DRIVE SYSTEM INSTRUMENTATION FOR VEC SCC AXIAL-HOLE MAGNETIC FIELD MEASUREMENT

Characteristics of beam in the central region of the superconducting cyclotron are to a large extent influenced by the magnetic field it experiences during its passage through the axial-hole. Accurate knowledge of magnetic field in axial-hole is required in order to design the central region components and position the extraction elements. A probe drive with high resolution and repeatability was developed along with the required HMI to map the magnetic field through out this hole from median plane upto 3 meter above it. This paper describes the drive system, its control, data acquisition and instrumentation scheme.