Abstract

A high magnetic field in a superconducting cyclotron is associated with large magnetic forces acting on the magnet coils. These coils are placed in a position using support links that provide stability against the magnetic forces. However, the present configuration of our K500 superconducting cyclotron at VECC, Kolkata does not allow the superconducting coil to be centred with respect to pole tips. This causes field error and beam losses before extraction as observed in our superconducting cyclotron. An analytical model is developed to locate the optimal positioning of the superconducting coils based on support link forces. The present paper describes the methodology for positioning the superconducting coil that produces minimum field error and maintains a safe limit for link forces. Different analyses are presented and compared with experimental data of the superconducting cyclotron at VECC Kolkata.

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