研究了用少数激光束对低密度结构吸收体的靶有效、对称压缩的可能性。提出了考虑纳秒级高功率激光脉冲吸收特点的多孔介质状态方程。表明,这种靶的开放型方案可使用普通高斯光束,不要求吸收体表面特殊成型。确定了只用两激光束(或两组光束)有效压缩这种靶所必须的条件。计算表明,激光脉冲能量2.1MJ时,该靶的增益系数达到7。 The possibility of efficient and symmetrical compression of a target with a low density structure using a few laser beams was studied. The equation of state of porous media considering the characteristics of nanosecond laser pulse absorption is proposed. This open target approach shows that ordinary Gaussian beams can be used without special shaping of the absorber surface. The conditions necessary for efficient compression of such a target with only two laser beams (or two sets of beams) were determined. The calculation shows that the gain coefficient of this target reaches 7 when the laser pulse energy is 2.1MJ.