Design of the Integral Field Measurement System of Dipole Magnets

A new proton therapy facility (HUST-PTF) is under construction in the Huazhong University of Science and Technology. The integral field measurement system of dipole magnets was designed for the beamline of HUST-PTF. The design goal is to build a reliable, precise, and automatic measurement system, which is accurate enough to characterize the magnetic field quality of the dipole magnets. The system consists of long coils, precision motion stages, data acquisition, and control system. The design of the whole system and the measurement method is described in this paper. The design and fabrication of the long coil are also discussed, and the errors from the geometric frame of coil and electronic equipment are analyzed.