Design and performance of bending-magnet beamline BL02B at the SSRF

The BL02B bending-magnet beamline at the Shanghai Synchrotron Radiation Facility (SSRF) has been constructed and is now operational for ambient-pressure photoelectron spectroscopy (APPES) and photon-in/photon-out spectroscopy (PIPOS) experimental use. Optical optimization was implemented for realization of high performance, e.g. photon flux, energy-resolving power and focus spot size. X-ray photoelectron spectroscopy experiments show that the energy range extends from 40 to 2000eV. Argon, nitrogen and neon gas core-shell excitation spectra indicate energy-resolving powers of over 1.4 x 10(4) @ 244eV, 1.0 x 10(4) @ 401eV and 7.0 x 10(3) @ 867eV, respectively. The measured photon flux is 1.3 x 10(11)photonss(-1) @ E/E = 3700 at 244eV at the expected sample position, for the SSRF electron energy of 3.5 GeV and electron current of 240mA. The spot sizes are 177 mu m x 23 mu m and 150 mu m x 46 mu m at the APPES and PIPOS samples, respectively.