SRF2025 Chair welcome

  It is my pleasure, on behalf of RIKEN Nishina Center and the SRF2025 organizing committees, to welcome you to the 22nd International Conference on RF Superconductivity (SRF2025) from September 21st to 26th in Tokyo. The conference series has a history of providing a vivid forum for SRF scientists, engineers, students and industrial partners to present and discuss the latest developments in the science and technology of superconducting RF for particle accelerators. For 2025 we move the conference series to Tokyo, Japan, one of the most exciting cities in the world.

  The SRF Conference since its inaugural event in 1980, has been held every other year for over 40 years, rotating its location between Europe, North America, and Asia. Initially, discussions primarily focused on the development of high-performance cavities for the International Linear Collider, a high-gradient electron accelerator, leveraging the technology of superconducting RF. Recent progress of the cavity performance is outstanding introducing new materials and new surface processing recipe. Furthermore, in recent years, with the establishment of the basic technology of superconducting cavities, their introduction or consideration for large-scale user facilities for not only electron but also proton and heavy ions has been actively discussed. This has transformed the conference into a platform not only for the development of high-performance superconducting cavities but also for discussing technologies for a long-term operation in user facilities. Moreover, its application scope has rapidly expanded to detectors for dark matter, axions, gravitational waves, and quantum computers.

  In 2020, SRILAC (Superconducting RIken Linear AcCelartor) achieved beam acceleration for the first time and has since entered the stage of long-term operation, resolving various issues of different sizes. In 2025, marking the fifth year of operation, RIKEN will host the conference. Over six days, researchers, and technicians from both domestic and international arenas in the field of superconducting RF will gather, engaging in a wide range of discussions from fundamentals to applications through oral and poster presentation sessions.

  Tutorial sessions will be held before the conference from September 18th to 20th on the RIKEN Wako campus. A tour of the RIBF for nuclear physics research will be conducted on the last day of the conference.

  Following the long and successful tradition, SRF’25 will feature invited and contributed talks, as well as poster sessions and an industry exhibition. A stimulating scientific program will be complemented by social events that promote informal knowledge exchange. There are several sponsorship opportunities for all those who would like to support the event and gain visibility.

  The conference will provide opportunities for students and early-career researchers to present their work. We anticipate being able to provide some financial support for a significant number of students from all regions to attend the conference. A student poster session will be held on Sunday in conjunction with the welcome reception.