For the DT fusion m ¼ 2.5mp where mp is the proton mass. T in Equation (4) is the temperature and kB is Boltzmann’s constant.We chose the ideal gas EOS because the high temperature involved in our case of fast ignition and the relation between the pressure and the temperature in Equation (4) is a good relativistic EOS for particles with a zero chemical potential (Eliezer et al., 2002).