STEADY-STATE HALL LOSSES IN COMPOSITE CRYOGENIC CONDUCTORS

Three distinct numerical methods are developed and evaluated for predi cting the transverse Hall currents in long composite cryogenic conduct ors. These methods are applied to three different conductor geometries ; a double-strip, a square-jacketed and a round-jacketed conductor. Th e double-strip geometry is used as a simple example to illustrate the Hall effect in composite conductors and to compare results from the th ree calculational methods. Earlier experimental results on the anomalo us magnetoresistance of square-jacketed Al-Al alloy composite conducto rs are reanalysed using the present accurate numerical approaches. Imp roved agreement is obtained between experiment and theory compared wit h the earlier simplified models. Calculations and experimental data ar e shown for cases where the applied magnetic field is oriented at an a ngle with respect to the conductor. The calculated resistance variatio n with angle is shown to have the same form as the measured data. Good agreement is also obtained between the predictions of the closed-form analytical formulae of Kaneko and Yangai and the present finite eleme nt calculations for the Hall currents in AI-Cu round-jacketed composit e conductors.