TO ARRAY 



Figure 4, — Block diagram of electrical and electronic equipment. 



together with the cathode were energized in 

 a repeating sequence which produced a con- 

 tinuously moving electrical field throughout 

 the array. The peak current was about one- 

 fifth of that which would have been required 

 to energize all of the electrodes at one time; 

 however, the average power consumption was 

 about the same for the sequential pulsing as it 

 wovild have been for simultaneously energizing 

 the electrodes. 



Figure 6 shows the equipotential lines, pre- 

 pared from analog plotting, created about the 

 electrodes as they were momentarily energized 

 by pulse No. 4, The numbers in the figure 

 represent the percentages of applied voltage 

 frona positive to negative electrodes. The pat- 



tern of equipotential lines from each of the 

 five pulses is similar to that illustrated for 

 pulse No, 4, The principal differences are near 

 the apex of the array where the convergence 

 of the rows of electrodes causes some dis- 

 tortion. 



Electrical Conditions 



The electrical conditions of the experiment 

 were: ( 1 ) pulse frequencies of 1 and 1 5 pulses 

 per second (2 and 3 pulses per field per 

 second, respectively, when five fields were 

 pulsed in sequence); (2) pulse durations of 25 

 and 50 msec; and (3) applied voltages of 140 

 and 180 v. at the electrodes. 



