mirror reflection

[Kim Lefmann]

Dear Peter,

The mirror component should not be difficult to use if you realize that it
should be rotated 90 degrees around the Y-axis to be used in a usual
geometry. Unrotated, the mirror just intersects the neutron flight
direction (z) at right angles. Perhaps we should write this in the 
manual(!)

The bottom nearest corner of the mirror is placed in Origo of the local
cordinate system, so you need to shift the mirror with respect to the beam
centre by "yheight/2", if you see what I mean.

I can see that this is not really a convenient component to use. If you
work with it for a little while and tell us how exactly you would like it
to work, we will rebuild it for you in a short while.

Did you, by the way, notice that McStas release 1.2. is out now? There are
especially some improved graphical front ends and an adaptive source,
which could be useful for you.
 
Yours, Kim

---------------------------

Kim Lefmann

Dept. Cond. Matt. Phys. & Chem.
Risoe National Laboratory

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

On Tue, 15 Feb 2000, Peter [iso-8859-1] Böni wrote:

> Dear Kim
> 
> In McStas there exists a component for reflection from a mirror. Somehow 
> I do not know how to correctly use it. The definition for the size of
> the
> mirror and the coordinate system are not in the same spirit as for the
> monochromator component. Is this correct? Do you have an example for a
> simulation that uses a mirror? Could you send me an example, if you have
> one?
> 
> Best regards    Peter
> 
>