Development of an Aircraft-Borne Instrument for Analysis of the Composition of Semi-Volatile Aerosol Particles and Associated Trace Gas Species

这一磁共振成像项目支持开发和建造一种仪器的部分工作，该仪器将提供关于对流层上部/平流层下部区域大气半挥发性气溶胶颗粒组成和相关气相物质的信息。开发工作将通过加州理工学院、国家大气研究中心（NCAR）、格鲁吉亚理工学院和CDI公司之间的合作完成。该仪器重量轻，可在ER-2研究飞机上自动操作。选择离子化学电离质谱（SICIMS）技术将与新型虚拟撞击器入口相结合，以分离气溶胶中的气相。该计划的核心是设计一个合适的校准系统，可以在大气观测期间使用。此外，作为该计划的一部分，将在加州理工学院进行实验室研究，以开发和校准用于检测过氧硝酸和氨等大气重要物质的新离子技术。

This MRI project supports part of the development and construction of an instrument which will provide information on both the composition of atmospheric semi-volatile aerosols particles and the associated gas phase species in the upper troposphere/lower stratosphere region. The development work will be accomplished through a collaboration between the California Institute of Technology, the National Center for Atmospheric Research (NCAR), Georgia Tech, and CDI Corporation. The instrument will be light-weight and autonomously operated on board of an ER-2 research aircraft. The technique of selected ion chemical ionization mass spectroscopy (SICIMS) will be combined with novel virtual impactor inlets to separate the gas phase from the aerosols. Central to this program is the design of a suitable calibration system that can be used during atmospheric observations. Also as part of this program, laboratory studies will be carried out at Caltech to develop and calibrate new ion techniques for detection of atmospherically important species such as peroxynitric acid and ammonia.