Energy ramping simulation for TPS booster ring

The Taiwan Photon Source (TPS) booster ring accelerates electron beams from the linear accelerator (lin-ac) output energy of 150 MeV to 3 GeV for storage ring injection. In the event of partial RF station failure in the linac, the available beam energy may be reduced to 100 MeV. Preliminary machine tests have demonstrated multi-turn beam circulation in DC mode and successful acceleration from 127.5 MeV to 3GeV. Beam dynamics simulations using elegant evaluate the effects of dipole field errors, magnet multipole and alignment errors, chamber aperture constraints. Additionally, space charge effects at 100 MeV, due to the low relativistic factor, could lead to incoherent tune shifts, and potential beam loss. This study investigates the feasibility of operating the TPS booster at 100 MeV injection and ramping to 3 GeV with a focus on beam dynamics considerations