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Faq 12

Dear Photomultiplier Doctor,

I have used EMI 9524S photomultipliers, which has given excellent performance of low and stable dark counts, even after several TLD measurements where the temperature of the photomultiplier housing is bound to increase due to repeated heating. Which photomultipliers do you currently recommend?

Dr. Ganesan Ramanathan
National Physical Laboratory

Dear Dr. Ramanathan,

The potassium bialkali photocathode has replaced the S11 type used in the 9524 photomultipliers you have used. This has even lower more stable dark counts (as low as 10 counts per second) and is largely insensitive to temperature change up to about 40°C.

Regards,

Photomultiplier Doctor.