Abstract
A new parameter which is obtainable with a breaf calculation is introduced for simplification of the design procedure of current leads for superconducting magnets. The parameter enables us to draw a useful design chart without explicit consideration of such quantities as conductor length, cross-sectional area, heat transfer coefficient and cooling perimeter. This chart gives to a wide variety of current leads the detailed information on the optimum design-viz. geometric dimension, heat flow into liquid helium and pressure drop of coolant. An adiabatic approximation derives a simple expression for reliability of current leads in the case of an accidental decrease or stop of the coolant flow. Change in the cross-sectional area along the conductor is shown to improve the current lead performance to some extent.
