[mcstas-users] curved guide

[Andrew Jackson]

Hi Peter

We (Richard Heenan and I) have a component that we use for the LoKI benders (attached) which was a modification of the Pol_bender component to allow us to have it bending downwards/upwards and still have functional gravity. This allows for different reflectivities and is truly curved as well as giving a curved representation in the model. 

You can find our LoKI model on bitbucket (link below) if you want to see how we use it.

https://bitbucket.org/essloki/loki-mcstas-master/src/master/

Cheers
Andrew
______________________________________
Andrew Jackson
Neutron Instruments Division
European Spallation Source, Box 176, SE-221 00 Lund, Sweden           
 
Phone: +46 72 179 2015

On 2019-07-18, 13:28, "mcstas-users on behalf of Peter Link" <mcstas-users-bounces at mcstas.org on behalf of Peter.Link at frm2.tum.de> wrote:

    Dear friends,
    
    just to avoid some double developpment: to my knowlegde there are the 
    following components or ways to simulate a standard curved neutron guide:
    
    Bender; allows for different reflectivities on top/bottom inside 
    outside; can have multiple channels; but behaves geometrically as 
    straight guide element (mcdisplay, coordinates of subsequent elements)
    
    Guide_curved; only one reflectivity definition for all sides, 
    geometrically correct definition
    
    polygon of Guide_gravity elements; allows for a polygonal approximation 
    only, has numerous options
    
    Having a number of truly curved guides in my simulations I would prefer 
    to have a component, which has the possibilities as it has Bender or 
    Guide_gravity but is a geomentrical correct implementation of truly 
    curved guide. If someone has done this or can tell me where I have 
    overseen it, I would be grateful.
    
    Bets regards
    
    Peter
    
    
    -- 
    Dr. Peter Link
    Leiter Neutronenoptik
    Technische Universität München
    Heinz Maier-Leibnitz Zentrum (MLZ)
    
    Lichtenbergstr. 1
    85747 Garching
    
    Tel.: +49 (0)89 289 14622
    Fax: +49 (0) 89 289 11694
    
    _______________________________________________
    mcstas-users mailing list
    mcstas-users at mcstas.org
    https://mailman2.mcstas.org/mailman/listinfo/mcstas-users
    

-------------- next part --------------
A non-text attachment was scrubbed...
Name: Vertical_Bender.comp
Type: application/octet-stream
Size: 22600 bytes
Desc: Vertical_Bender.comp
URL: <http://mailman2.mcstas.org/pipermail/mcstas-users/attachments/20190719/bcf20c53/attachment-0001.obj>