摘要
对辐射驱动内爆过程中靶球的外壳与热核燃料的“混合”问题，在一维数值模拟中的处理方法作了详细的说明，给出了一维数值模拟的主要结果，对“混合”
In radiation driven implosion experiments conducted on Shenguang-I, neutron yields measured are less than the value expected by 1-D numerical simulation, in which one of the reasons is the “mixing”that is investigated in the paper. In the implosion process driven by radiation, pusher material is mixed with fuel for which hydrodynamic instability is responsible. All the experiments and numerical simulation indicate that the mixing distance is similar to the free falling body with damping factor and there is explicit form. We assume atomic mixing, and define the mixing ratio. How do simplify and treat physical quantities of the mixing in 1-D numerical simulation, that have explained in detail. In the case of certain driven energy source , when glass shell thickness is ΔR SiO 2 ≡4μm, the variation of the mixing quantity with fuel mass is studied; when fuel density is ρ DT ≡0 003pgμm -3 , variation of the mixing quantity with shell thickness ΔR SiO 2 is also simulated. Finally, the main results in 1-D numerical simulation have been given and the netron yield is reduced dramatically by the mixing, which have been analyzed in the paper.
出处
《强激光与粒子束》
EI
CAS
CSCD
1996年第2期221-226,共6页
High Power Laser and Particle Beams
关键词
辐射驱动
中子产额
内爆靶球
Fuel systems
Laser produced plasmas
Neutrons
Radiation effects
Stability
