Simulation of electron field emission from the surface of ionic crystals under irradiation by pulsed electron beam
| Parent link: | Известия вузов. Физика: научный журнал.— , 1957- Т. 55, № 11/3.— 2012.— [С. 232-235] |
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| Summary: | Заглавие с экрана On the basis of the phenomenological model of field emission we calculated current density of field emission from the surface irradiated by pulsed electron beam for a series of ionic crystals when changing parameters of the beam. The results of calculations show that after a certain period of time relative to the start of irradiation there is a sharp increase in current density of the field emission. The factor that determines the beginning of the field emission is the value of energy of the electron affinity. When the electric field near the irradiated surface and the concentration of nonequilibrium electrons reach some critical value, the current density field emission starts to become more current density pulsed electron beam. As a result, the criterion of the system stability violates, which at the beginning leads to appearance of bifurcations, and then stochastic high-frequency oscillations in the system. Most clearly this instability as a bifurcation or stochastic oscillations can be seen in LiF and KCl crystals with low electron affinity. Instability processes of the field emission current are implemented for other ionic crystals (NaCl, CaF 2, KI) but at higher excitation densities. Режим доступа: по договору с организацией-держателем ресурса |
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2012
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| Online Access: | http://elibrary.ru/item.asp?id=19015598 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=641041 |