10 



z 

 o 



Q. 



o 



lU 



I- 



UJ 



o 



20 

 15 



to 



m 5 

 m 



V 

 lU 



o 



2 A 6 6 10 12 14 16 



Z IN INCHES ALONG DRIFT TUBE (O IS 0.95" FROM ANODE) 

 B = 53.9 GAUSS, Be =" '5.2 GAUSS, V = 2200 VOLTS, I = 4 I MA PEAK 



18 



Fig. 3 — The longitudinal distributions of the A^ = 2 proper frequency-, 157 

 mc, as well as its "satellite" 76.2 mc, and microwave noise power, are shown here, 

 with fields adjusted for greatest amplitude of the proper frequency at 2 = 15 

 inches. 



861 



