Studies of supersonic, radiative plasma jet interaction with gases at the Prague Asterix Laser System facility

Details Studies of supersonic, radiative plasma jet interaction with gases at the Prague Asterix Laser System facility Studies of supersonic, radiative plasma jet interaction with gases at the Prague Asterix Laser System facility

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phpl...15h2701n&link_type=abstract

Physics of Plasmas, Volume 15, Issue 8, pp. 082701-082701-18 (2008).

Physics

6

Laboratory Studies Of Space- And Astrophysical-Plasma Processes

Scientific paper

The interaction of laser driven jets with gas puffs at various pressures is investigated experimentally and is analyzed by means of numerical tools. In the experiment, a combination of two complementary diagnostics allowed to characterize the main structures in the interaction zone. By changing the gas composition and its density, the plasma cooling time can be controlled and one can pass from a quasiadiabatic outflow to a strongly radiation cooling jet. This tuning yields hydrodynamic structures very similar to those seen in astrophysical objects; the bow shock propagating through the gas, the shocked materials, the contact discontinuity, and the Mach disk. From a dimensional analysis, a scaling is made between both systems and shows the study relevance for the jet velocity, the Mach number, the jet-gas density ratio, and the dissipative processes. The use of a two-dimensional radiation hydrodynamic code, confirms the previous analysis and provides detailed structure of the interaction zone and energy repartition between jet and surrounding gases.

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