TRAVELING-WAVE TUBES 



741 



-3-2-10 1 2 



b 

 Fig. 6 — Propagation parameters for/ = 10.0. 



0.2 0.4 0.6 0.8 t.O 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 

 PROPORTIONAL TO MAGNETIC FIELD, f 



Fig. 7 — Parameter x giving rate of increase of increasing wave vs. /, which is propor- 

 tional to magnetic field strength. 



circuit faster to get optimum results than for low fields. In Fig. 7, the max- 

 imum positive value of x is plotted vs. /. The plot serves to illustrate the 

 effect on gain of increasing the magnetic field. 



