Ultraviolet light-arc current stabilization (Townsend coefficients determination)
- 1 November 1982
- journal article
- Published by IOP Publishing in Journal of Physics E: Scientific Instruments
- Vol. 15 (11) , 1156-1157
- https://doi.org/10.1088/0022-3735/15/11/003
Abstract
A circuit is presented which allows the arc current from which the ultraviolet light is derived to be automatically stabilised. The arc current is stabilised by passing it through a power transistor, the base of which is controlled by an operational amplifier. The arc current sensing resistor (6.6 Omega , 12 W) is connected to the inverting input of the op-amp, whilst the reference voltage, taken from a tapping via a potentiometer from the power supply and stabilised by a zener diode, is connected to the non-inverting input.Keywords
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