[mcstas-users] McStas isotropic Sqw sample (from the MDANSE perspective)

[FARHI Emmanuel]

Hello Maciej, 

The best is to look at the S_coh(q) for large q, which is expected to converge to 1. 
As far as I can remember, there is such an automatic normalisation mechanism in the Isotropic_Sqw component, so that in practice you may skip any norm step with syntax Isotropic_Sqw(norm=-1), which is the default. 

Emmanuel. 


De: "Maciej Bartkowiak, STFC UKRI" <maciej.bartkowiak at stfc.ac.uk> 
À: "FARHI Emmanuel" <emmanuel.farhi at synchrotron-soleil.fr> 
Envoyé: Vendredi 15 Novembre 2024 09:54:04 
Objet: McStas isotropic Sqw sample (from the MDANSE perspective) 

Dear Emmanuel, 

I am trying to pass the S(Q,w) values from MDANSE to McStas and I would like to know how what input McStas expects. I think that you may be the right person to ask about the isotropic S(Q,w) sample in McStas. 

When I was looking at the documentation, I found information about the units of the q and omega axes, but I am not sure about the unit and normalisation convention for the S(Q,w) values themselves. Where could I find the information? Please let me know if you could point me in the right direction. 

Best regards, 
Maciej Bartkowiak 


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