40 



BELL SYSTEM TECHNICAL JOURNAL 



•J 0.4 



0.4 0.5 O.a 



RELATIVE RADIUS 



Fig. 6 — End plate currents in TM 11 mode. 



4 



0.4 0.5 0.6 



RELATIVE RADIUS 



Fig. 7 — End plate currents in TE 01 mode. 



