ELECTRON BALLISTICS IN HIGH -FREQUENCY FIELDS 



349 



-0-5 



-10 



10077m 

 - rsxVo 



Cx» 



Fig. 15 — Electron velocities in the magnetron according to Posthumus. 



that is with a field equal to twice the cutoff value, for all frequencies less 

 than the equivalent value defined by the intercept of the Z = 2 line with 



