[19a-P04-1~9] 8 Plasma Electronics(Poster)

▲ [19a-P04-4] Simulation of Ion Trajectories in an Ion Mobility Spectrometer for Atmospheric Pressure Plasma Diagnostics

〇(D)Keith Nealson Penado¹, Motoi Wada¹ (1.Doshisha Univ.)

Keywords:plasma simulation, atmospheric pressure plasma, ion mobility spectrometry

Ion Mobility Spectrometry (IMS) has been used in the analysis of explosives, and dangerous narcotics. The process involves the measurement of the electrical current signature of ions in a buffer gas under an applied weak electric field. Depending upon the mobilities (K₀) of ion species present in the swarm, the time evolution of the signal shows characteristics of the ion time-of-flight. Recently, the application of this method has been expanded to analyses of large biomolecules. The transport of ions in an IMS drift tube is determined from the collisions of ions with the background gas molecules. A simulation model of the ion trajectory inside the spectrometer is being developed to estimate the mass resolution of the system.