.. kiessig_calculator_help.rst .. This is a port of the original SasView html help file to ReSTructured text .. by S King, ISIS, during SasView CodeCamp-III in Feb 2015. .. |pi| unicode:: U+03C0 .. |Ang| unicode:: U+212B Kiessig Thickness Calculator Tool ================================= Description ----------- This tool is approximately estimates the thickness of a layer or the diameter of particles from the position of the Kiessig fringe/Bragg peak in NR/SAS data using the relation (thickness *or* size) = 2 * |pi| / (fringe_width *or* peak position) .. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ Using the tool -------------- To get a rough thickness or particle size, simply type the fringe or peak position (in units of 1/|Ang|\) and click on the *Compute* button. .. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ .. note:: This help document was last changed by Steve King, 01May2015