cavity { Cavity modes in cartesian box excited by a current loop } Region { Grid { J = 20 x1s = 0.0 x1f = 0.1 n1 = 1.0 K = 20 x2s = 0.0 x2f = 0.1 n2 = 1.0 Geometry = 1 } Control { dt = 1E-11 } Species { name = positrons m = 9.11E-31 q = 1.6e-19 } Conductor { j1 = 0 k1 = 0 j2 = 0 k2 = 20 normal = 1 } Conductor { j1 = 0 k1 = 20 j2 = 20 k2 = 20 normal = -1 } Conductor { j1 = 20 k1 = 20 j2 = 20 k2 = 0 normal = -1 } Conductor { j1 = 0 k1 = 0 j2 = 20 k2 = 0 normal = 1 } Iloop { j1 = 0 j2 = 20 k1 = 0 k2 = 10 Current = 1 frequency = 1.5e9 C = 0 A = 1 tpulse = 3.33e-10 a0 = 0 trise = 0 tfall = 0 } }