliosphere;③the territory and variables that have been reached and detected,but the formation mechanism is unknown,such as the power-law spectrum and dual-mode of the super-thermal ions.To address these problems,we put forward the following suggestions:①to design different flight paths and detect in different directions;②to carry ion spectra instruments with wide energy band,covering the primary solar wind plasma,the pick-up ions,and the super-thermal ions;③to carry high sensitivity magnetometer to measure the compressible magnetic turbulence in the outer heliosphere.

关 键 词：外日球层 星际风 粒子谱 

分 类 号：P353[天文地球—空间物理学]