The use of cooled photomultiplier tubes with oxide cathodes in the photon counting regime
Abstract
The paper describes a photomultiplier tube for the measurement of rapid variations of upper-atmospheric hydroxyl emission in the near infrared. The photomultiplier contains an end-face semi-transparent oxide-cesium photocathode and must be cooled to about -70 C to reduce dark background levels. The cooling system is a refrigerator filled with a mixture of dry ice and alcohol. Signal recording is carried out in the photon counting mode, and the instrument studied here achieved a dark background level of 1-10 pulses/s.
- Publication:
-
In: Aurorae and nightglow. Number 24. (A76-44051 22-46) Moscow
- Pub Date:
- June 1976
- Bibcode:
- 1976MoISR.......75P
- Keywords:
-
- Emission Spectra;
- Hydroxyl Emission;
- Near Infrared Radiation;
- Photomultiplier Tubes;
- Radiation Counters;
- Upper Atmosphere;
- Background Noise;
- Cesium Oxides;
- Cooling Systems;
- Mesopause;
- Photons;
- Signal To Noise Ratios;
- Instrumentation and Photography