Author: Huang, M.-J.
Paper Title Page
THPPP025
 Commissioning of the Intermediate Focus Setup at P04 at DESY  
 
  • F. Scholz, M. Hoesch, M.-J. Huang
    DESY, Hamburg, Germany
  • J. Buck, M. Kalläne
    CAU, Kiel, Germany
  • B. Pfau, M. Schneider
    MBI, Berlin, Germany
  
  The soft x-ray beam­line P04 at PETRA III in­cludes an ex­per­i­ment and beam-di­ag­nos­tic sta­tion called In­ter­me­di­ate Focus (IF). The sta­tion holds an ex­per­i­men­tal sta­tion for soft x-ray scat­ter­ing, as well as di­ag­nos­tic and beam shap­ing equip­ment to prop­a­gate the beam fur­ther into the AS­PHERE III setup of the Uni­ver­sity of Kiel (CAU). The IF sta­tion re­ceives the beam over a pair of Kirk­patrick-Baez (KB) mir­rors that pro­duce 40 µm x 40 µm beam spot at the IF po­si­tion. An ad­di­tional set of KB mir­rors in­side the AS­PHERE III in­stru­ment re­fo­cuses this spot into the ul­ti­mate focus. Among the beam shap­ing equip­ment, a set of in­ter­change­able pin­hole serve as a new source point. With a size be­tween 5-100 µm they will pro­duce a sub-mi­cron beam size, which is less than 1 µm x 1 µm at the sam­ple po­si­tion. The IF sta­tion in­cludes two fea­tures that will be pre­sented: (a) A UHV switch­yard that al­lows to bring ei­ther the scat­ter­ing in­stru­ment or the beam shaper into the beam (col­lab­o­ra­tion with Max-Born-In­sti­tute Berlin). The switch be­tween the se­tups works with­out break­ing the vac­uum. (b) The beam di­ag­nos­tic and shap­ing as­sem­bly, in­clud­ing mea­sure­ment and view­ing com­po­nents.  
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