Enhancement of emission currents in plasma electron sourcesbased on a low-pressure arc discharge
| Parent link: | Journal of Physics: Conference Series Vol. 652 : Gas Discharge Plasmas and Their Applications (GDP 2015).— 2015.— [012061, 6 p.] |
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| Summary: | Title screen The paper reports on a theoretical and experimental study of the discharge plasma generation with an enhanced electron emission current in a plasma electron source based on a low-pressure arc discharge with a grid-stabilized plasma emission boundary. The source operates at a pressure in the working chamber of р=0.02-0.05 Pa (Ar), accelerating voltage of up to U[a]=10 kV, and longitudinal magnetic field for electron beam transport of up to B[z]=0.1 T. The experiments show that in the mode of electron emission from the plasma, the voltage Ud between the cathode and grid electrode changes its sign. The numerical simulation demonstrates that the plasma potential and voltage U[d] depend on the electric field penetrating from the acceleration gap into the discharge region through the grid meshes, and on the discharge current, gas pressure, geometric transparency of the grid, and gas kind. It is shown that the main mechanisms responsible for the increase in the discharge current and electron emission current from the plasma are associated with secondary ion-electron emission from the emission electrode and with positive feedback between the region of cathode plasma generation and the channel of electron beam transport. Режим доступа: по договору с организацией-держателем ресурса |
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2015
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| Online Access: | http://dx.doi.org/10.1088/1742-6596/652/1/012061 http://earchive.tpu.ru/handle/11683/18233 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=644631 |