[mcstas-users] Frame overlap mirror creation

[Andrew Nelson]

The different GUI lines may have just become a bit clearer to me, but I'm
still unsure how to set different m for top/bottom/left/right.

On Mon, 14 Jun 2021 at 18:04, Andrew Nelson <andyfaff at gmail.com> wrote:

> I saw that component mentioned on the user list before,
> but Pol_guide_mirror isn't present at the component list at
> http://www.mcstas.org/download/components/. 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.
>
>
>
> On Mon, 14 Jun 2021 at 17:21, Peter Kjær Willendrup <pkwi at fysik.dtu.dk>
> wrote:
>
>> Hi Andrew,
>>
>> On 14 Jun 2021, at 02.22, Andrew Nelson <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
>>
>>
>>
>>
>>
>> Technical University of Denmark
>>
>>
>>
>>
>>
>>
>> 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
>>
>>
>
> --
> _____________________________________
> Dr. Andrew Nelson
>
>
> _____________________________________
>


-- 
_____________________________________
Dr. Andrew Nelson


_____________________________________
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