THE INTRINSIC MAGNETORESISTANCE OF CRYOGENIC JOINTS

An intrinsic joint resistance can arise due to circulating Hall curren ts flowing across the Joint interface between dissimilar metal conduct ors carrying transport current in a magnetic field. Calculations have been performed to determine this resistance for a number of generic jo int geometries, including butt, sandwich, and lap, as a function of th e magnetic field strength for Cu-Al and Cu-SC pairs. This type of join t resistance may play a role in the coupling loss and stability of fil amentary superconductors. The results are discussed in terms of their implication for superconducting coil and conductor design.