Pulsed current source JANUS
JANUS is a compact, USB‑powered, bipolar capacitive power supply designed for driving miniature pulsed magnets. It features a 4 mF capacitor bank that can be charged to below 50 V, providing up to 5 J of stored energy.
A typical application of JANUS pulser is the powering of miniature pulsed magnets. For example, our Hall measurement station can generate above 0.25 Tesla when powered with this compact device.
In simple terms, JANUS is a capacitive energy‑storage module: it accumulates charge from the power source during the charging sequence and releases it into the load once charging is complete. The direction of the discharge current is determined by the position of the Start toggle, making it extremely easy to reverse the magnetic‑field polarity without physically switching the wiring. This is particularly useful for Hall‑effect studies, since the Hall signal is an odd function of 𝐵, whereas the magnetoresistance term is even (B2) and therefore does not depend on the direction of the magnetic field.
