dring { A dielectric ring is hit by a beam } Variables { x1max = .1 x2max = .02 Jmax = 16 Kmax = 16 } Region { Grid { J = Jmax x1s = 0.0 x1f = x1max n1 = 1.0 K = Kmax x2s = 0.0 x2f = x2max n2 = 1.0 Geometry = 0 } Species { name = electrons m = 9.11E-31 q = -1.6e-19 } Control { dt = 1.0E-11 ElectrostaticFlag = 1 } BeamEmitter { j1 = 0 k1 = 0 j2 = 0 k2 = 10*Kmax/13 normal = 1 speciesName = electrons thetadot = 0.0 I = 10 np2c = 1.0E7 v1drift = 1e8 v2drift = 0 v3drift = 0 v1thermal = 0 v2thermal = 0 v3thermal = 0 } Conductor { er = 1 Segment { j1 = 0 k1 = 10*Kmax/13 j2 = 0 k2 = Kmax normal = 1 } } Conductor { er = 1 j1 = 0 k1 = Kmax j2 = Jmax k2 = Kmax normal = -1 } Conductor { er = 1 j1 = Jmax k1 = Kmax j2 = Jmax k2 = 0 normal = -1 } DielectricRegion { er = 100.0 j1 = 3*Jmax/13 k1 = 3*Kmax/13 j2 = 10*Jmax/13 k2 = 10*Kmax/13 QuseFlag = 1 } Diagnostic { HistMax = 512 Comb = 2 Ave = 0 j1 = 3*Jmax/13 k1 = 3*Kmax/13 j2 = 3*Jmax/13 k2 = 10*Kmax/13 VarName = phi title = phi at edge of ring x1_Label = radius x2_Label = time } Diagnostic { HistMax = 512 Comb = 2 Ave = 0 j1 = 3*Jmax/13 k1 = 0 j2 = 3*Jmax/13 k2 = Kmax VarName = Q title = Charge at edge of ring x1_Label = radius x2_Label = time } CylindricalAxis { j1 = 0 k1 = 0 j2 = Jmax k2 = 0 normal = 1 } }