Coupled mode effects on energy transfer in weakly coupled, two-temperature plasmas

Vorberger, J.; Gericke, D. O.
August 2009
Physics of Plasmas;Aug2009, Vol. 16 Issue 8, p082702
Academic Journal
The effects of collective modes on the temperature relaxation in fully ionized, weakly coupled plasmas are investigated. A coupled mode (CM) formula for the electron-ion energy transfer is derived within the random phase approximation and it is shown how it can be evaluated using standard methods. The CM rates are considerably smaller than rates based on Fermi’s golden rule for some parameters and identical for others. It is shown how the CM effects are connected to the occurrence of ion acoustic modes and when they occur. Interestingly, CM effects occur also for plasmas with very high electron temperatures; a regime, where the Landau–Spitzer approach is believed to be accurate.


Related Articles

  • Measurement of preheat due to fast electrons in laser implosions of cryogenic deuterium targets. Yaakobi, B.; Stoeckl, C.; Seka, W.; Delettrez, J. A.; Sangster, T. C.; Meyerhofer, D. D. // Physics of Plasmas;Jun2005, Vol. 12 Issue 6, p062703 

    Preheat due to fast electrons generated by nonlinear laser-plasma interactions can reduce the gain in laser-imploded fusion targets. The first measurements of electron preheat in directly driven, imploding cryogenic-deuterium targets are reported. The preheat level is derived directly from the...

  • A calorimetric probe for plasma diagnostics. Stahl, Marc; Trottenberg, Thomas; Kersten, Holger // Review of Scientific Instruments;Feb2010, Vol. 81 Issue 2, p023504 

    A calorimetric probe for plasma diagnostics is presented, which allows measurements of the power taken by a test substrate. The substrate can be biased and used as an electric probe in order to obtain information about the composition of the total heating power. A new calibration technique for...

  • Plasma-field structures during relativistic laser interaction with overdense plasmas at finite electron temperatures. Korzhimanov, A. V.; Kim, A. V. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Mar2010, Vol. 55 Issue 2, p287 

    A simple model taking into account the effect of electron temperature is derived to define the plasma-field structures which may arise during relativistically intense laser interaction with overdense plasmas. We show that there exist multilayer solutions with electron cavitation, allowing for...

  • Influence of slow particle dynamics on transport in stochastic plasmas. Predebon, I.; Paccagnella, R. // Physics of Plasmas;Aug2007, Vol. 14 Issue 8, p082310 

    A kinetic approach to the derivation of the particle and energy fluxes in a stochastic plasma is described, taking into account a full spectrum of particle velocities. Sometimes low v∥’s are considered to have negligible importance in the evaluation of the transport coefficients. We...

  • Tachyonic γ-ray bursts generated by nonlocal plasma currents. Tomaschitz, Roman // European Physical Journal C -- Particles & Fields;Aug2010, Vol. 69 Issue 1/2, p241 

    The dispersion relations of superluminal wave propagation in electron plasmas are derived, and the tachyonic energy flux, the velocity of energy transport, and the relaxation time asymptotics of the conductivity are studied. The formalism is based on Maxwell-type equations for Proca fields with...

  • Self-proton/ion radiography of laser-produced proton/ion beam from thin foil targets. Paudel, Y.; Renard-Le Galloudec, N.; Nicolai, Ph.; d'Humieres, E.; Ya. Faenov, A.; Kantsyrev, V. L.; Safronova, A. S.; Shrestha, I.; Osborne, G. C.; Shlyaptseva, V. V.; Sentoku, Y. // Physics of Plasmas;Dec2012, Vol. 19 Issue 12, p123101 

    Protons and multicharged ions generated from high-intensity laser interactions with thin foil targets have been studied with a 100 TW laser system. Protons/ions with energies up to 10 MeV are accelerated either from the front or the rear surface of the target material. We have observed for the...

  • Trapped particle dynamics in toroidally rotating plasmas. Hahm, T. S. // Physics of Fluids B: Plasma Physics;Dec92, Vol. 4 Issue 12, p4046 

    A detailed single particle orbit analysis in toroidally rotating plasma yields new analytical formulas for the second adiabatic invariant, the bounce frequency, and the precession frequency up to the first-order correction in ρpi (poloidal ion gyroradius)/Lv (scale length of rotation...

  • Comments on particle and energy balance in the edge plasma of Alcator C-Mod. Umansky, M.V.; Krasheninnikov, S.I.; LaBombard, B.; Terry, J.L. // Physics of Plasmas;Sep98, Vol. 5 Issue 9, p3373 

    Observes the particle and energy balance in the edge plasma of Alcator C-Mod. Measurement of neutral gas pressure and ionization source strength in the main chamber; Dominance of plasma flow in the scrape-off layer (SOL); Details on the diffusion coefficient of the cross-field particle...

  • The spectrum of the curl operator on spherically symmetric domains. Cantarella, Jason; DeTurck, Dennis; Gluck, Herman; Teytel, Mikhail // Physics of Plasmas;Jul2000, Vol. 7 Issue 7 

    This paper presents a mathematically complete derivation of the minimum-energy divergence-free vector fields of fixed helicity, defined on and tangent to the boundary of solid balls and spherical shells. These fields satisfy the equation ∇xV=λV, where λ is the eigenvalue of curl...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics