SRF2025 - 22nd International Conference on RF Superconductivity

5 year operation of RIKEN SC-LINAC

MOA01

22 Sept 2025, 08:30

20m

Ito International Research Center

Board: MOA01

Invited Oral Presentation MC1: SRF Facilities Monday Oral Session: A

Speaker

Naruhiko Sakamoto (RIKEN Nishina Center)

Description

The RIKEN superconducting heavy-ion linac, so-called SRILAC, has been successfully operating for almost five years, and continuously deliver a heavy ion beam for a super-heavy-element synthesis experiment by fixing minor and major hardware troubles. The effects of a broken coupler in the early days and four years of operation have resulted in increased X-ray emission levels in several superconducting cavities, which have been successfully corrected by High Power Processing (HPP). Owing to the fine tunings of the control system of LLRF and cryogenic system the availablity more than 99 % has been achieved. This talk will share the experiences and lessons learned from five-year operation with low beta SC-cavities.