The effect of long-wavelength irradiation nonuniformities on the performance of single-shell, reactor targets is investigated by means of 2-D numerical simulations. The stages of target collapse, hot-spot formation, ignition, and burn are illustrated. Evidence is shown for the occurrence of the Rayleigh-Taylor instability during target stagnation. It is then shown that the sensitivity of a given family of targets to the nonuniformities of the driving pressure critically depended on the 1-D ignition margin and on the spark convergence ratio of the target. The tolerable levels of nonuniformity as a function of the perturbation mode number are determined, for selected targets, by means of a parametric numerical study.
IMPLOSION SYMMETRY AND BURN EFFICIENCY IN ICF / Atzeni, Stefano. - In: LASER AND PARTICLE BEAMS. - ISSN 0263-0346. - STAMPA. - 9:02(1991), pp. 233-245. (Intervento presentato al convegno 20TH EUROPEAN CONF ON LASER INTERACTION WITH MATTER ( ECLIM 90 ) : PULSE POWER HIGH ENERGY DENSITIES tenutosi a SCHLIERSEE, FED REP GER nel JAN 22-26, 1990) [10.1017/s026303460000330x].
IMPLOSION SYMMETRY AND BURN EFFICIENCY IN ICF
ATZENI, Stefano
1991
Abstract
The effect of long-wavelength irradiation nonuniformities on the performance of single-shell, reactor targets is investigated by means of 2-D numerical simulations. The stages of target collapse, hot-spot formation, ignition, and burn are illustrated. Evidence is shown for the occurrence of the Rayleigh-Taylor instability during target stagnation. It is then shown that the sensitivity of a given family of targets to the nonuniformities of the driving pressure critically depended on the 1-D ignition margin and on the spark convergence ratio of the target. The tolerable levels of nonuniformity as a function of the perturbation mode number are determined, for selected targets, by means of a parametric numerical study.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.