Electrodynamic trapping and manipulation of ice crystals
Electrodynamic trapping and manipulation of ice crystals
复制标题
冰晶的电动捕获和操纵
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
M. Baker
中科院分区：
文献类型：
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作者：
B. Swanson;N. J. Bacon;E. Davis;M. Baker
我们开发了一种双环双盘电动天平，通过内部热扩散室提供湿度控制，以研究涉及10 - 200 μm冰粒的几个重要大气过程。通过非轴对称电场的三维弛豫方法计算，以及通过使用已知尺寸和质量的聚苯乙烯胶乳微球对颗粒稳定性开始的实验测量，确定量化颗粒尺寸和质量所需的平衡常数。我们在一系列与大气相关的温度和湿度条件下悬浮了各种形状和大小的霜颗粒。在生长和升华过程中测得的质量变化与基于蒸汽和热扩散到等效球体的预测一致。电动天平被证明是一个有用的工具，用于探索单个粒子的生长和升华速率，并用于测量它们的光散射特性。
We have developed a double‐ring double‐disk electrodynamic balance with humidity control provided by an internal thermal diffusion chamber to study several atmospherically important processes involving 10‐200 μm ice particles. the balance constants needed to quantify the particle size and mass were determined by a three‐dimensional relaxation‐method calculation of the non‐axisymmetric electric fields, and by experimental measurement of the onset of particle stability using polystyrene latex microspheres of known size and mass. We have levitated frost particles of various shapes and sizes under a range of atmospherically relevant temperature and humidity conditions. the measured mass changes during growth and sublimation are consistent with predictions based on vapour and thermal diffusion to equivalent spheres. the electrodynamic balance is shown to be a useful tool for exploring single particle growth and sublimation rates, and for measuring their light‐scattering characteristics.