Drift Velocities ofO2+, CO2+, and CO4+Ions in CO2Gas

The drift velocities of $\mathrm{O}_2^{}{}_{}{}^{+}$, C$\mathrm{O}_2^{}{}_{}{}^{+}$, and C$\mathrm{O}_4^{}{}_{}{}^{+}$ ions in their parent carbon dioxide gas have been measured using the "four-gauze" electrical shutter method of Tyndall et al. with a glow-discharge ion source. Measurements were made at 29-32°C gas temperature over a range of $\frac{E}{p_0}$ from 20 to 250 V/cm torr and in a pressure range of from 0.5 to 1.3 torr. The ions have been identified mass spectrometrically during the process of measurement of the drift velocity. The predominent ions were $\mathrm{O}_2^{}{}_{}{}^{+}$ and C$\mathrm{O}_2^{}{}_{}{}^{+}$. In addition, ${\mathrm{C}}^{+}$, ${\mathrm{O}}^{+}$, C${\mathrm{O}}^{+}$, ${\mathrm{C}}_2$ ${\mathrm{O}}^{+}$, ${\mathrm{C}}_2$ $\mathrm{O}_2^{}{}_{}{}^{+}$, C$\mathrm{O}_3^{}{}_{}{}^{+}$, ${\mathrm{C}}_3$ $\mathrm{O}_2^{}{}_{}{}^{+}$, C$\mathrm{O}_4^{}{}_{}{}^{+}$, and ${\mathrm{C}}_2$ $\mathrm{O}_4^{}{}_{}{}^{+}$ molecular ions have been observed. The mobility, extrapolated to zero field and atmospheric pressure, is about 1.32 ${\mathrm{cm}}^2$/V sec for $\mathrm{O}_2^{}{}_{}{}^{+}$ and C$\mathrm{O}_4^{}{}_{}{}^{+}$ ions and 1.13 ${\mathrm{cm}}^2$/V sec for C$\mathrm{O}_2^{}{}_{}{}^{+}$ ions.