Abstract
IMS (Ion Mobility Spectrometry) is a well-known gas analytical technique for ionized gas molecular. In the past decades, IMS has been widely used for detecting hazardous compounds, explosives and chemical warfare agent. Recently, IMS also established a strong foot hold in medical application like detection of drug abuse, clinical examination and personal health care. In this research, we established an aspiration condenser as an ion mobility spectrometry. Ionized gas molecular are separated by electric field intersect with carrier gas flow. Gas recognition in aspiration condenser usually done by analyzing multi-channel data. Heikki Pakkanen proposed a multi-channel aspiration condenser for CWA(chemical warfare agent) detection in 1991 and become a popular solution for military purpose. Although aspiration condenser is good at chemical compounds fast detection, the poor analyzing and gas recognition ability limit it application. The aspiration condenser designed in this research is based on the model proposed by Emilio Sacristan and Andro A. Solis. Swept-field mechanism and Discrete Tammet Transform increased the gas recognition ability in aspiration condenser. We introduce the effect of Brownian motion in aspiration condenser and modified the analyze process and transform equation. The new transform equation had been examed with experiment and the result shows Brownian motion has unnegligible effect in aspiration condenser.