An accurate do-it-yourself radiation meter
dcmk1mr2 at gmail.com
Sun Feb 12 14:35:15 CST 2012
There's an app for that: http://www.youtube.com/watch?v=qJcOq5sLxPo
and a FAQ: http://www.hotray-info.de/html/radioa_faq.html
I think there are two aspects - detector size and accuracy. In the FAQ the
developer mentions measuring multiple bursts that might go uncounted with a
GM tube. The high voltage supply on a GM tube needs time to recharge after
ionization and misses other events during this dead time. The LCD would
probably have similar dead times.
On Fri, Feb 10, 2012 at 6:29 PM, Bob Bruninga <bruninga at usna.edu> wrote:
> What I don't get is the 2 orders of magnitude difference in capture area.
> Sure, ANY PN device can in someway be a radiation detector, but the Geiger
> tube has a hundred times more capture volume than most any PN device.
> So as far as giving an idea of background radiation, I cannot see these
> point source detectors as much more than a curiosity. Or I am missing
> something. I think the best detector is a LCD display with background
> plazma lighting. Bias the lighting electrodes just below threshold and
> any event anywhere in the 1/2 square foot area should be detectible?
> Subject: Re: An accurate do-it-yourself radiation meter
> Or am I missing something.
> Bob, WB4APR
> Tacos mailing list
> Tacos at amrad.org
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