ECRF stray radiation studies in preparation of the operations of JT-60SACarlo Sozzi, Ken Kajiwara, Takayuki Kobayashi, Lorenzo Figini, Luca Garzotti, Alessandro Moro, Silvana Nowak and David TaylorEPJ Web Conf., 277 (2023) 01008DOI: https://doi.org/10.1051/epjconf/202327701008