1535 
point and then proceed to integrate (108) numerically by means 
of the Runge-Kutta method. This proceedure was used to obtain 
the results shown for a few representative charge sizes in 
Figure 10. 
9.6 The results summarized in Figure 10 are then used to obtain 
expected wave shapes for various specific cases by using X%, 
for a given R and charge size to calculate a from eauation (97) 
and & from the definition & = Aa. The resulting & is 
then used in equation (91) tc obtain the wave shape or (92) 
to obtain an estimate of the rise time. 
Some typical results for 0.5 and 8 1b. charges are 
shown in Figures 11 and 12. Curves of rise time vs R for 0.5, 
8, 25 and 300 1b charges are shown in Figure 13, 
~ 59 = 
