<div dir="ltr">I saw that component mentioned on the user list before, but Pol_guide_mirror isn't present at the component list at <a href="http://www.mcstas.org/download/components/" target="_blank">http://www.mcstas.org/download/components/</a>. Whilst it is present as a McStas component, the GUI doesn't seem to display properly (attached) so I don't know how to set it up.<div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 14 Jun 2021 at 17:21, Peter Kjær Willendrup <<a href="mailto:pkwi@fysik.dtu.dk" target="_blank">pkwi@fysik.dtu.dk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">



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Hi Andrew,<br>
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<div>On 14 Jun 2021, at 02.22, Andrew Nelson <<a href="mailto:andyfaff@gmail.com" target="_blank">andyfaff@gmail.com</a>> wrote:</div>
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<div dir="ltr">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)</div>
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<div>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. :) </div>
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<div>I will consider making a name-change or an “alias” component to clear this up.</div>
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<div>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?</div>
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<div>How does one make composite optics components?</div>
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<div>The thing is, one does not really… :) </div>
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<div>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. </div>
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<div>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.</div>
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<div>Best and hope this helps,</div>
<div>Peter</div>
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<br>
Peter Kjær Willendrup<br>
Forskningsingeniør, Specialkonsulent<br>
Næstformand for DTU Fysik LSU<br>
<br>
DTU Physics<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr">_____________________________________<br>Dr. Andrew Nelson<br><br><br>_____________________________________</div>