Investigation of Orbits and Stability of Negative Ions of Hydrogen (H~-) in Simulated Main Magnetic Field of AVF Cyclotrons

摘要

This paper describes equilibrium orbit and stability of negative hydrogen ions (H~-) on a four sector of tight design giving 30 MeV protons. We simulated radial and vertical changes of main magnetic field of Cyclone-30 by multi degree and Fourier functions. Based on measured main magnetic field by IBA (Ion Beam Application), we calculated coefficients of these functions and investigate equilibrium orbit and stability includes Betetatron frequency, radial and vertical motion and etc. Advanced graphical tools of MATLAB give good visualization features to created models. The simulation results are in good agreement with experimental data.