on the investigation of spark formation conditions and energy gain in inertial confinement fusion

in isobaric models for inertial confinement fusion it is assumed that the target configurationat stagnation time (maximum compression) consists of two regions, hot spark and cold fuel, respectively.here the conditions of spark formation and ignition in hydrogen equimolar isotopes in central sparkignition are investigated and permissible values of hs and ts are evaluated numerically. by introducing adimensionless parameter, ψs, the class of targets are considered by the specific value of ψs. finally,limiting fuel energy gain curve (gf*) as a function of ignition energy (eign) allows different implosionvelocities to be calculated. this result is in good agreement with more complex hydrodynamic models.