Summary
The Photon Factory has two light source accelerators. The PF ring (2.5 GeV) has been operated since 1982. This is the first dedicated synchrotron light source in Japan, which supply X-rays. Several improvements of accelerator have been made and resulted in high-brilliant light source. The PF-AR (advanced ring) is a unique light source, that is, high-intensity pulsed synchrotron source which is effective for time resolved experiments. There are 50 experimental stations at PF and PF-AR
