金属蒸汽中的激光维持爆震波

 应用我们发展的一个激光与金属蒸汽相互作用的简化物理模型对激光维持爆震波的点火激励、传播规律作了数值研究并取得了较好的结果。计算得到的LSD波阈值与激光脉宽的关系表现出典型的幂规律I_th∝τ^-1/2。此外，还得到了一些关于LSD波屏蔽效应的有益结果。在LSD波充分发展的阶段，LSD波阵面的光学厚度可达5~10的量级，这表明LSD波具有很强的屏蔽作用。

LASER-SUPPORTED DETONATION WAVES IN METAL TARGET VAPOUR

A physical model for laser metal-vapor interactions has been developed and used to study numerically the laser supported detonation waves (LSDWs) in vapor in front of metal targets, and some good results about LSDWs, such as ignition mechanism, threshold, propagation law and so on, have been obtained numerically with the model. A power law between LSDWs threshold and laser pulse duration, I_th∝τ^-1/2, has been obtained. Some useful results about the LSDWs shield effects have also been obtained. In the developing phase of LSDWs, the optical thickness of the front of LSDWs may reach 5~10 in order of magnitude. It is shown that the LSDWs are able to play a very strong shield role.