| Revista: | Brazilian journal of physics |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000330191 |
| ISSN: | 0103-9733 |
| Autores: | Deka, U1 Dwivedi, C.B2 |
| Instituciones: | 1Sikkim Manipal Institute of Technology, Department of Physics, Assam, Bharat. India 2Centre of Plasma Physics, Assam, Bharat. India |
| Año: | 2010 |
| Periodo: | Sep |
| Volumen: | 40 |
| Número: | 3 |
| Paginación: | 333-339 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, descriptivo |
| Resumen en inglés | Present contribution deals with the role of weak but finite electron inertia on the sheath formation condition. As reported earlier this becomes effective when the ions' drift velocity exceeds the phase velocity of the acoustic wave fluctuations. Such situation has natural existence near the sheath edge. Keeping this in mind we have revisited the problem of usual Bohm sheath condition. Analytical and numerical analysis have been performed to re-derive the local condition for plasma sheath formation. It is found that the weak but finite electron inertia reduces the threshold value of ion Mach number that may be, at least in principle, of qualitative value to define the sheath edge boundary. Consideration of finite but weak equilibrium electron flow at the defined sheath edge shrinks the width of non-neutral space charge layer over which major potential drop and charge imbalance occurs. Detailed numerical analysis and results of quantitative and qualitative importance are included in the text |
| Disciplinas: | Física y astronomía |
| Palabras clave: | Física, Teoría cinética y plasmas, Mecánica cuántica, Plasma, Vaina de Debye, Plasma de la prevaina, Borde de la vaina, Inercia de radiaciones electrónicas, Condición de Bohm |
| Keyword: | Physics and astronomy, Kinetic theory and plasma, Physics, Quantum mechanics, Plasma, Debye sheath, Presheath plasma, Sheath edge, Weak electron inertia, Bohm condition |
| Texto completo: | Texto completo (Ver HTML) |
