A cyclotron has been evolving gradually since Ernest Lawrence arrived at an idea of a cyclotron in 1929 after coming across the paper on the first two-gap linac developed by Rolf Wideroe in 1928. Nowadays a variety of cyclotrons are widely utilized for not only academic research but also medical use and industry applications. During cyclotron evolution in past more than ninety years, various types of cyclotrons have been designed and developed to meet the academic and industrial needs. In this paper, the history of cyclotron evolution is traced from a technical point of view, while characteristics of cyclotrons are outlined. Prospects of cyclotron development are also mentioned briefly.

It has been over 50 years since Research Center for Nuclear Physics (RCNP) was established in Osaka University. In this article, overview of the cyclotron facility, its history and recent status are presented.

Research activities in the cyclotron facility at Research Center for Nuclear Physics (RCNP) are overviewed. Double-arm spectrometer, Grand Raiden and LAS at WS course, DC-muon-beam generator MuSIC, radio-active beam production at EN course, and neutron time-of-flight facility at N0 course will be introduced together with the recent results. A part of the outlook will be mentioned.

Cyclotron and Radioisotope Center (CYRIC) was established in 1977 as a joint-use research and education facility of Tohoku University to provide multi-purpose use of the cyclotron, high radioactivity of radioisotopes (RI), short-lived RI produced by the cyclotron, and education and training for the safe handling of RI. CYRIC has two cyclotrons. One is the HM12-cyclotron, which is used to produce positron emitting radionuclides. Another is the 930-cyclotron, which is the K110 AVF cyclotron, and can accelerate various ions to various energies. There are five experimental rooms in CYRIC. Various research is being conducted in each experimental room using unique equipment and instruments. One of features in the CYRIC 930-cyclotron is that it was designed for negative ion acceleration from the time of introduction. Recently, the negative ion acceleration project was restarted. A project for mass production of medical RIs using high intensity deuterium beam is progress.

Since Cyclotron and Radioisotope Center (CYRIC) was established as a multipurpose facility at Tohoku University in 1977, various experimental studies in a wide range of research fields including nuclear physics, nuclear engineering, ion beam analysis, nuclear pharmacy and nuclear medicine, etc. have been conducted using the cyclotron (Model 680; Sumitomo Heavy Industries (SHI)). In 2000, we upgraded the accelerator to a larger cyclotron (Model 930; SHI), and have expanded the research fields at CYRIC with higher energy proton beams and many kinds of heavy ion beams. In this paper, we would like to introduce some of the main studies which have been carried out over the past decades using the Model 680 and 930 cyclotrons.

The cyclotron facility at Institute for Quantum Medical Sciences, National Institutes for Quantum Science and Technology (QST-iQMS) has been in operation since it opened in 1974 as the first cyclotron facility for medical research in Japan. The success of the facility is due to continuous improvements and updates to the cyclotron and its associated equipment. In this report, we introduce our past activities regarding the cyclotron facility, an overview of the facility, and its operational status. In addition, the fire accident that occurred in November 2011 and its impact also be described.

It has been more than half a century since an accelerator was installed at our institute. During this period, we have been vigorously engaged in accelerator-based research and development, succeeded by several generations. We have presented one of the classic uses of accelerators and its medical applications by developing production methods for high-grade four short-lived nuclides for PET studies, various medium- and long-lived metal and halogen nuclides, as well as synthesis methods to label these nuclides efficiently. The present paper introduces a part of our past activities and restoration experiences after a fire accident and discusses the future of accelerator-based nuclide production and radiopharmaceutical development.

An AVF cyclotron with a K-value of 110 MeV was constructed in 1991 at Takasaki Ion accelerators for Advanced Radiation Application (TIARA) facility to provide high energy ion beams mainly for biotechnology and materials science. This paper first introduces the TIARA facility and describes developments of the cyclotron such as high stabilization of the cyclotron magnetic field and microbeam formation using a focusing magnet briefly. Research outcomes using the TIARA cyclotron are also described.

RIBF is a cyclotron-based heavy ion accelerator facility. RIKEN has built nine cyclotrons so far, and the five cyclotrons currently in operation will be introduced. The history of the facility will be described, followed by an introduction to each cyclotron, and finally, a summary of the results obtained here and future prospects will be presented.

Since 1971, Sumitomo Heavy Industries, Ltd. has developed various accelerators, mainly cyclotrons. The history of development is surveyed in the fields of large accelerators for universities and research institutes, drug synthesis systems for PET, proton therapy systems, BNCT systems, and RI production systems for nuclear medicine therapy.

The evolution of accelerator science from the beginning of the 20th century to date has opened the wisdom of mankind, such as the discovery of Higgs and particle beam therapy. For sustainable growth despite a variety of social problems, educational and outreach programs for the next generation of the field are required. For that purpose, we launched the program named “AxeLatoon.” In the program, a table-top cyclotron accelerator will be made in KOSEN by the students themselves. These activity units will be expanded at KOSENs around Japan and, finally, our goal is to hold the accelerator contest. This paper presents our program and current activities that started in 2020.

The sixth International School on Beam dynamics and Accelerator technology (ISBA23) was held for 10 days from August 3rd to 12th, 2023 at Pohang in Korea. ISBA23 was jointly hosted by Korea Atomic Energy Research Institute (KAERI) and Korea Accelerator and Plasma Research Association (KAPRA). After screening 83 registrant’s resumes and letters of recommendation, 70 students from Korea, Japan, China, Taiwan, India, and Thailand were finally admitted to the school. For 10 days, 20 professional scientists from Korea, Japan, China, Taiwan, Thailand, Germany, and the USA gave 30 valuable lectures and 14 hands-on training sessions with ASTRA and ELEGANT accelerator codes. During the school period, a strong typhoon, unusual for Korea in early August, made landfall, forcing changes in the school curriculum slightly, but the school was able to complete almost the entire curriculum without any major problem. Thanks to the generous financial support from 14 sponsors, the school was successfully completed. This is the first time that ISBA has been held outside of Japan, and it is a big step toward becoming a truly international accelerator school.

The Events Committee and the Activation Committee of the PASJ organized “first roundtable meeting for communication with students and companies/research institutions” on August 28th as an initiative for a sustainable PASJ. We will describe the purpose, planning and the preparation of this meeting and report issues for the future.

The sixth annual ISBA’23 (International School on Beam Dynamics and Accelerator Technology) was held in Pohang, Republic of Korea, from August 3–12, 2023. 75 students from 8 countries had the opportunity to learn about Accelerator Physics from basic knowledge to advanced topics and cutting-edge technologies while experiencing hands-on accelerator simulation training. Students were also invited to share their own research experience. We believe the school was successful in achieving its goals of educating young accelerator researchers and supporting their future careers, building networks, and providing a dedicated forum for intensive study of accelerators in Asia. Here we report on the activities and experiences of the students who attended the school.

The twenty-first symposium of the Japan Inter-Society Liaison Association Committee for promoting equal participation of men and women in science and engineering was held on 14. Oct. 2023 as in a hybrid format, Yayoi hall, University of Tokyo in person. The symposium discussion is briefly reported and the issues facing the accelerator society are considered.