Okita, H. Ishi, Y. Kuriyama, Y. Mori, Y. Uesugi, T. JACoW Publishing Geneva, Switzerland 978-3-95450-205-9 10.18429/JACoW-Cyclotrons2019-TUP034 English 237-239 TUP034 target acceleration experiment proton betatron Contribution to a conference proceedings 2020 2020-06 https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP034 http://jacow.org/cyclotrons2019/papers/tup034.pdf An intense negative muon source MERIT (Multiplex Energy Recovery Internal Target) for the nuclear transformation to mitigate the long-lived fission products from nuclear plants have been proposed. For the purpose of proof-of principle of the MERIT scheme, a FFA (Fixed Field Alternating focusing) ring has been developed and beam experiments have been carried out. In this conference, the results of this study will be reported.