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u [2009/08/06 15:41]
clare created
u [2009/08/27 12:20] (current)
clare
Line 1: Line 1:
 ====== u ====== ====== u ======
 +
 +**[//​user_defined_convolution//​ E //min// E //max// E]...**
 +
 +User defined convolutions are convoluted into phase peaks and can be a function of X. The //​min/////​max//​ equations are mandatory, they define the x-axis extents of the //​user_defined_convolution//​ where min <= 0 and max >= 0. For example, a sinc function can be convoluted into phase peaks (example AU111.INP) as follows:
 +
 +str
 +
 +   prm k 10 min 0.001 max 100
 +
 +   user_defined_convolution =
 +
 +      If(Abs(X) < 10^(-10), 1, (Sin(k X) %%/(%%k X))^2);
 +
 +      min -3 max 3
 +
 +**[//​use_tube_dispersion_coefficients//​]**
 +
 +Forces the use of Laboratory tube anomalous dispersion coefficients instead of the more accurate data from http://​www‑cxro.lbl.gov/​optical_constants/​asf.html.
  

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