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Optics

The chosen optical layout aims at delivering high photon flux on the sample. By combining a vertically collimating mirror and a horizontally focusing toroidal mirror with a 2:1 demagnification, the optical arrangement partially compensates for aberrations introduced by individual optical elements such that a small focused spot of high quality is achieved. The position along the optical axis of key components are:

   
Centre of ID U21
   0    m
Fast Gate Valve separating Optics hutch and Front End
 17.5 m
Double crystal monochromator; Si(111)
 22    m
Vertically collimating mirror; Rh on single crystal Si
 25   m
Horizontally focusing toroidal mirror, Rh on single crystal Si
 27    m
Focal plane
 40.5    m
 
Optics.jpg      

 

 

 


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