Yamada, K. Fujimaki, M. Imao, H. Kamigaito, O. Komiyama, M. Kumagai, K. Nagatomo, T. Nishi, T. Okuno, H. Ozeki, K. Sakamoto, N. Suda, K. Uchiyama, A. Watanabe, T. Watanabe, Y. JACoW Publishing Geneva, Switzerland 2673-5504 978-3-95450-234-9 10.18429/JACoW-SRF2023-MOIXA04 English 30-37 operation linac cyclotron heavy-ion vacuum Contribution to a conference proceedings 2023 2023-09 https://doi.org/10.18429/JACoW-SRF2023-MOIXA04 https://jacow.org/srf2023/papers/moixa04.pdf The RIKEN superconducting heavy-ion linac, so-called SRILAC, has been successfully operating for almost four years, and continuously deliver a heavy ion beam for a super-heavy-element synthesis experiment. 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 pulse conditioning. This talk will share the experiences and lessons learned from four-year operation with low beta SC-cavities.