Abstract
After completing the construction of the Taiwan Photon Source, the existing Taiwan Light Source (TLS) could lower its energy from 1.5 GeV to 1 GeV for VUV users. In order to provide high-brightness light source, the emittance of electron beam must be reduced as small as possible. This thesis will explore the possibility of designing a low emittance storage ring without altering the hardware configurations.Simulation results show that the minimum emittance of TLS could be reduced to 6.12 nm-rad with good dynamic aperture. However the lifetime is less than 2 hours and it will be an issue for future operation.