Extinction Spectroscopy for Particle Sizing: Fundamental Principles, Key Technologies, and Applications

讲座名称：Extinction Spectroscopy for Particle Sizing: Fundamental Principles, Key Technologies, and Applications

讲座人：任宽芳 教授

讲座时间：4月11日19:00-20:30

地点：亚博足彩西大楼205教室（教学区）

讲座人介绍：

任宽芳本科毕业于陕西师范大学物理系，后在亚博足彩获无线电物理理学硕士学位。后赴法国鲁昂大学CORIA/UMR 6614研究所担任访问学者，期间获得博士学位并留任研究员。1998年获聘终身职位副教授，2008年晋升为教授，2015年晋升为一级教授。主要研究方向：激光束与规则形状粒子相互作用的理论研究；小颗粒光学测量技术开发及其在流体力学与燃烧学中的应用；光束作用于粒子的辐射压力与扭矩的理论预测；矢量复射线模型（VCRM）的开发——用于描述任意形状目标的电磁/光散射问题。在科学期刊发表论文110余篇，曾主持多项法国国家级项目。

讲座内容：

Extinction spectroscopy for particle sizing is based on the analysis of wavelength-dependent light attenuation to determine particle size distributions. It is, in principle, a simple technique. Prior to the advent of CCD-based spectroscopes, this technique had already established utility across multiple fields. Thanks to the development of the CCD-based spectroscope and computer science, it has experienced significant progress, and become widely used in many fields, such as measurement of web steam in power plants, automotive exhaust analysis, atmospheric dust monitoring, etc. However, the technique’s reliability depends on two critical factors: (1) optimized optical configuration (e.g., wavelength selection, size and position of the detector …) and (2) robust inversion algorithms to solve the inherently ill-posed PSD retrieval problem. This talk will share the experience in the development of (i) an advanced inversion algorithm employing adaptive regularization and multi-wavelength calibration to handle complex, polydisperse systems; (ii) a user-friendly software package featuring real-time processing and automated quality control; and (iii) field-tested measurement systems validated for industrial environments, such as turbine steam quality control and diesel particulate emissions testing.

主办单位：物理学院