Spatio-temporal measurement of beam properties in the PLS diagnostic beamline

A diagnostic beamline is being constructed in the PLS storage ring for measurement of electron‐ and photon‐beam properties. It consists of two 1:1 imaging systems: a visible‐light imaging system and a soft X‐ray imaging system. In the visible‐light imaging system, the transverse beam size and beam position are measured with various detectors: a CCD camera, two photodiode arrays and a photon‐beam position monitor. Longitudinal bunch structure is also investigated with a fast photodiode detector and a picosecond streak camera. On the other hand, the soft X‐ray imaging system is under construction to measure beam sizes with negligible diffraction‐limited error. The X‐ray image optics consist of a flat cooled mirror and two spherical focusing mirrors.