  A conduction-cooled superconducting magnet producing a transverse field of 4
Tesla has been designed for the new generation multi-field coupling measurement
system, which was used to study the mechanical behavior of superconducting
samples at cryogenic temperature and intense magnetic fields. Considering
experimental costs and coordinating with system of strain measurements by
contactless signals (nonlinear CCD optics system), the racetrack type for the
coil winding was chosen in our design, and a compact cryostat with a two-stage
GM cryocooler was designed and manufactured for the superconducting magnet. The
magnet was composed of a pair of flat racetrack coils wound by NbTi/Cu
superconducting composite wires, a copper and stainless steel combinational
form and two Bi2Sr2CaCu2Oy superconducting current leads. All the coils were
connected in series and can be powered with a single power supply. The maximum
central magnetic field is 4 T. In order to support the high stress and uniform
thermal distribution in the superconducting magnet, a detailed finite element
(FE) analysis has been performed. The detailed design of superconducting
racetrack magnet system is described in this paper.
