Title :
On energy transformation mechanisms in dense turbulent plasma on radiating intense Z-pinches
Author :
Volkov, Nikolay B.
Author_Institution :
Inst. of Electrophys., Acad. of Sci., Moscow, Russia
Abstract :
Summary form only given. Deeney et al. (1998) experimentally established that the energy of a X-ray radiation from Z-pinch plasma can exceed its kinetic energy by several times. Rudakov et al. (2000) attempted to explain this fact with the help of a hypothesis on axial symmetrical magnetic "bubbles" originating as result of the MHD Rayleigh-Taylor instability. Lubetsky et al. (2000) showed experimentally, that value of effective resistance of Z-pinch plasma exceeds its theoretical value, according to the theory of Rudakov et al. by 2-3 times. To analyze energy transformation mechanisms a model of dense two-temperature plasma with developed turbulence (Volkov, 1999) is used in this report. The full intrinsic energy of Z-pinch plasma with developed turbulence includes together with average energies of electrons and ions an energy of velocity oscillations and an energy of magnetic field oscillations. The deviator of turbulent Maxwell stress tensor has a physical sense of a turbulent viscous tensor for electrons. Energy of turbulent oscillations of magnetic field is irreversible dissipated, as a result of padding heating of electrons. This is also promoted by intensive turbulent mixing. The complete system of dynamic equations, expressions for state equations and transport coefficients of turbulent Z-pinch plasma were obtained and studied. The comparison with results of experiments, known from the literature, was fulfilled.
Keywords :
Z pinch; plasma kinetic theory; plasma thermodynamics; plasma transport processes; plasma turbulence; MHD Rayleigh-Taylor instability; Z-pinch plasma; axial symmetrical magnetic bubbles; dense turbulent plasma; dense two-temperature plasma; effective resistance; energy transformation mechanisms; kinetic energy; radiating intense z-pinches; Electrons; Heating; Kinetic energy; Magnetic analysis; Magnetic fields; Magnetohydrodynamics; Maxwell equations; Plasma density; Plasma x-ray sources; Tensile stress;
Conference_Titel :
Pulsed Power Plasma Science, 2001. IEEE Conference Record - Abstracts
Conference_Location :
Las Vegas, NV, USA
Print_ISBN :
0-7803-7141-0
DOI :
10.1109/PPPS.2001.960766