Low emittance optics at the photon factory

We successfully reduced the emittance of the Photon Factory storage ring (PF ring) to as low as 28 nm-rad, which is very close to the theoretical minimum (27.3 nm-rad) under the present lattice configuration. The new low emittance optics had been already tried, however, we could not examine it sufficiently because of a poor injection rate. Recently, new kicker magnets developed for the new optics were installed in the ring. Since the injection rate of more than 1 mA/sec became steady, the new optics was fully examined. No difficulty was found up to the stored current of 500 mA. The operation with the new optics for users´ experiments will start in near future