Sean Kung

Online calculators and tools for spectroscopy and electron microscopy, free to use and share.

Calculators

UBC Nion Tools

Online calculators and analysis tools for the Nion U-HERMES 200, including EELS references and electron IMFP estimates.

Raman Tensors

Calculates symmetry compositions in polarization-resolved Raman scattering experiments.

STEM Ray Tracer

Interactive ray diagram of a dedicated STEM column — condenser, objective, projectors and EELS coupling, all as ideal thin lenses.

HAADF Vibration Simulator

Simulates a HAADF scan of a crystal under vibration and drift, then reads the vibration spectrum back from the FFT satellites — with the aliasing, row averaging and noise of a real scan.

ARPES k_z Calculator

Finds the exact photon energy at which photoelectrons have crystal momentum at the Brillouin zone center (Γ) or boundary. Photon momentum is included, so it is also valid for hard X-ray ARPES.

Vacuum Window Thickness

Sizes optical windows under a uniform pressure load, for vacuum chambers, cryostats and pressure cells. Round or rectangular, clamped or unclamped.