Actually, we still recommend a professional high voltage detector for serious work, but you’ve got to like this electric field detector that [Alessandro] recently put together. The detector ...

He built a simple electric field detector, which is just a battery, LED and FET, with an open-ended resistor on the FET’s gate. [Jay] 3D printed a simple cylindrical mold and stuck aluminum foil ...

TPCs generally have photosensitive parts to detect scintillation and an electric field that guides free electrons to one end of the detector, where – traditionally – a wire mesh picks them up ...