We study kinetic evolution of nonequilibrium optically thick electron-positron plasma towards thermal equilibrium solving numerically relativistic Boltzmann equations with energy per particle ranging from 0.1 to 10 MeV. We generalize our results presented in [1], considering proton loading of the pair plasma. Proton loading introduces new characteristic timescales essentially due to proton-proton and proton-electron Coulomb collisions. Taking into account not only binary but also triple direct and inverse interactions between electrons, positrons, photons and protons we show that thermal equilibrium is reached on a timescale tth 10-11 sec. © 2009 American Institute of Physics.
Thermalization of pair plasma with proton loading / A. G., Aksenov; RUFFINI, Remo; G. V., Vereshchagin. - In: AIP CONFERENCE PROCEEDINGS. - ISSN 0094-243X. - 1111:(2009), pp. 344-350. ((Intervento presentato al convegno International Conference on Probing Stellar Populations Out To The Distant Universe, Cefalu 2008 tenutosi a Cefalu; Italy nel 7 September 2008 through 19 September 2008 [10.1063/1.3141571].
Thermalization of pair plasma with proton loading
RUFFINI, Remo;
2009
Abstract
We study kinetic evolution of nonequilibrium optically thick electron-positron plasma towards thermal equilibrium solving numerically relativistic Boltzmann equations with energy per particle ranging from 0.1 to 10 MeV. We generalize our results presented in [1], considering proton loading of the pair plasma. Proton loading introduces new characteristic timescales essentially due to proton-proton and proton-electron Coulomb collisions. Taking into account not only binary but also triple direct and inverse interactions between electrons, positrons, photons and protons we show that thermal equilibrium is reached on a timescale tth 10-11 sec. © 2009 American Institute of Physics.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
