Questions tagged [geiger-muller-tube]

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What happens in a Geiger-Müller tube when there is no voltage?

What happens in a Geiger-Müller tube when it is not connected to a circuit? Ionizing radiation must still be creating ions inside it, but they cannot move to the anode because there is no potential ...
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0answers
27 views

Purpose of LLD on GM ratemeter

I'm confused as to the purpose of the LLD (lower level discriminator) setting on a ratemeter GM tube. The LLD establish a threshold hold for the voltage signal from the detector to define an pulse. ...
2
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1answer
153 views

Simple, compact 9V DC to 400V DC step up

I'm attempting to create my own Geiger-Muller counter based on an old, soviet STS-5 tube. I want it to be as compact as possible. I don't want to use ready-made modules, like this one, instead I ...
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3answers
237 views

Arduino Geiger Counter

I have found somewhere the following scheme for an arduino based geiger counter. (The arduino main purpose is to count the pulses from the tube) As far as I can understand it, the transistor would ...
0
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1answer
581 views

geiger tube dc power supply

I have one of these HV dc converters and I was wondering if I can use it to supply a small Russian SMB21 Geiger muller tube. What other parts would I need to add not to fry the GM tube? Keep in mind I ...
3
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4answers
1k views

What is the point of Geiger counter calibration?

I understand that the three ways Geiger counters can be calibrated are electronic calibration and energy calibration, which both use a pulse generator, and radiological calibration which uses a check ...
2
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1answer
593 views

9V to 400V DC-DC Converter

I need to build a Geiger counter power supply circuit that will provide a 400V DC output out of one of those 6LR61 9V batteries. I thought about using a 555 timer to produce a square wave, feed it ...
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3answers
144 views

DC boost supply no-load voltage

I am working on a Geiger counter circuit which utilizes a boost supply similar to the one shown below to polarize the Geiger tube. The tube datasheet specifies a maximum voltage of 475 V. However, I'...
7
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2answers
742 views

Testing an old Geiger tube?

I have an old Soviet personal radiation dosimeter that I broke as a kid by dropping it into water. I opened it up a while ago and the electronics in there were quite simple - mainly a ~10cm Geiger ...
5
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1answer
2k views

Can leaving a Geiger–Müller tube energized continuously cause it to wear out?

I recently acquired a Geiger counter to feed my raging paranoia curiosity. However, I am wondering if it could harm the Geiger–Müller tube to leave it energized continuously? I know a couple places (...