Figure 10.

(Color online) Plots of peak positive and peak negative pressure in the focal plane ($z=181.8$ mm) for the new lens. Experimental data is recorded in four directions from the z-axis $(x+,\hspace{0.17em}x-,\hspace{0.17em}y+,\hspace{0.17em}y-)$. Numerical data is mirrored across $r=0$ to aid in visualization. (a) 15.8 kV. (b) 16.8 kV.