I(q) function calculator of concentric 3D/2D/1D shell models

This Javascript calculates the scattering curve I(q) of concentric shell models: sphere, disc (cross-section of long rods) or rod (thickness of large discs). Enter the number (<=16) of radii, the values for the radius R(i) and its electron-density c(i) (between R(i) and R(i-1)). The scattering curve I(q) of the spherical model (D=3) or of the cross-section (2D) or of the thickness (1D) will be calculated for Nr q-values from q = 0 to qz with a scaling factor f. The curves can be multiplied by q^n (with n being -2/-1/0/1/2) and an offset can be added (for vertical shifting of multiple curves). The values are listed in I(q) vs q (where I(q) and/or q can be lin or log, respectively) in arbitrary units and can be copied and pasted from the text-window into any text-file for further processing and graphical displaying. The plot itself can be saved as a png-image file (see options by placing cursor on plot).