Khotyaintsev Yu V, Graham D B, Steinvall K, Alm L, Vaivads A, Johlander A, Norgren C, Li W, Divin A, Fu H S, Hwang K-J, Burch J L, Ahmadi N, Le Contel O, Gershman D J, Russell C T, Torbert R B
Swedish Institute of Space Physics, Uppsala 75121, Sweden.
Department of Space and Plasma Physics, School of Electrical Engineering and Computer Science, KTH Royal Institute of Technology, Stockholm 11428, Sweden.
Phys Rev Lett. 2020 Jan 31;124(4):045101. doi: 10.1103/PhysRevLett.124.045101.
We report electrostatic Debye-scale turbulence developing within the diffusion region of asymmetric magnetopause reconnection with a moderate guide field using observations by the Magnetospheric Multiscale mission. We show that Buneman waves and beam modes cause efficient and fast thermalization of the reconnection electron jet by irreversible phase mixing, during which the jet kinetic energy is transferred into thermal energy. Our results show that the reconnection diffusion region in the presence of a moderate guide field is highly turbulent, and that electrostatic turbulence plays an important role in electron heating.
我们利用磁层多尺度任务的观测结果，报告了在具有适度引导磁场的不对称磁层顶重联扩散区域内发展的静电德拜尺度湍流。我们表明，布内曼波和束流模式通过不可逆相位混合导致重联电子喷流高效快速热化，在此过程中喷流动能转化为热能。我们的结果表明，存在适度引导磁场时的重联扩散区域高度湍流，并且静电湍流在电子加热中起重要作用。
