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Author Macheret, Sergey O. ♦ Tholeti, Siva Sashank ♦ Alexeenko, Alina A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ANODES ♦ ARGON ♦ ATOMS ♦ CATHODES ♦ COLLISIONS ♦ CURRENT DENSITY ♦ ELECTRIC POTENTIAL ♦ FIELD EMISSION ♦ IONIZATION ♦ IONS ♦ MOLECULES ♦ MONTE CARLO METHOD ♦ NANOTUBES ♦ PLASMA DENSITY ♦ SIMULATION ♦ SPACE CHARGE
Abstract A principle of microplasma generation that utilizes field emission of electrons at the cathode and field ionization producing ions at the anode, both processes relying on nanorods or nanotubes, is explored theoretically. In this plasma generation concept, collisional ionization of atoms and molecules by electron impact would play a negligible role. Analytical estimates as well as plasma kinetic modeling by particle-in-cell method with Monte Carlo collisions in argon confirm that this principle can enable substantial plasma densities at near-collisionless microgaps, while requiring relatively low voltages, less than 100 V. An order of magnitude increase in electron number density can be achieved due to enhancement of field emission at the cathode by positive space charge at high field ionization ion current densities.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-05-09
Publisher Place United States
Journal Applied Physics Letters
Volume Number 108
Issue Number 19


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