FEU84-5 ФЭУ-84-5 PMT photomultiplier tube for gamma spectrometry

I’ve bought a couple of FEU84-5 PMT’s from an eBay seller. I’ve bought because of an occasional low price and because I heard that this tube is very good for gamma spectrometry.

GENERAL SPECIFICATIONS
Photocathode -  antimony-potassium-sodium-cesium
Optical input - front
The diameter of the working area of the cathode - 25mm 
The number of amplification stages - 12
Wavelengths of maximum sensitivity  -   420-550 nm green light
Dark current  -   < 50 nA
Sensitivity of the photocathode   -   < 80 mkA/lm
Anode sensitivity, A/lm - <80
Life time   -   more than 1000 hours
Maximum Ratings :
Max Voltage -  1900 V
Max anode current - 5 micro A
FEU84-5 and it’s datasheet

It comes into a cardboard envelope with some sponge that starts to disintegrate after 30 years of storage. Nothing to complain… some paper and alcool and I’ve cleaned the tube.

FEU’s box
FEU’s sponge :3

 

 

 

 

 

 

 

This version of the tube doesn’t have a socket, it have just some teflon insulated wires. This is not bad…there is no need to buy a proper ceramic socket.

End wires
FEU front window

Click to download

 

Author: l.i.papadopol