A 4 T superconducting magnet for gyrotron with homogenous regions of 150 and 250 mm

The development of a high frequency, high harmonic gyrotron based on a superconducting magnet is described. A conduction-cooled superconducting magnet with the warm room of φ 80 mm and the center field of 4 T was designed and fabricated. The superconducting magnet has two homogenous regions with length of 150 mm and 250 mm. The homogeneity of magnetic field is about ±0.25%. All the homogeneous regions are with the same starting point and the field is decayed to 1/6-1/7 from the front point of the homogeneous region to 195 mm. This paper describes the design and fabrication of the superconducting magnet for Gyrotron.