Characteristic features of an ionization system with semiconducting cathode B. G. Salamov, Ş. Altındal, M. Özer, K. Çolakoğlu and E. Bulur Eur. Phys. J. AP, 2 3 (1998) 267-273 Published online: 15 June 1998 DOI: 10.1051/epjap:1998192