Author/Authors :
Boreham، نويسنده , , Bruce W. and Bolton، نويسنده , , P.R. and Newman، نويسنده , , D.S. and Hora، نويسنده , , Heinrich and Aydin، نويسنده , , M. and Azechi، نويسنده , , H. and Cicchitelli، نويسنده , , L. and Eliezer، نويسنده , , S. and Goldsworthy، نويسنده , , M.P. and Hنuser، نويسنده , , T. and Kasotakis، نويسنده , , G. and Kitagawa، نويسنده , , Y. and Martinez-Val، نويسنده , , J.-M. and Mima، نويسنده , , K. and Murakami، نويسنده , , M. and Nishihara، نويسنده , , K. and Piera، نويسنده , , M. and Ray، نويسنده , , P.S. and Scheid، نويسنده , , W. and Sarris، نويسنده , , E. and Stening، نويسنده , , R.J. and Takabe، نويسنده , , H. and Velarde، نويسنده , , G. and Yamanaka، نويسنده , , M. D. Yamanaka، نويسنده , , T. and Castillo، نويسنده , , R. W. Osman، نويسنده , , F.، نويسنده ,
Abstract :
The fast ignitor scheme for achieving inertial fusion energy precompresses the DT fuel to more than 1000 times the solid state density with nanosecond laser pulses. It then employs a picosecond 10–100-PW laser pulse to deposit with very high efficiency the energy necessary to achieve the ignition temperature of approx. 4 keV. In this way the necessary driver energy for inertial fusion energy reactors is reduced from the megajoule level to the 100-kJ level. In this article, we present results relevant to the development of the fast ignitor scheme that have been achieved in recent years by Australian teams in collaboration with international teams. The topics that are specifically addressed are: (1) forces and relativistic mechanisms of laser interaction with the electrons in the intense picosecond beams; (2) electron and ion emission from the focused beam into the precompressed plasma, including double layer effects and collective stopping power; and (3) the energy of the picosecond beam, which when nearly uniformly deposited into the precompressed DT-fuel can achieve the conditions for high-gain volume ignition. Positive results are derived for the volume ignition scheme from considerations of recent high neutron gain laser fusion experiments.
