超高速碰撞微波辐射强度测量

 针对超高速碰撞物理现象研究需要，为了确认超高速碰撞过程中的电磁辐射信号能作为超高速碰撞产生的可探测物理量之一，利用研制的8 mm微波辐射计在中国空气动力研究与发展中心FD-18A超高速碰撞靶开展了超高速碰撞过程中的微波辐射强度测量初步试验研究。对试验测量方案进行了介绍，获得了弹丸超高速撞击半无限铝靶和半无限铜靶时产生的微波辐射强度测量试验结果。弹丸为直径5 mm 的LY12铝球，撞击速度1.98~4.3 km/s，撞击角为0°，结果表明：在本试验条件下，超高速碰撞产生了明显的微波辐射强度，材料的不同导致碰撞过程中产生的微波辐射强度差别较大。

Microwave Radiation Measurement on Hypervelocity Impacts

The microwave radiation intensity measurement on hypervelocity impacts were conducted with the 8 mm microwave radiometer at the hypervelocity impact facility at HAI, CARDC. The paper presented the test results of the microwave radiation resulted from hypervelocity impacts on the semi-infinite aluminum and semi-infinite copper target materials. The projectiles were LY12 aluminum spheres with impact velocity ranged from 1.98 km/s to 4.3 km/s. The projectiles were 5 mm in diameter. The impact angle is 0°. The microwave radiation intensity were measured in the approach of fixing projectiles, varying projectile velocity and target materials. The results showed that the hypervelocity impact induced microwave radiation could be detected obviously under test conditions. The microwave radiation intensity of the semi-infinite copper target materials duo to hypervelocity impacts was higher than that of the semi-infinite aluminum target materials under the same conditions.