To reduce the fast electrons preheating effect by changing launch time of the spike pulse in shock ignition approach

International Conference on Atomic and Nuclear Physics

November 17-18, 2016 Atlanta, USA

Mohammad Jafar Jafari

Nuclear Science and Technology Research Institute, Iran

Posters & Accepted Abstracts: J Astrophys Aerospace Technol

Abstract :

Target characteristic parameters in shock ignition approach before launching the spike pulse are studied using a 1-D hydrodynamic simulation code. By delaying the spike launch time, the shell areal density, ρR, is increased. The enhanced shell areal density prevents the hot electrons preheating of main fuel which in turn is generated from the intense laser plasma interaction with corona. To consider the effect of the spike launch time on the target performance, the target gain for a wide range of spike powers and launch times are computed. It is noticed that for HiPER reference target, few tenth nanoseconds displacement of spike launch time increases the areal density, ρR, value up to 30-70 percent. Furthermore, by choosing an appropriate spike energy and peak power, the optimum target gain is achieved in which the total driver energy is reduced.

Biography :

Email: jafari_mjafar@yahoo.com