HALL PROBE REGULATION OF EXPERIMENTAL POWER SUPPLIES

The Hall mode of operation utilizes a signal derived from the magnetic field of an experimental magnet to provide the power supply regulator with the information necessary for it to regulate the magnet current. Regulation of the field to 0.1% is possible with the Hall probes and regulators used at the Cosmotron. The Hall Effect is a phenomenon whereby the voltage developed across a semiconductor or metal is a function of the current through the material and the magnetic field intensity perpendicular to the direction of current flow. Circuitry is required to maintain the probe at a constant temperature and to maintain a constant Hall current. The output Hall voltage is linearly related to the magnetic field with its absolute value being determined by the level of the Hall current. Instructions for installation and operation of the Hall probes are given. (H.G.G.