Waggoner A P, Radke L F, Buonadonna V, Dowling D R
Appl Opt. 1992 Sep 20;31(27):5871-7. doi: 10.1364/AO.31.005871.
We report experiments that confirm our prediction that clouds consisting of ice crystals with properties similar to those of cirrus clouds can be cleared with relatively low pulsed CO(2) laser energy density and that the cleared channel is resistant to obscuration by recondensation of the evaporated water. For the experiments reported here, we use a unique cloud-generating apparatus consisting of a low-speed wind tunnel with water spray injectors to generate water droplets or, with ice nucleus seeding at low temperatures, ice crystals. The air temperature can be controlled over the range of ambient to -40 degrees C. A significant clearing of ice crystal clouds was observed with pulsed CO(2) laser fluence in the range 0.2 to 1.5 J/cm(2) and, as expected, recondensation was found to depend on ice particle mass concentration. At ice particle concentrations similar to those found in cirrus clouds, recondensation did not occur.
我们报告了一些实验，这些实验证实了我们的预测，即由具有类似于卷云特性的冰晶组成的云可以用相对较低的脉冲二氧化碳激光能量密度清除，并且清除后的通道能抵抗因蒸发水的再凝结而产生的遮蔽。对于此处报道的实验，我们使用了一种独特的云生成装置，该装置由一个带有喷水注射器的低速风洞组成，用于产生水滴，或者在低温下进行冰核播种以产生冰晶。空气温度可在环境温度至零下40摄氏度的范围内控制。在脉冲二氧化碳激光能量密度为0.2至1.5焦耳/平方厘米的范围内，观察到冰晶云有显著清除，并且正如预期的那样，发现再凝结取决于冰粒子质量浓度。在与卷云中发现的冰粒子浓度相似的情况下，未发生再凝结。
