Yesterday I was at a hamfest, and luckily find 2 PMTs... I had a surplus (had some uv kodak filter on it) "931A" for 10$ and a new "9781B" for 30$ (circa). They are of the "on side, circular cage" type 9 stages.
Specs:
BURLE 931A bialkali Cs-Sb maximum response at 380nm, Anode pulse rise time 1.8 ns (1000v), Transit time 18 ns(1000v), Anode responsivity radiant 2.1 x10^5, current amplification (gain) 5.5 x10^6
EMI (now Electron Tubes) 9781B bialkali Cs-Sb maximum response at 300nm, anode pulse rise time 2ns, pulse width 4ns, transit time 20 ns, gain 0.7 x10^6
Are these tubes suitable for neuts counting ? Ciao e grazie Daniele
Created on Wednesday, May 02, 2001 3:33 AM EDT by Daniele DB Bortoluzzi