Engineering Research Equipment Grant: Autoscanning Ring Dye Laser System

提出了一种高功率、自动扫描的环形染料激光系统，用于利用波长相关的共振光谱精确测量微小颗粒(1-50微米)的尺寸。测量是对悬浮在电场中的单个粒子进行的。粒子将被照亮。精度预计在1埃量级。除了颗粒大小，还可以确定温度和密度梯度、蒸发和冷凝速率、成核速率和收集效率中对颗粒的作用力。微粒特性的测量对许多研究领域都很重要，如制造业(超导体、半导体、化学品)、天气(雾、雾、臭氧、核冬天)和污染控制(烟雾、酸雨、氡)。

A high power,auto-scanning, ring dye laser system is proposed for accurate sizing of micro-particles (1 to 50 microns) by means of wavelength dependent resonance spectra. Measurements are performed on a single particle levitated in an electrical field. The particle is illuminated. Accuracy on the order of 1 Angstrom is expected. Besides the particle size, one can determine forces on particles in temperature and density gradients, evaporation and condensation rates, nucleation rates, and collection efficiencies. Measurement of micro-particle properties is important to many research area, such as manufacturing (superconductors, semiconductors, chemicals), weather (fog, mist, ozone, nuclear winter) and pollution control (smog, acid rain, radon).