Author: Seltmann, J.
Paper Title Page
THPPP003 FEM Simulations for a High Heat Load Mirror 274
 
  • J. Seltmann, H. Geraissate, M. Hoesch
    DESY, Hamburg, Germany
  
  At the vari­able po­lar­iza­tion XUV beam­line P04 of PETRA III the first mir­ror is used to switch the beam be­tween the two branches of the beam­line. The heat load on this white beam mir­ror is de­pen­dent on the de­gree of po­lar­iza­tion and the en­ergy of the first har­monic of the syn­chro­tron ra­di­a­tion. For this pro­ject the water cooled "notched" mir­ror ap­proach by Khoun­sary* and Zhang et al.** has been eval­u­ated with FEM sim­u­la­tions. These show promis­ing re­sults for lin­ear hor­i­zon­tal (LH) po­lar­iza­tion in which the heat load pro­file is aligned with the mir­ror length. For lin­ear ver­ti­cal (LV) po­lar­iza­tion the heat load is con­cen­trated in the mir­ror cen­tre, which vi­o­lates the basic con­cept of the "notched" mir­ror de­sign and there­fore the sim­u­la­tion re­sults in­di­cate only poor per­for­mance. To com­pen­sate for this a sec­ondary cool­ing loop has been im­ple­mented and will be shown to im­prove the per­for­mance for the LV case sig­nif­i­cantly. Ad­di­tion­ally, a new de­sign ap­proach is eval­u­ated to re­duce the peak tem­per­a­tures of the mir­ror, which oth­er­wise ranged at 140-180°C.
* Khounsary, A.M., Proc. SPIE 3773, X-Ray Opt. Des., (1999). 10.1117/12.370114
** Zhang, L. et al., J. Phys.: Conf. Ser. 425, 052029 (2013). 10.1088/1742-6596/425/5/052029.
 		 
poster icon Poster THPPP003 [1.369 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP003  
About • Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 28 May 2024
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