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 NXP Semiconductors


  • Geiger Counter

  • Created: Mar 23, 2014

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Description

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Summary

A Geiger counter, also called a Geiger-Muller (GM) counter, is a type of particle detector that measures ionizing radiation. It detects the emission of nuclear radiation: alpha particles, beta particles, and gamma rays by the ionization produced in a low-pressure gas in a Geiger-Muller (GM) tube, which gives its name to the instrument.

A High Voltage generator (U1, U2, Q1, T1, and associated components) powers a GM tube. A pulse from the GM tube is interfaced through Q2 and U1 to pulse-generator U3, which drives a speaker.

3 Comments


Rick.Curl

I think you've got the wrong transformer here.....

Posted: Aug 26, 2014


Oppie

On the GM counters I worked on in the past, the plateau voltage was 800-900V. For safety reasons, the metal outer case (cathode -)was at ground potential. The signal was capacitively coupled with 1000 pF 3KV rated from the Anode.

Posted: Aug 26, 2014


PB Fortich

Yah, I observe this one before but I think its okay now. The transformer has been replaced already

Posted: Dec 22, 2014


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