Abstract: Power supply, which is used to energize the ion pump, has to be able to meet a fairly wide range of load variation. While operating at a high pressure, since the characteristics of the pump is such, that a glow discharge appears between anode and cathode, the pump draws rather heavy current from the supply. In this condition, the voltage across the pump is very low or near to zero. At that time the current is high which is called short circuit current. The actual value of this current is dependent on the intensity of the electric discharge and is also governed by the geometry and the capacity of the pump. As the pumping action get under way, the discharge intensity comes down, thereby reducing the current that has to be handled by the power supply. With the change in pressure there is the proportional change in the current. And from this current the pressure generated can be inferred. As the current decreases the voltage across the pump increases and when the pressure gets to order of 10-8 torr, the voltage ranges to its maximum value (negative).
Keywords: SIP (Sputter Ion Pump).
Title: SIP CONTROLLER
Author: PRATEEK GUPTA, SHWETA CHOUBEY
International Journal of Electrical and Electronics Research
ISSN 2348-6988 (online)
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