The time sweeps of images of optical breakdown plasma flashes under irradiation of aqueous solutions of Fe nanoparticles with Nd: YAG laser radiation (λ = 1,064 nm, τ = 10 ns, ν = 10 kHz, ε = 2 mJ) are studied. It is shown that the sizes of plasma flares, the plasma glow intensity, and the time to reach the maximum intensity are concentrated around certain values. So, for example, the values of 30 μm are most typical for the maximum size of flares. The maximum luminescence is usually reached in 3–4 ns. It is found that at initial stage of optical breakdown process the water-vapor boundary moves at typical speed of 11 km/s and have maximum and minimum values at 15 and 4 km/s respectively. It is assumed in this work that such a distribution may be associated with the initiation of breakdown on nanoparticles located in different places of the laser radiation waist.

研究了在Nd：YAG激光辐射（λ= 1,064 nm，τ= 10 ns，ν= 10 kHz，ε= 2 mJ）的Fe纳米颗粒水溶液辐照下的光学击穿等离子体闪光图像的时间扫描。结果表明，等离子耀斑的大小，等离子辉光强度和达到最大强度的时间集中在某些值附近。因此，例如，对于最大的耀斑，最典型的值为30μm。通常，最大发光时间为3-4 ns。发现在光击穿过程的初始阶段，水汽边界以11 km / s的典型速度运动，最大值和最小值分别为15 km和4 km / s。