Abstract
The operation characteristics of some axial-emission gauges similar to the construction of Chen and Suen were studied in the high vacuum range. Electron space charge effects arose in the case of high cathode potentials, yielding a strong dependence of the sensitivity on the emission current. To avoid this dependence it is necessary to operate the gauge with low cathode potentials or to increase the voltage between cathode and grid. Both the cathode potential and the anode voltage influence the sensitivity, which passes a maximum with increasing cathode voltage. The position of this maximum is shifted by the value of the anode voltage. Both effects are discussed.
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