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Title: Thermal effects and space-charge limited transition in crossed-field devices

Abstract

A fully kinetic model for the electron flow in a crossed field device is derived and used to determine the system stationary states. It is found that for low injection temperatures, there is a simultaneous presence of distinct stationary solutions and an abrupt transition between accelerating and space-charge limited regimes. On the other hand, for high injection temperatures, there is only a single stationary solution branch and the change between the regimes becomes continuous. For intermediate temperatures, it is then identified a critical point that separates the abrupt and continuous behaviors. It is also investigated how intrinsic space-charge oscillations may drive stationary states unstable in certain parameter regimes. The results are verified with N-particle self-consistent simulations.

Authors:
; ;  [1]
  1. Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, 91501-970 Porto Alegre, RS (Brazil)
Publication Date:
OSTI Identifier:
22303799
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CROSSED FIELDS; ELECTRONS; EQUIPMENT; MATHEMATICAL SOLUTIONS; OSCILLATIONS; SIMULATION; SPACE CHARGE; TEMPERATURE DEPENDENCE

Citation Formats

Marini, Samuel, Rizzato, Felipe B., and Pakter, Renato. Thermal effects and space-charge limited transition in crossed-field devices. United States: N. p., 2014. Web. doi:10.1063/1.4893313.
Marini, Samuel, Rizzato, Felipe B., & Pakter, Renato. Thermal effects and space-charge limited transition in crossed-field devices. United States. doi:10.1063/1.4893313.
Marini, Samuel, Rizzato, Felipe B., and Pakter, Renato. Fri . "Thermal effects and space-charge limited transition in crossed-field devices". United States. doi:10.1063/1.4893313.
@article{osti_22303799,
title = {Thermal effects and space-charge limited transition in crossed-field devices},
author = {Marini, Samuel and Rizzato, Felipe B. and Pakter, Renato},
abstractNote = {A fully kinetic model for the electron flow in a crossed field device is derived and used to determine the system stationary states. It is found that for low injection temperatures, there is a simultaneous presence of distinct stationary solutions and an abrupt transition between accelerating and space-charge limited regimes. On the other hand, for high injection temperatures, there is only a single stationary solution branch and the change between the regimes becomes continuous. For intermediate temperatures, it is then identified a critical point that separates the abrupt and continuous behaviors. It is also investigated how intrinsic space-charge oscillations may drive stationary states unstable in certain parameter regimes. The results are verified with N-particle self-consistent simulations.},
doi = {10.1063/1.4893313},
journal = {Physics of Plasmas},
number = 8,
volume = 21,
place = {United States},
year = {Fri Aug 15 00:00:00 EDT 2014},
month = {Fri Aug 15 00:00:00 EDT 2014}
}