Ionization chamber

Robert Gawron has posted an update on his Ionization chamber project we covered previously: Ionization chamber is a device to measure radioactivity level. When air’s atoms are hit by radioactive particles, an ion-pair is produced. Ions has electric charge, if they are in electric field create by positive and negative electrodes, negative ions will move […]

Semiconductor radioactivity detector – part 2

Robert Gawron has been working on a radioactivity detector, that is available on GitHub: There are many ways to measure radioactivity level, semiconductor detectors sense interactions between ionizing radiation and p-n junction. Because in hobbyist area most popular are Geiger-Muller based detectors (in short: not a semiconductor but lamp based devices), I think it’s a […]

Radioactivity detection using very simple ionization chamber and a single J-FET transistor

Robert Gawron writes: Today I will show a very simple ionization chamber that can detect radioactivity. I was able to detect with it ionizing radiation from a smoke detector (Am241 isotope). It’s also immune to electromagnetic interference (EMI) due to a good shielding. This device doesn’t explicitly use any power supply. It’s connected to a […]

Semiconductor radioactivity detector

Robert Gawron has been working on a semiconductor radioactivity detector project: Currently I’m trying to make a working version of a radioactivity detector that uses semiconductor as a sensor. It’s a different approach than Geiger-Muller detectors, more complicated, but also much more interesting. While Geiger-Muller counters can only provide information about the amount of particles […]