Abstract: A magnetic field generator. In one embodiment, the magnetic field generator includes a drive circuit including a MOSFET gate driver having an output terminal; a drive capacitor having a first and second terminal, a tank circuit including a tank circuit capacitor having a first and second terminal and a field-producing coil having a first and second terminal, wherein the first terminal of the tank circuit capacitor and the first terminal of the field-producing coil comprise the first terminal of the tank circuit, wherein the second terminal of the tank circuit capacitor and the second terminal of the field-producing coil comprise the second terminal of the tank circuit, wherein the first terminal of the drive capacitor is in electrical communication with the output terminal of the MOSFET gate driver, and wherein the second terminal of the drive capacitor is in electrical communication with the first terminal of the tank circuit.

Abstract: A method and apparatus for measuring the change in temperature of a material being heated. In one embodiment, the method includes introducing particles having magnetic susceptibility into the material; heating the material and particles; measuring, using a circuit having a resonant frequency, the change in the resonant frequency of the circuit as the temperature of the particles changes; and correlating the change in resonant frequency to a change in temperature. In one embodiment, the apparatus includes a collection of magnetic particles in contact with the material undergoing heating; a resonance circuit including a tank circuit including a coil and capacitance and having a resonant frequency; an alternating current variable frequency source capable of tracking changes in the resonant frequency of the tank circuit to maintain the frequency of the alternating current at the resonant frequency of the tank circuit; and a processor in communication with the alternating current source.