Apparatus for detecting low-speed electrons

Details Apparatus for detecting low-speed electrons Apparatus for detecting low-speed electrons

1986-01-15

1988-04-26

Chatmon, Saxfield

Electric lamp and discharge devices: systems

Pulse storing systems of the gaseous discharge-tube type

31511141, 31511121, 315340, 324 713, 324 714, 2504921, H01J 1736

Patent

active

047407301

ABSTRACT:
An apparatus capable of detecting the low-speed electrons (photo-electrons, exo-electrons) emitted from an object with increased accuracy, regardless of the condition of operating environment is disclosed. The apparatus consists in the main of a bell-shaped cathode opened to the atmosphere at the bottom thereof, and an anode supported within the cathode. The anode is supplied with a high voltage enough to induce a gaseous discharge upon the entrance of the low-speed electrons into the cathode, and the number of pulses generated by the anode as a result of this gaseous discharge is counted. Also, a sensor is provided to detect the condition of the operating environment and outputs a signal indicative of the condition. This signal is used to adjust the condition for gaseous discharge across the anode and the cathode to thereby maintain a constant counting rate.

REFERENCES:
patent: 2792526 (1957-05-01), Warman
patent: 3088074 (1963-04-01), Ross
patent: 3526828 (1967-08-01), Whitby
patent: 4153844 (1979-05-01), Kirschner

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