Handmade Air Geiger Counter

Measurement of space radiant rays

Let's measure the difference in the dose of radiation by altitude.
You had better do on the plane. I measured it on the alpine road shown altitude.
It is the Fuji Subaru line of Yamanashi Prefecture.
Measurement result
whereAltitude[m]Average[cpm]
The second stage1596455
Osawa parking20201027
The fifth stage23053270
Amazing!
The atmospheric pressure inside the air GM tube falls as altitude goes up. And then probably, detection efficiency increased.
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