Fig. 8

Plots depicting the (top) ion beam current created from the oxygen molecular gas with an acceleration voltage of 10.7 keV as a function of the E x B filter electromagnetic coil current and (bottom) the mass per charge of the incident ion as a linear function of the electromagnetic coil current in the same formats as Fig. 7. The linear function in the bottom panel was constrained with the \({\text{O}}^{+}\) and \({\text{O}}_{2}^{+}\) ion beam currents