Reduction of the fast electrons preheating by changing the spike launch time in shock ignition approachMohammad Jafar Jafari, Amir Hossein Farahbod and Somayeh RezaeiEur. Phys. J. D, 70 1 (2016) 15DOI: https://doi.org/10.1140/epjd/e2015-60477-8