A realistic continuous source component

[Kim Lefmann]

Dear fellow simulators,

For McStas v. 1.5, I have written a new source component for a
continuous source. It models the wavelength distrubution as a sum of 3
Maxwellian distributions, which e.g. fits the PSD cold source very well.
  Other details:

- The shape is cubic (square)
- The sampling is uniform in lambda
- Absolute intensities are used
- Focuses the beam onto a rectangle at a distance (illumination should be
OK)
- PSI parameter values given in comments.

I whish you all good simulations

                     Kim

------------------------------
Kim Lefmann
Senior Scientist
Dept. Cond. Matt. Phys. & Chem.
Risoe National Laboratory

Phone: +45 46 77 47 26
Fax:   +45 46 77 47 90