Abstract

ABSTRACTA cold cathode Penning ion source was designed and operated at the optimumconditions. Its characteristics were determined using nitrogen and argon gases atpressure equal to 9×10-4 mmHg. Efficiency of this ion source was determinedusing nitrogen and argon gases. Also, ion source aspect ratio was determinedusing argon gas. The effect of negative voltage applied on Faraday cup usingargon gas was studied. Finally, a simple retarding electrostatic field energyanalyzer has been designed to determine the ion energy distribution.

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