Experimental measurement of the mobilities of atomic and dimer Ar, Kr, and Xe ions in their parent gases

Abstract

A new experimental technique for measuring the mobilities of positive ions in their parent gases is presented. The technique was applied to the rare gases, Ar, Kr, and Xe, and, for pressures typically below 10 Torr, two different types of positive ions were observed. The reduced mobilities of these ions in their parent gases were measured as a function of E/N, the ratio of the electric field strength to the gas number density, at a temperature of 300±1 K. The results were compared with others available in the literature and the two ions were identified as being the atomic and the dimer rare gas ions. The results are in good agreement with those from other authors. Space charge and impurities effects are discussed.

Experimental ion mobility measurements in Xe-CF4 mixtures

“…The mobility measurements presented in this study were obtained using the experimental system described in [4]. A UV flash lamp with a frequency of 10 Hz emits photons that impinge on a 250 nm thick CsI film deposited on the top of a Gas Electron Multiplier (GEM) placed inside a gas vessel.…”

“…Experimental ion mobility measurements for the LCTPC collaboration-Ar-CF 4 A : In this paper we present the results of the ion mobility measurements made in gaseous mixtures of xenon with carbon tetrafluoride (Xe-CF 4 ) for pressures ranging from 6 to 10 Torr (8-10.6 mbar) and for low reduced electric fields in the 10 to 25 Td range (2.4-6.1 kV·cm −1 ·bar −1 ), at room temperature. The time-of-arrival spectra revealed one or two peaks depending on the gas relative abundances, which were attributed to CF + 3 and to Xe + 2 ions.…”

“…The experimental setup used in the present work (described in detail in [4]) allows the measurement of ion mobility in gas mixtures. Initially thought for high pressure, it was converted into a low pressure gas system, since lowering the operation pressure provided a wider scope of application and more detailed information on the fundamental processes involved in the ion transport and also allowed to reduce the inherent operation cost.…”

Experimental ion mobility measurements in Xe-CO2

“…The mobility measurements presented in this study were obtained using the experimental system described in [10]. A UV flash lamp with a frequency of 10 Hz emits photons that impinge on a 250 nm -2 -…”

“…The experimental setup used in the present work (described in detail in [10]) allows the measurement of ion mobility in gas mixtures. Initially thought for high pressure, it was converted into a low pressure gas system.…”