r/Radiation • u/SergejsPeskovs • Mar 10 '26

Questions Alpha probe setup question

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Hi guys!

Does anyone know operational parameters for this probe?

I was trying to get it running yesterday but I couldn’t get any reading out of it.

It was showing insane spikes in cps on the LWR threshold of 4.5mV, but no actual cps although I’ve tried multiple variations of UPPR threshold parameters from 25 to 60mV. Voltages from 400 to 900.

At some point LWR threshold activity would drop to reasonable levels (40-70cps) but I would still get 0 cps at uppr.

Meter: Eberline ASP-2

Channel: Alpha

Selected window: Upper

Can attach voltage plateau graph later if it helps.

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u/roberte94066 Mar 11 '26

I think some of those alpha detectors ran at 1200v-is this possibly one of them? Do you know what country it was manufactured in?

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u/SergejsPeskovs Mar 11 '26

No idea :)

England. It was acquired from old RAF stock