Physicist, electrical engineer, and radio ham Tim “DJ8TK” Kuhlbusch desires to place a particle physics lab in your pocket with the BetaBoard, a low-cost particle detector within the footprint of a enterprise card — and which will be produced in small portions for lower than $10 every.
“This challenge is an inexpensive semiconductor particle detector for instructional functions,” Kuhlbusch explains of the BetaBoard. “I used to be impressed by the CERN DIY particle detector, however needed to make it extra accessible and less complicated to make use of. Aside from the tutorial functions, I’ve seen that is fairly a pleasant enterprise card for me: it represents my physics background, electrical engineering expertise, and in addition my curiosity in sharing information. All whereas matching the form-factor of a enterprise card.”
The BetaBoard builds on a CERN challenge and places a particle detector in your pocket on the lowest value but. (📷: Tim Kuhlbusch)
The BetaBoard builds atop a home-made particle detector designed by Oliver Keller whereas at CERN, and serves the identical goal: to detect and distinguish particles and electrons and measure their energies between 33keV and 8MeV. Kuhlbusch’s tackle the challenge, although, goals for a decrease value whereas additionally decreasing noise ranges, and makes the transfer to the favored and low-cost Raspberry Pi RP2040 microcontroller as its driving machine.
The most recent revision of the BetaBoard design makes use of a stack of 4 PCBs, with the electronics housed within the lowest of the 4. The subsequent two layers act as a defend for the analog electronics, which embody amplified PIN diodes performing as alpha and beta particle detectors, with a high layer for cover internet hosting a schematic showcasing the machine’s working precept. By overlaying the home windows over the particle sensors with electrical tape, mild is excluded — and the diodes can react to the goal particles as an alternative.
Regardless of its compact measurement and low value, the detector delivers outcomes simply ok for instructional experimentation. (📷: Tim Kuhlbusch)
“For example for the experiments potential with this small detector I’ve measured the speed of a 15g bundle of potassium carbonate,” Kuhlbusch writes of the BetaBoard’s testing. “As a result of low exercise we solely get a number of recorded pulses per minute. Subsequently every information level within the determine [pictured] took 23 minutes. It’s clearly seen that the speed drops with rising distance.”
The challenge is documented in full on Hackaday.io, with {hardware} design recordsdata and supply code revealed to GitHub underneath the permissive BSD 2-Clause license.