10.7910/DVN/LOAT9C R. Jorge, P. Ricci, S. Brunner, S. Gamba, V. Konovets, N. F. Loureiro, L. M. Perrone, N. Teixeira Harvard Dataverse 2018 Physics Boltzmann equation collision operators polynomial expansions spectra waves 2018-12-04 10.7910/DVN/LOAT9C/OTK1FN 987996 application/pdf 1.0 Custom terms specific to this dataset The dynamics of electron-plasma waves are described at arbitrary collisionality by considering the full Coulomb collision operator. The description is based on a Hermite- Laguerre decomposition of the velocity dependence of the electron distribution function. The damping rate, frequency, and eigenmode spectrum of electron-plasma waves are found as functions of the collision frequency and wavelength. A comparison is made between the collisionless Landau damping limit, the Lenard-Bernstein and Dougherty collision operators, and the electron-ion collision operator, finding large deviations in the damping rates and eigenmode spectra. A purely damped entropy mode, characteristic of a plasma where pitch-angle scattering effects are dominant with respect to collisionless effects, is shown to emerge numerically, and its dispersion relation is analytically derived. It is shown that such a mode is absent when simplified collision operators are used, and that like-particle collisions strongly influence the damping rate of the entropy mode. <a href="http://library.psfc.mit.edu/catalog/reports/2010/18ja/18ja032/abstract.php">PSFC REPORT PSFC/JA-18-32</a><br /><br />N.F. Loureiro was partially funded by the U.S. Department of Energy Grant No. DE-FG02-91ER54109.