Circuit for processing a signal received by an electron multipli

Details Circuit for processing a signal received by an electron multipli Circuit for processing a signal received by an electron multipli

1990-06-11

1992-05-26

Williams, Hezron E.

Measuring and testing

With fluid pressure

Leakage

356226, 330 42, 313103R, G01M 320, H01J 4330

Patent

active

051156679

ABSTRACT:
The present invention relates to a circuit for processing a signal received by an electron multiplier. The circuit comprises an electron multiplier followed by an electron collector, a power supply for the electron multiplier, a gain-compressing amplifier for processing the signal delivered by the electron collector, and a feedback path for continuously modulating the gain of the electron multiplier by means of a control circuit which acts on the HT power supply of the electron multiplier. This circuit is particularly suitable for use in mass spectrometry and in helium leak detection.

REFERENCES:
patent: 4823004 (1989-04-01), Kaiser et al.
patent: 4996422 (1991-02-01), Mitsui et al.

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