[mcstas-users] curved guide

Andrew Jackson andrew.jackson at esss.se
Fri Jul 19 13:10:02 CEST 2019

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.


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
    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

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