Preface
This Activity Report covers scientific and technologicalactivities carried out using the UVSOR-III Synchrotron
in FY2020 (April 2020 - March 2021). We present
scientific examples of how the users study at the UVSOR
Synchrotron Facility.
The present UVSOR-III Synchrotron is one of themost advanced low-energy SR facilities of the 3rd
generation SR in the world and is now one of the criticalresources in doing molecular science. The UVSORIII Synchrotron has a small electron storage ring but has powerful 6-undulator beamlines (3 VUV and 3 invacuum soft X-ray undulators) with 8-dipole beamlines. We never stop improving and upgrading our microand nano-scale photoabsorption and photoemission approaches and in situ/operando measurements in theVUV 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 ~230 proposals, about ~1,000 individual
researchers counting total ~ 4,000 people*day/year. Most users stay for one or two weeks for experimenting. 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 and beamlines. The
FY2020 was a challenging year for all researchers, and COVID-19 issues gave a major impact on synchrotron
users around the world. Almost all the projects have been done after rearrangement of the beamtime,fortunately, however, we might be realized in the future there was a problem in experimental quality in asense of limited manpower in the experiments as well as a lack of experience for on-site experiments of thestudents. The details on the action are described in the Activity Report.
On the experimental side, technology development will not stop, hence we will make a progress on theimaging-related techniques to inspire advanced molecular science. We have started to construct the newendstation at the undulator-based soft X-ray beamline BL6U. The new apparatus of the photoelectron
momentum microscope is developing day by day. Indeed, the project was affected a bit by COVID due toa delay of the construction term and installation steps, etc. In the beamline BL1U, we have conducted indeveloping the novel light sources, including pulsed-γ ray and their use for the measurements. To optimize
the high-power laser light to UVSOR-III for versatile use, we arranged the endstation layout of BL1U. 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 started to discuss the possibility to construct the post-UVSOR-III as a long-term plan for sustainable
development. We look forward to receiving your feedback and suggestions on the continuing evolution ofthe UVSOR Synchrotron Facility. And we hope many users will perform excellent work by fully utilizing theUVSOR-III Synchrotron as a unique international hub for the SR research in advanced molecular science.

April 2021
Satoshi Kera
Director of the UVSOR Synchrotron Facility