Record Details

Title:
Electrostatic fluctuations in collisional plasmas
Affiliation(s):
EuXFEL staff, Other
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Abstract:
We present a theory of electrostatic fluctuations in two-component plasmas where electrons and ions are described by Maxwellian distribution functions at unequal temperatures. Based on the exact solution of the Landau kinetic equation, that includes electron-electron, electron-ion, and ion-ion collision integrals, the dynamic form factor, $S\left(\vec{k},\omega\right)$, is derived for weakly coupled plasmas. The collective plasma responses at ion-acoustic, Langmuir, and entropy mode resonances are described for arbitrary wave numbers and frequencies in the entire range of plasma collisionality. The collisionless limit of $S\left(\vec{k},\omega\right)$ and the strong-collision result based on the fluctuation-dissipation theorem and classical transport at $T_e=T_i$ are recovered and discussed. Results of several Thomson scattering experiments in the broad range of plasma parameters are described and discussed by means of our theory for $S\left(\vec{k},\omega\right)$.
Imprint:
USA, American Physical Society, 2017
Journal Information:
Physical Review E, 96 (4), 043207 (2017)
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Language(s):
English
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