An experiment to measure the electron–ion thermal equilibration rate in a strongly coupled plasma

Autor:	B Vigil, B.R. Haberle, John F. Benage, B Graden, Frederick J. Wysocki, Michael S. Murillo, R.P. Shurter, J. M. Taccetti, J.P. Roberts
Rok vydání:	2006
Předmět:	Materials science Absorption spectroscopy Thomson scattering General Physics and Astronomy Statistical and Nonlinear Physics Plasma Electron Spectral line Ion Physics::Plasma Physics Electron temperature Atomic physics Electron scattering Mathematical Physics
Zdroj:	Journal of Physics A: Mathematical and General. 39:4347-4351
ISSN:	1361-6447 0305-4470
Popis:	We present the most recent results from an experiment aimed at obtaining the temperature equilibration rate between ions and electrons in a strongly coupled plasma by directly measuring the temperature of each component. The plasma is formed by heating a sonic gas jet with a 10 ps laser pulse. The electrons are preferentially heated by the short pulse laser (we are aiming for Te ~ 100 eV), while the ions, after undergoing very rapid (sub-ps timescale) disorder-induced heating, should only reach a temperature of 10–15 eV. This results in a strongly coupled ion plasma with a Γii ~ 3–5. We plan to measure the electron and ion temperatures of the resulting plasma independently during and after heating, using collective Thomson scattering for electrons and a high-resolution x-ray spectrometer for the ions (measuring Doppler-broadened absorption lines). Theory indicates that the equilibration rate could be significantly lower than that given by the usual weakly coupled model (Landau–Spitzer) due to coupled collective modes present in the dense plasma.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ba4a8fd4f91e6067999d75fc2da99fec https://doi.org/10.1088/0305-4470/39/17/s06 Zobrazit plný text záznamu