Study of the Models of Superconducting Dipole Magnet for the UNK

Abstract

The basic element of the superconducting (SC) dipole magnet for the UNK is a shell-type two-layer coil with an inner diameter of 80 mm and cold iron. This design will use SC wires consisting of o 6 µ m filaments and having the minimum critical current density of 2.3.105 A/cm2 in the 5 T field at 4.2 K. The current carrying element is a Rutherford-type SC cable consisting of 19 strands with 9 coated with the Sn+5% Ag alloy. This work presents some results on the study on training, mechanical stability, ac losses, static heat leaks, ramp rate characteristics of SC dipole models for the UNK with two types of cable insulation. Some results on measuring and calculating the transfer function and the bore field nonlinearities of short and full-scale models are also presented.