摘要
In this study,we investigate the generation of parametric decay instability,Langmuir turbulence formation,and electron acceleration in ionospheric heating via a two-fluid model using the Fokker-Planck equation and Vlasov-Poisson system simulations.The simulation results of both the magnetofluid model and the kinetic model demonstrate the dynamics of electron acceleration.Further,the results of the Vlasov-Poisson simulations suggest the formation of electron holes in phase space at the same spatial scale as the Langmuir wave,which are shown to be related to electron acceleration.In addition,electron acceleration is enhanced through the extension of the wavenumber spectrum caused by strong Langmuir turbulence,leading to more electron holes in phase space.
基金
supported by the National Natural Science Foundation of China (NSFC Grant Nos. 42104150, 42074187, 41774162, and 41704155)
the Foundation of the National Key Laboratory of Electromagnetic Environment (Grant No. 6142403200303)
the Chinese Academy of Sciences, Key Laboratory of Geospace Environment
the University of Science & Technology of China (Grant No. GE2020-01)
the Fundamental Research Funds for the Central Universities (Grant No. 2042021kf0020)
the Excellent Youth Foundation of Hubei Provincial Natural Science Foundation (Grant No. 2019CFA054)
