The Formation of Electron Heat Flux Over the Sunlit Quiet Polar Cap Ionosphere
The Formation of Electron Heat Flux Over the Sunlit Quiet Polar Cap Ionosphere
复制标题
阳光照射的安静极帽电离层上电子热通量的形成
DOI：
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发表时间：
2019
影响因子：
5.2
通讯作者：
E. Zesta
中科院分区：
文献类型：
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作者：
G. Khazanov;D. Sibeck;E. Zesta
我们考虑一种新的机制的热电子热通量的形成在阳光照射的极冠的存在下的潜在的跳跃所产生的光电子逃逸沿着开放的磁场线。进入磁层的光电子经历小的库仑碰撞散射，其光谱的低能量部分被困在电位跳跃和上电离层之间，产生热电子能量通量，支持电离层高度的电子温度的形成。这一机制消除了为解释顶侧电离层中测得的电子温度而假设电离层上边界处任意电子热通量的习惯做法的需要。
We consider a new mechanism for the thermal electron heat fluxes formation over the sunlit polar cap in the presence of the potential jumps that are created by the photoelectron escape along the open magnetic field lines. Photoelectrons traveling into the magnetosphere experience small Coulomb collisional scattering, and the low‐energy part of their spectra becomes trapped between the potential jump and upper ionosphere creating the thermal electron energy fluxes that support the formation of electron temperature at the ionospheric altitudes. This mechanism eliminates the need for the customary practice of assuming arbitrary electron heat fluxes at the upper ionospheric boundary in order to explain the measured electron temperature in the topside ionosphere.