Useful Calculators

Distance Calculator

Resolution Calculator

Wavelength to Energy Converter

Energy to Wavelength Converter

Bragg to Energy Converter

Energy to Bragg Converter

X-ray Photon Flux Calculator

To calculate the photon flux incident on a silicon pin diode of given characteristics

This calculator does not take electron-hole recombination into account.

The calibration is valid from 5 keV to 20 keV; for details of the calculation used, and the assumptions made, please see the paper referenced below.

Please edit the default values:

Bear in mind that specific damage will almost certainly occur in your crystal before the Henderson limit is reached and the presence of any heavy atoms will dramatically increase the absorbed dose. Please use RADDOSE to estimate this (web interface coming here soon).

This dose estimate assumes a tophat 100 x 100 micron beam incident on a HEWL crystal of the same size with no heavy atoms present. It will probably give very strange results ouside the range 5.5-20keV and should be considered no more than a ballpark figure.

Citing

For details on the theory behind the calculator, what diodes it is and isn't valid for and the limitations of the model please see the paper below.

Determination of X-ray flux using silicon pin diodes
Robin L. Owen, James M. Holton, Clemens Schulze-Briese and Elspeth F. Garman
J. Sync. Rad. (2009) 16, 143-151
Link to manuscript 

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