[mcstas-users] Focusing monochromator

["Voigt, Jörg"]

Dear McStas users,
I would like to use a horizontally focusing monochromator with a virtual or point like source. The crystals should then be located approximately on the Rowland circle with radius L/sin(theta), while the lattice planes should be parallel to a circle  with Radius 2L/sin(theta), where L denotes the equal distance source-mono and mono-sample (symmetric Rowland configuration). Assuming a parallel incoming beam the lattice planes should be on a circle with radius 2*L/sin(theta), L being the distance between monochromator and sample, as also written in the documentation. But how can I correctly realise the case of a symmetric Rowland circle?

Thanks in advance

Jörg

-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 4969 bytes
Desc: not available
URL: <http://mailman2.mcstas.org/pipermail/mcstas-users/attachments/20170608/8a6174e1/attachment.p7s>