Design and Fabrication of Conduction-Cooled High Uniformity Superconducting Magnet

A high homogeneity superconducting magnet with conduction cooling is fabricated to calibrate Hall sensors for measuring mag-netic field in high energy particle accelerators. The magnet uses a single 1.5 W@4.2 K refrigerator. It combines indirect conduction of heat pipe and direct contact conduction to cool the magnet. The winding process of magnet are introduced and the magnetic field deviation is analyzed according to the manufacturing error. The excitation test and uniformity test are carried out and analyzed. The test results show that the uniformity does not exceed 20 ppm @ Ψ10 mm × 10 mm.