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ecocurious2 / MultiGeiger

Geigerzähler mit ESP32 und empfindlichem Si22g-Zählrohr (Gamma)
https://multigeiger.readthedocs.io/
GNU General Public License v3.0
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maximum geiger mueller pulse rate? #280

Open ThomasWaldmann opened 4 years ago

ThomasWaldmann commented 4 years ago

what's the maximum pulse amount per second we could expect to see from a Si22G measuring very high radiation?

how much is it for other tubes?

just interested in how often the respective ISR would get triggered.

ThomasWaldmann commented 4 years ago

https://en.wikipedia.org/wiki/Geiger%E2%80%93M%C3%BCller_tube says it usually is about 1000 pulses per second and above that the count rate gets unreliable.

ThomasWaldmann commented 4 years ago

With high pulse rates, one could compensate for the tube dead time by adding the statistical amount of pulses that happen in dead times to the actually measured pulses.

Doesn't make a real difference for low radiation though.

ThomasWaldmann commented 4 years ago

Just found some info on the internet that e.g. a CT X-Ray machine can be used for high-radiation testing.

A SBM-20 seems to do 300.000 CPM == 5000 CPS there (which sounds like that could be at or close to the limit of such a tube?).

A test under such conditions would show whether counting and HV generation works under high load.