Fluctuations in collisional plasma in the presence of an external electric field

Journal Article · Sat Oct 15 04:00:00 EDT 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3646363· OSTI ID:22046935

Momot, A I ^[1]; Zagorodny, A G ^[2]

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1. Faculty of Physics, Taras Shevchenko National University of Kyiv, 4, Academician Glushkov Str., Kyiv 03680 (Ukraine)
2. M. M. Bogolubov Institute for Theoretical Physics, National Academy Science of Ukraine, 14b, Metrologichna Str., Kyiv 03680 (Ukraine)

The theory of large-scale fluctuations in a plasma is used to calculate the correlations functions of electron and ion density with regard to particle collisions described within the Bhatnagar-Gross-Krook (BGK) model and the presence of a constant external electric field. The changes of plasma particle distribution functions due to an external electric field and their influence on the plasma dielectric response are taken into account. The dispersion relations for longitudinal waves in such a plasma are studied in details. It is shown that external electric field can lead to the ion-acoustic wave instability and anomalous growth of the fluctuation level. Detailed numerical studies of the general relations for electron number density fluctuations are performed and the effect of external electric field on the fluctuation spectra is studied.

• OSTI ID: 22046935
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 18; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BERNSTEIN MODE
COLLISIONAL PLASMA
CORRELATION FUNCTIONS
DIELECTRIC PROPERTIES
DISPERSION RELATIONS
DISTRIBUTION FUNCTIONS
ELECTRIC FIELDS
ELECTRONS
FLUCTUATIONS
ION ACOUSTIC WAVES
ION DENSITY
NUMERICAL ANALYSIS
PLASMA DENSITY
PLASMA INSTABILITY