The electron energy distribution during HF pumping, a picture painted with all colors
نویسندگان
چکیده
The shape of the electron energy distribution has long been a central question in the field of high-frequency radio-induced optical emission experiments. This report presents estimates of the electron energy distribution function, , from 0 to 60 based on optical multiwavelength (6300, 5577, 8446, 4278 ̊ ) data and 930incoherent scatter radar measurements of ion temperature, electron temperature and electron concentration. According to our estimate, the electron energy distribution has a depression at around 2 , probably caused by electron excitation of vibrational states in N , and a high energy tail that is clearly supra-thermal. The temporal evolution of the emissions indicates that the electron temperature still plays an important role in providing electrons with energies close to 2 . At the higher energies the electron energy distribution has a non-thermal tail.
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