««) BELL S^mm^^^mSl^mXl^fOURNAL 



And from this we obtain Ir.riJ ri3ua SDnBiDubnoo Anuria e ot bsJudiiJiu 





■»■" ^8 Id) 



[ 



moil ,;>i ebim^Mn^nMMiyc/ noh-ir, M'^'Um 



The total conductance is s, 



Gi + G2 = (Fz,(7ro) + /v(7^o))/o/4Fo. 



(h53) 



ni ,02! A 

 rrdiDubnoo 



(h54) 



In Fig. '139, (G1F0//0), (G2F0//0) and (GF0//0) are plotted vs 7^0 . 

 It may be seen that while the conductance due to transverse fields may be 

 negative, the total conductance is always positive. 



15 2 2,5 3.0 3 5 A.0 4.5 5.0 5; 

 RADIUS OF TUBES, 7 Tq , IN RADIANS 



Fig. 139. — Gaj) loading factor vs radius of tubes forming gap measured in radians. 

 The tul)es are supposed to he filled Avith uniform electron flow. The curve involving 

 G\ is that for longitudinal effects, that involving Gi is for transverse effects, and that 

 involving G is for both combined 



This example tends to exaggerate the effects of transverse fields because 

 the beam is assumed to fill the whole tube. In an actual case the beam 



