NoMoS: An R × B drift momentum spectrometer for beta decay studies Daniel Moser, Hartmut Abele, Joachim Bosina, Harald Fillunger, Torsten Soldner, Xiangzun Wang, Johann Zmeskal and Gertrud Konrad EPJ Web Conf., 219 (2019) 04003 Published online: 12 December 2019 DOI: 10.1051/epjconf/201921904003