High efficient ultrahigh acceleration of plasma blocks by PW-ps laser pulses for producing fusion flames in DT and HB11 of solid state density

8th International Conference on Inertial Fusion Sciences and Applications

Moustaizis, S.^1 ; Lalousis, P.^2 ; Hora, H.^3 ; Miley, G.H.^4

Technical University of Crete, Science Department, Chania, Greece^1

Institute of Electron Structure and Lasers FORTH, Heraklion, Greece^2

Department of Theoretical Physics, University of New South Wales, Australia^3

Dept. Nuclear, Plasma and Radiol.Engineering, Univ. Illinois, Urbana

IL, United States^4

关键词: Deuterium-tritium;    Direct conversion;    Nanosecond range;    Nonlinear (ponderomotive) force;    Pulsed magnetic fields;    Solid-state density;    Thermal process;    Ultra-high accelerations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012074/pdf
DOI  :  10.1088/1742-6596/688/1/012074

来源: IOP

【 摘 要 】

Ultrahigh acceleration of plasma blocks in the range of 1020cm/s2has been confirmed experimentally after this was long predicted as a non-thermal direct conversion of optical energy into plasma motion due to dominating nonlinear (ponderomotive) forces [1]. The use of laser pulses of more than PW power and ps or shorter duration can ignite a nuclear fusion flame in solid density deuterium tritium because the necessary energy flux of >108J/cm2according to the theory of Chu [2] is available [3]. For the studies of the necessary velocities of the generated fusion flames above 1000 km/s the detailed processes can be analyzed by using the advanced genuine two-fluid hydrodynamic model [4] where it was surprising that the ignition of the fusion flame by the picosecond interaction needs a comparably long development in the nanosecond range before the thermal processes result in shock fronts similar to the Rakine-Hugoniot theory. For the evaluation of power generation the problem of lateral energy losses was studied by using very high pulsed magnetic fields. The recently produced 10 Kilotesla magnetic fields [5] are very promising for solutions.