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--- u [2009/08/27 11:20] – clare
+++ u [2025/09/19 15:18] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+====== 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.