Measurement of the electric potential and the magnetic field in the shifted analysing plane of the KATRIN experiment - Aker, M; Batzler, D; Beglarian, A; Behrens, J; Beisenkoetter, J; Biassoni, M; Bieringer, B; Biondi, Y; Block, F; Bobien, S; Boettcher, M; Bornschein, B; et al. (EUROPEAN PHYSICAL JOURNAL C, 2024)