Table 1. Average value of δ for each transverse electric field (E_T) in U₀=1 to 20 eV, θ=0° to 90°, and φ=0° to 360°.

ET [V/m]	δA: A (0, 0, 0)	δB: B (0, 2R, 0)	δC: C (R, R, 0)	δD: D (−R, R, 0)
0	2.9	1.8	2.3	2.4
1.0×105	2.8	1.8	2.0	2.4
2.0×105	2.7	1.8	1.9	2.5
3.0×105	2.6	1.7	1.8	2.5
4.0×105	2.4	1.7	1.8	2.4