Performance of a twin position-sensitive Frisch-grid ionization chamber for photofission experiments Marius Peck, Uwe Bonnes, Joachim Enders, Alf Göök, Joerg Hehner and Stephan Oberstedt EPJ Web Conf., 239 (2020) 05011 Published online: 30 September 2020 DOI: 10.1051/epjconf/202023905011