Electrostatic solitary wave and double layer in a plasma with heavy ions and nonthermally distributed electrons

The existence condition for bump and dip type, as well as double layer (DL), solutions of electrostatic solitary waves (ESWs) in a nonthermal electron plasma with heavy ions is investigated by a pseudopotential method. It is found that the nonthermality of electrons determines the existence of the D...

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Bibliographic Details
Published in:Physics of plasmas 2010-09, Vol.17 (9), p.092904-092904-5
Main Authors: Choi, C.-R., Min, K.-W., Woo, M.-H., Ryu, C.-M.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHARGED PARTICLES
DENSITY
DIMENSIONLESS NUMBERS
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
HEAVY IONS
IONS
LEPTONS
MACH NUMBER
PHYSICAL PROPERTIES
PLASMA SHEATH
PLASMA WAVES
QUASI PARTICLES
SOLITONS
VELOCITY
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Summary:The existence condition for bump and dip type, as well as double layer (DL), solutions of electrostatic solitary waves (ESWs) in a nonthermal electron plasma with heavy ions is investigated by a pseudopotential method. It is found that the nonthermality of electrons determines the existence of the DL solution and that the amplitude of ESWs is enhanced by the density of heavy ions. When the heavy ion density is beyond a certain critical value, ESWs and DLs cannot exist. It is also found that both the lower and upper critical Mach numbers are reduced by the presence of heavy ions.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.3481465