A relativistic self-consistent model for studying enhancement of space charge limited field emission due to counter-streaming ions
- Title
- A relativistic self-consistent model for studying enhancement of space charge limited field emission due to counter-streaming ions
- Author
- Ming-Chieh Lin
- Keywords
- ELECTRON-EMISSION; CARBON NANOTUBES; METALS; DIODES; COLD; DISCHARGE; CATHODES; ARRAYS; STATES; FLOW
- Issue Date
- 2014-02
- Publisher
- AMER INST PHYSICS, 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
- Citation
- PHYSICS OF PLASMAS 권: 21 호: 2
- Abstract
- Recently, field emission has attracted increasing attention despite the practical limitation that field emitters operate below the Child-Langmuir space charge limit. By introducing counter-streaming ion flow to neutralize the electron charge density, the space charge limited field emission (SCLFE) current can be dramatically enhanced. In this work, we have developed a relativistic self-consistent model for studying the enhancement of SCLFE by a counter-streaming ion current. The maximum enhancement is found when the ion effect is saturated, as shown analytically. The solutions in non-relativistic, intermediate, and ultra-relativistic regimes are obtained and verified with 1-D particle-in-cell simulations. This self-consistent model is general and can also serve as a benchmark or comparison for verification of simulation codes, as well as extension to higher dimensions. (C) 2014 AIP Publishing LLC.
- URI
- http://aip.scitation.org/doi/10.1063/1.4866601http://hdl.handle.net/20.500.11754/47747
- ISSN
- 1070-664X; 1089-7674
- DOI
- 10.1063/1.4866601
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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