Preface
This Activity Report covers scientific and technologicalactivities carried out using the UVSOR-III Synchrotron
in FY2019 (April 2019 - March 2020). We present
scientific examples of how the users study at the UVSOR
Synchrotron Facility.
The present UVSOR-III Synchrotron is one of the mostadvanced low-energy SR facilities of the 3rd generation
SR in the world and is now one of the critical resourcesin doing molecular science. The UVSOR-III Synchrotron
has a small electron storage ring but has powerful 6-undulator beamlines (3 VUV and 3 in-vacuum soft X-rayundulators) with 8-dipole beamlines. We never stop improving and upgrading our micro- and nano-scale
photoabsorption and photoemission approaches and in situ/operando measurements in the VUV and soft X-ray
regions, based on our strategic international collaboration program in molecular science. We are grateful to all
the people who use our facility and support our efforts.
UVSOR operates for 40 weeks/year (ca. 2,200 h user time), accepts ~220 proposals, about 1,300 researchers
meaning ca. 100 people/beamline and ca. 30 people/week. Most users stay for one or two weeks for doing theexperiment. To continue high-level achievements in science and technology at the UVSOR-III Synchrotron,
our in-house staff is constantly committed to maintaining and improving high-performance accelerators andbeamlines. The FY2020 would be a challenging year for all researchers, and COVID-19 issues will have a major
impact on synchrotron users around the world. We decided to operate the UVSOR as planned after completingthe scheduled maintenance weeks, however the most of users may not come to the experiments at UVSOR
because of limitation of the working activity by COVID-19. Considering the situation, it was decided to allocate
a beamtime to the second half period by transferring the same project approved in the first half period with orwithout beamtime cancellation.
In terms of personnel, an associate professor, Yoshitaka Taira, joined to UVSOR from April 2020. We hope hewill spice up some of the uniqueness of our facility, that is, a development and utilization of novel quantum
beam sources as like gamma-ray related experiments dedicated at the beamline BL1U.
On the experimental side, technology development will not stop, hence we will make a progress on theimaging-related techniques to inspire the advanced molecular science. We have started to construct the newendstation at the undulator-based soft X-ray beamline BL6U. The new apparatus is based on the momentumresolved photoelectron emission microscopy and spectro-microscopy, we call it “photoelectron momentummicroscope”. The project will be developed by three steps, and in the end the novel function will be uniquelyadded to our apparatus to keep future developments ranging for 10-15 years in the UVSOR Synchrotron Facility.
The advanced SR-related instrument will offer opportunities in characterizing the electronic structure of surface
atomic sites, thin films, molecular adsorbates, bulk crystals, and so on.
We look forward to receiving your feedback and suggestions on the continuing evolution of the UVSOR
Synchrotron Facility. And we hope many users will perform excellent work by fully utilizing the UVSOR-III
Synchrotron as a unique international hub for the SR research in advanced molecular science.

April 2020
Satoshi Kera
Director of the UVSOR Synchrotron Facility