New light on ion acoustic solitary waves in a plasma with two-temperature electrons

Autor:	T. K. Baluku, Manfred A. Hellberg, Frank Verheest
Rok vydání:	2010
Předmět:	Physics Nonlinear Sciences::Exactly Solvable and Integrable Systems General Physics and Astronomy Electron temperature Plasma Electron Phase velocity Atomic physics Third derivative Ion acoustic wave Korteweg–de Vries equation Nonlinear Sciences::Pattern Formation and Solitons Ion
Zdroj:	EPL (Europhysics Letters). 91:15001
ISSN:	1286-4854 0295-5075
DOI:	10.1209/0295-5075/91/15001
Popis:	Ion acoustic solitary waves in two-temperature electron plasmas have been studied in the past, and negative-potential solitons and double layers found, in addition to positive-potential solitons. Here, further investigations show that positive-potential double layers can form below a critical density ratio, associated with the third derivative of the Sagdeev potential evaluated at the origin for the phase velocity of the linear wave. For density ratios that support positive double layers, solitons are also reported beyond the double layers, depending on the cool-to-hot electron temperature ratio. In addition, when both polarities can be supported, solitary structures can propagate at the acoustic speed, contrary to a KdV prescription.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9a7ced54ae9d25423e86c140d7809f59 https://doi.org/10.1209/0295-5075/91/15001 Zobrazit plný text záznamu