New Cloud Droplet Sampler: Optimization and Cloud Chemistry Experiments

逆流式虚拟冲击器（CVI）是一种惯性冲击器， 分离装置，用于将云滴从其 气体环境，随后的化学和物理 分析. 在目前的发展阶段，CVI现在 被私家侦探利用在空中和地面的小组- 基于云的采样。这项新拨款为 取样探头的进一步发展及其应用 在云化学研究中。 有四个目标。 (1)到 测试设计修改，以扩展可测量范围 液滴尺寸和提高“切割尺寸”的清晰度 分馏 (2)为了更好地定义操作限制， 关于液滴变形的问题， 分解，蒸发和聚结，使用两种实验方法， 和理论方法。 (3)将CVI应用于 云滴中溶解的不稳定物种，特别是 二氧化硫 (4)在云中进行实地观测 探索化学和物理问题， 通过测量液滴特性作为 颗粒大小

The Counterflow Virtual Impactor (CVI) is an inertial separation device for removing cloud droplets from their gaseous environment for subsequent chemical and physical analysis. In its present stage of development, the CVI is now being used by the P.I.'s group in both airborne and ground- based sampling of clouds. This new grant provides for the further development of the sampling probe and its application in cloud chemistry studies. There are four objectives. (1) to test design modifications to extend the range of measurable droplet sizes and to improve the sharpness of "cut-size" fractionation. (2) To better define the operating limitations of the device with respect to problems of droplet distortion, break-up, evaporation, and coalescence, using both experimental and theoretical approaches. (3) To apply the CVI in studies of dissolved labile species in cloud droplets, especially of sulfur dioxide. (4) To conduct field observations in clouds to explore chemical and physical questions that can be approached by measuring droplet properties as a function of particle size.