Determination of the critical current for a superconducting conductor by using the part of the resulting magnetic field that is out of phase with the external field

摘要

A method for the determination of the critical current for a conductor including superconducting material. The conductor is brought into a superconducting state, and a varying external magnetic field is generated through which said conductor is conveyed. A first measurement means is used to carry out a first contact-free measurement of the resulting magnetic field that occurs as a consequence of the influence of said external magnetic field on the conductor. The part of the resulting magnetic field out of phase with the external magnetic field is determined, and the critical current of the conductor is determined on the basis thereof.