Yabashi, M. WEA05 2015 2015-12 As the first compact XFEL facility, SACLA has operated for users over three years since March 2012. SACLA has routinely generated XFEL light in a photon energy range from 4 to 15 keV with a pulse energy of 0.5 mJ at 10 keV and a pulse duration less than 10 fs [1,2], which corresponds to a high peak power of several tens gigawatts. One of the unique characters of SACLA is to produce two-color SASE XFEL light with a large separation of the two wavelengths over 30% by using variable-gap, in-vacuum undulators [3]. Another feature is to employ state-of-the-art X-ray optics and diagnostics, in particular, X-ray focusing optics: A two-stage focusing system successfully generates an extremely high intensity of 10²⁰ W/cm² by forming a 50-nm spot [4]. These advanced technologies enabled to explore unique researches in a field of quantum/non-linear x-ray optics [5,6]. Recently, SACLA has produced a number of scientific achievements in various fields of researches (see http://xfel.riken.jp/eng/research/indexnne.html). To expand experimental opportunities for users, we commenced construction of the 2nd XFEL beamline (BL2) in 2013. We installed a full undulator line and a beam line, being independent of those in the existing BL3. We started commissioning of the beamline on October 8th, 2014, and observed a first lasing on 21st. A first user experiment was performed on April, 2015.