Search found 9 matches

by pawel1010
22 Apr 2022, 11:14
Forum: Detectors
Topic: gamma spectrometer signal
Replies: 11
Views: 2242

Re: gamma spectrometer signal

Steven, I'm not shielding background. The CdWO4 scintillators naturally have low background counts. Yesterday I increased about ten times amplification and I've noticed coming pulses more frequently on oscilloscope. Here is the recored audio for radium 226 after changes: https://drive.google.com/fil...
by pawel1010
11 Apr 2022, 06:18
Forum: Detectors
Topic: gamma spectrometer signal
Replies: 11
Views: 2242

Re: gamma spectrometer signal

Steven, After the closer inspection, I found that was a light leakage. I sealed the box and increased 5 times amplification of the signal due to your suggestions. The current recording after the modification is attached here: https://drive.google.com/file/d/126HpkTgIFUqmIXYojK58w7yx5qfDK87k/view?usp...
by pawel1010
08 Mar 2022, 00:20
Forum: Detectors
Topic: gamma spectrometer signal
Replies: 11
Views: 2242

Re: gamma spectrometer signal

To find the solution of problem I recorded output from my spectrometer with program InTune: https://drive.google.com/file/d/1BG3Pcbx24SuFLBut33muzjsAOmI-gmx2/view?usp=sharing Please look at this pulses, I would be very grateful for help with filtering radium 226 gamma spectrum from this .wav file if...
by pawel1010
01 Mar 2022, 23:18
Forum: Detectors
Topic: gamma spectrometer signal
Replies: 11
Views: 2242

Re: gamma spectrometer signal

Steven,

I reduced system sound volume to 50%. Since then, the pulses have shown. With higher volume then 50%, the tops of the highest pulses are horizontally cut. The check source is radium-226.

The spectrum still doesn't look correctly:
Image
by pawel1010
21 Feb 2022, 07:44
Forum: Detectors
Topic: gamma spectrometer signal
Replies: 11
Views: 2242

Re: gamma spectrometer signal

Steven, I've reshaped pulses to fit them in range 0-1.4 volts. I also added zero pole cancellation. Now they looks like this: https://www.gammaspectacular.com/phpBB3/download/file.php?mode=view&id=3268 https://www.gammaspectacular.com/phpBB3/download/file.php?mode=view&id=3269 I didn't know ...
by pawel1010
14 Feb 2022, 07:49
Forum: Software
Topic: Gamma spectrometer Theremino or PRA
Replies: 3
Views: 286

Re: Gamma spectrometer Theremino or PRA

Dear GigaBecquerel,

I created the new topic, because I consider electronics problem with my detector.

Here is the link to the topic, where is video of pulses with the mVpp statistics on the baseline: viewtopic.php?f=14&t=992
by pawel1010
13 Feb 2022, 11:38
Forum: Detectors
Topic: gamma spectrometer signal
Replies: 11
Views: 2242

gamma spectrometer signal

I've built gamma spectrometer with CdWO4 scintillator crystal connected to diode with unknown parameters. The crystal dimensions are 30x7x5 mm. The output signal are positive pulses with heights in range 0-2 volts amplitude and 150 µs width at the bottom. Here is example output pulse and software di...
by pawel1010
13 Feb 2022, 10:32
Forum: Introductions >> Start Here !
Topic: Hello from Poland
Replies: 0
Views: 219

Hello from Poland

Hello everyone.

My name is Paweł, I came from Poland. I'm a physics student, generally interested in optics and electronics. I got here, because I was trying to build gamma spectrometer and I have little problems with it.
by pawel1010
31 Jan 2022, 13:46
Forum: Software
Topic: Gamma spectrometer Theremino or PRA
Replies: 3
Views: 286

Gamma spectrometer Theremino or PRA

I've built gamma spectrometer with CdWO4 scintillator crystal connected to diode with unknown parameters. The crystal dimensions are 30x7x5 mm. The output signal are positive pulses with heights in range 0-2 volts amplitude and 150 µs width at the bottom. Here is example output pulse from my spectro...