Ramo-Shockley: i(t) = -q·v·∇ψ_w(x); weighting potential as Laplace Green's

Ramo-Shockley framework — the exact theorem for computing the instantaneous induced current on a readout electrode by a moving charge in any detector geometry (Ramo, Proc. IRE 27, 584, 1939; Shockley, J. Appl. Phys. 9, 635, 1938). Setup:…