Force Magnetometer for Reel-to-reel Assessment of Superconducting Tapes

An apparatus for critical current assessment in a superconducting tape which is driven by an electric motor.  The current in the motor is proportional to the torque produced by the motor, and the torque needed to move the tape through a magnetic field is proportional to superconducting current induced by a magnetic field.  Superconducting tapes can be used in various applications such as cables, transformers electric motors, and electromagnets.