Transient Analysis by Channel Flow Triple Electrode

Abstract

The theory of transient analysis by a channel flow triple electrode was derived. In the present electrode system, two serial collecting electrodes were located at the down-stream of the working electrode. Three dynamic collection efficiencies, which were complex numbers depending on the frequency, were measured for the compensations among the transient currents on the three electrodes, The amplitude of the dynamic collection efficiency was close to steady state collection efficiency in the low frequency range, and decreased with increasing frequency in the high frequency range, indicating that the collection system works as a low pass filter. The transient current of the working electrode, which emitted the ions, could be determined from the transient currents of the two collecting electrode by the calibration using dynamic collection efficiencies.