The effect of secondary processes in a photomultiplier tube on the characteristics of the photodetector
Abstract
Expressions are derived for the mean value of the anodic current and the signal-to-noise ratio at the output of a photomultiplier tube, taking into account the formation of afterpulses. These expressions are used for the numerical calculation of the threshold sensitivity of a photomultiplier tube and the characteristics of the receiving system of a lidar. It is shown that the main factor determining this sensitivity is exoelectron emission from the dynodes. For spray-deposited emitters, having a high exoemission yield, the exoemission from the dynodes leads to a 5-10-fold deterioration in the threshold of the photomultiplier tube.
- Publication:
-
Radiotekhnika i Elektronika
- Pub Date:
- October 1983
- Bibcode:
- 1983RaEl...28.2042V
- Keywords:
-
- Optical Radar;
- Photometers;
- Photomultiplier Tubes;
- Spectral Sensitivity;
- Anodes;
- Signal To Noise Ratios;
- Statistical Analysis;
- Thresholds;
- Electronics and Electrical Engineering