In spectroscopy, spectral flux density is the quantity that describes the rate at which energy is transferred by electromagnetic radiation through a real or virtual surface, per unit surface area and per unit wavelength (or, equivalently, per unit frequency) It is a radiometric rather than a photometric measure In SI units it is measured in W m −3, although it can be more practical toXRayBob Minification, Flux, & Brightness Gain Math Examples Watch later Share Copy link Info Shopping Tap to unmute If playback doesn't begin shortly, try restarting your device You'reIn order to make it easier for the user to calculate flux on the xray beam lines the following graphs are presented The first is a plot of flux vs energy for several of the insertion device beam lines at SSRL and, for comparison, the flux from BL 15, the original "EXAFS I"
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X-ray flux calculation