Pulsed radiation detector system

Details Pulsed radiation detector system Pulsed radiation detector system

1976-01-20

1977-09-20

Willis, Davis L.

Radiant energy

Luminophor irradiation

With ultraviolet source

G01N 2138

Patent

active

040499707

ABSTRACT:
Disclosed is a fluorescence spectrometer having an intermittently activated sample irradiating source, such as a UV lamp, the periods of activation being short (e.g., 100 microseconds) in comparison to the intervening inactive periods (e.g., 20 milliseconds). Fluorescence radiation emitted by the sample is detected by a photomultiplier, the output signal of which is supplied to an integrating amplifier for utilization. A field effect transistor (FET) in the output circuit of the photomultiplier has its gate coupled to a control unit which determines the activation periods of the lamp and, in timed relation thereto, cuts off the FET to interrupt the output circuit during periods that the lamp is inactive. A dual channel fluorescence spectrometer is also described.

REFERENCES:
patent: 3947683 (1976-03-01), Schultz et al.
patent: 3975098 (1976-08-01), West

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