Beam instabilities at the PLS storage ring

A simulation method to obtain beam tail distribution and beam lifetime in electron storage rings has been applied to the 2.5 GeV Pohang Light Source. The simulations were performed to obtain transverse and longitudinal tail distributions due to beam-residual gas bremsstrahlung, beam-residual gas scattering and intra-beam scattering at the Pohang Light Source. The beam lifetime that is obtained by the simulation is estimated to be around 19 hours in beam current of 180 mA. It is shown that the simulated beam lifetimes well agree with those of on normal operation