A general solution for space-charge limiting in one dimension
Computation of space-charge current-limiting effects across a vacuum cavity between parallel electrodes has previously been carried out only for thermionic emission spectra. In some applications, where the current arises from an injected electron beam or photo-Compton emission from electrode walls,...
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| Veröffentlicht in: | Journal of applied physics 2005-11, Vol.98 (10), p.103305-103305-6 |
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| container_end_page | 103305-6 |
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| container_issue | 10 |
| container_start_page | 103305 |
| container_title | Journal of applied physics |
| container_volume | 98 |
| creator | Preston, Eric F. Stringer, Thomas A. |
| description | Computation of space-charge current-limiting effects across a vacuum cavity between parallel electrodes has previously been carried out only for thermionic emission spectra. In some applications, where the current arises from an injected electron beam or photo-Compton emission from electrode walls, the electron energy spectra may deviate significantly from Maxwellian. Considering the space charge as a collisionless plasma, we derive an implicit equation for the peak cavity potential assuming steady-state currents. For the examples of graphite, nickel, and gold electrodes exposed to x rays, we find that cavity photoemission currents are typically more severely space-charge limited than they would be with the assumption of a purely Maxwellian energy distribution. |
| doi_str_mv | 10.1063/1.2136209 |
| format | Article |
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In some applications, where the current arises from an injected electron beam or photo-Compton emission from electrode walls, the electron energy spectra may deviate significantly from Maxwellian. Considering the space charge as a collisionless plasma, we derive an implicit equation for the peak cavity potential assuming steady-state currents. 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In some applications, where the current arises from an injected electron beam or photo-Compton emission from electrode walls, the electron energy spectra may deviate significantly from Maxwellian. Considering the space charge as a collisionless plasma, we derive an implicit equation for the peak cavity potential assuming steady-state currents. For the examples of graphite, nickel, and gold electrodes exposed to x rays, we find that cavity photoemission currents are typically more severely space-charge limited than they would be with the assumption of a purely Maxwellian energy distribution.</abstract><cop>United States</cop><pub>American Institute of Physics</pub><doi>10.1063/1.2136209</doi></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0021-8979 |
| ispartof | Journal of applied physics, 2005-11, Vol.98 (10), p.103305-103305-6 |
| issn | 0021-8979 1089-7550 |
| language | eng |
| recordid | cdi_osti_scitechconnect_20719798 |
| source | AIP Journals Complete; AIP Digital Archive |
| subjects | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY BEAM-PLASMA SYSTEMS COLLISIONLESS PLASMA ELECTRODES ELECTRON BEAMS ENERGY SPECTRA EQUATIONS GOLD GRAPHITE MATHEMATICAL SOLUTIONS NICKEL PHOTOEMISSION PLASMA DIAGNOSTICS SPACE CHARGE STEADY-STATE CONDITIONS THERMIONIC EMISSION WALL EFFECTS |
| title | A general solution for space-charge limiting in one dimension |
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