INERTIAL CONFINEMENT FUSION - IGNITION OF ISOBARICALLY COMPRESSED D-T TARGETS
Ignition of initially isobaric D-T plasmas, triggered by a hot spot, surrounded by denser, cold fuel, is studied both analytically and numerically. If the conditions for self-heating of the hot spot are met, then a burn wave propagates, at first through deflagration driven by alpha- particles, and eventually through detonation. After an initial transient phase and the self-heating stage, burn is propagated mainly by alpha particle transport, while the burning region is cooled at comparable rates by heat conduction and hydrodynamic expansion. The whole process is described by means of three dimensionless quantities (related to alpha particle production, thermal conductivity and alpha particle transport, respectively) and, as suggested by 1D numerical results, an ignition criterion is given in terms of two of them. Examples of applications show its usefulness in target design. A condition for burn propagation is also derived.
Bibliographic Reference: IL NUOVO CIMENTO, VOL. 80B (1984), NO. 1, PP. 71-103
Record Number: 1989123019500 / Last updated on: 1987-01-01
Available languages: en