[mcstas-users] Frame overlap mirror creation

[Peter Kjær Willendrup]

Hi Andrew,

On 14 Jun 2021, at 02.22, Andrew Nelson <andyfaff at gmail.com<mailto:andyfaff at gmail.com>> wrote:

I am wondering about the best way to create the frame overlap mirror in McStas. The FOM I need to create consists of a non-tapered rectangular guide (m=0 on top, m=3 on the sides, m=1 on the bottom) of 500 mm in length, 20 mm high, 50 mm wide. There is then a mirror (Ni, m=1) running down the length of this guide, running from the bottom of the guide at the front (-z) to the top of the guide at the back (+z)

I suggest taking a look at Pol_guide_mirror.comp which is intended for exactly this purpose. I admit it is a little confusing that the component is not named anything suggesting that it can be used like this. :)

I will consider making a name-change or an “alias” component to clear this up.

I couldn't find a previous example to go off. Would it be suitable to create a normal rectangular guide component with the host characteristics, then have a subsequent inclined mirror component that coincides with the host guide? Or would this confuse things?

How does one make composite optics components?

The thing is, one does not really… :)

There _are_ ways to do this with a set of independent mirrors and lots of logic / programming in the instrumentfile - but it gets long and complicated, writing a fresh component from scratch is probably easier.

That being said, the Union subsystem could eventually become a vehicle to implement “composite components” also for reflecting optics, but at the moment the focus in that code is on the physics of bulk material properties.


Best and hope this helps,
Peter

Peter Kjær Willendrup
Forskningsingeniør, Specialkonsulent
Næstformand for DTU Fysik LSU

DTU Physics


[cid:b6339554-7f28-441d-9f31-5944f811397c at win.dtu.dk]


Technical University of Denmark


[cid:e108e480-fcab-46e2-9531-b38165079572 at win.dtu.dk]



Department of Physics
Fysikvej
Building 307
DK-2800 Kongens Lyngby
Direct +45 2125 4612
Mobil +45 2125 4612
Fax +45 4593 2399
pkwi at fysik.dtu.dk<mailto:pkwi at fysik.dtu.dk>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman2.mcstas.org/pipermail/mcstas-users/attachments/20210614/239c175c/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.gif
Type: image/gif
Size: 58 bytes
Desc: image001.gif
URL: <http://mailman2.mcstas.org/pipermail/mcstas-users/attachments/20210614/239c175c/attachment-0002.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.gif
Type: image/gif
Size: 1055 bytes
Desc: image002.gif
URL: <http://mailman2.mcstas.org/pipermail/mcstas-users/attachments/20210614/239c175c/attachment-0003.gif>