Layered Mirror Reflectivity vs Angle

• Layer Material: (enter chemical formula).
• Layer Density: gm/cm^3 (enter negative value to use tabulated values.)
• Layer Thickness: nm.
• Top Surface Roughness: nm (Sigma).
• Substrate Material: (enter chemical formula).
• Substrate Density: gm/cm^3 (enter negative value to use tabulated values.)
• Substrate Roughness: nm (Sigma).
• Polarization (-1 < pol < 1) where s=1, p=-1 and unpolarized=0.
• Photon Energy: eV.
  (NOTE: Energies must be in the range 30 eV < E < 30,000 eV).

• Scan Angle from degrees to degrees in steps (< 500).

To reset to default values, press this button: .

Material

The chemical formula is required here. Note that this is case sensitive (e.g. CO for Carbon Monoxide vs Co for Cobalt).

Density

If a negative value is entered, the chemical formula is checked against a list of some common materials. If no match is found then the density of the first element in the formula is used.

Grazing Angle

In keeping with the standard notation for the x-ray region the incidence angle is measured relative to the surface (NOT the surface normal).

Polarization

Pol = 1 corresponds to s-polarization (electric field perpendicular to the plane of incidence). Pol=-1 corresponds to p-polarization (electric field in the plane of incidence). Pol=0 for unpolarized radiation.

Output

A GIF plot may be generated for quick viewing of the results. If you need anything fancier, the results are provided as a text file for use with your favorite plotting package.