[mcstas-users] Making a component GROUP-compatible

Peter Kjær Willendrup pkwi at fysik.dtu.dk
Tue Nov 25 11:07:06 CET 2014

Dear Sylvain,

I would suggest you take a look at Elliptic_guide_gravity by Henrik Bo Hoffmann Carlsen and Mads Bertelsen from Uni Copenhagen. If I remember correctly, it has exactly the properties you are looking for (and further takes gravity into account).

It is used in the following example instruments included with the last McStas release:


Mads is the “expert” on using this component for various complex arrangements, I am putting him cc: here in case you need further, specific help.



On 25 Nov 2014, at 10:49 , DESERT Sylvain <sylvain.desert at cea.fr<mailto:sylvain.desert at cea.fr>> wrote:

I am using the contributed component Guide_four_side from T. Panzner of PSI which doesn’t support the GROUPing method.
My need is to simulate an elliptic guide where both vertical walls don’t share the same focal point.
Guide_anyshape is also not a solution since it’s not possible to get different m-values for each side of the guide.
Any idea how to make the component GROUP compliant?
Any other idea how to simulate such a guide?
Best wishes,

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