The effect of cooling
At room temperature, the contribution from thermally generated electrons from the photocathode dominates. This figure shows the effect of temperature on dark counts and the advantage of cooling in low level detection is obvious. For all cathodes shown, there is little advantage in cooling below -25 °C.
Features include:
- capable of cooling to 50 °C below the cooling medium temperature
- included positive or negative HV voltage divider
- space for additional circuitry
- evacuated double walled Pyrex window for condensation free use
- over temperature cut out with visual and audible warning
- can be set to within 0.1 °C
The standard Pyrex window has a short wavelength cut-off at 280 nm. An optional quartz window is available for use in the UV; this extends detection down to 170 nm.
Air Cooled Housings
FACT 50 - Up to Ø52 mm photomultipliers.
The FACT50 is a forced air cooled housing.
Click view more information to view the drawing.
Water Cooled Housings
LCT 50 - Up to Ø52 mm photomultipliers.
Click view more information to view the drawing.
