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Message ID: 38     Entry time: 28 Feb 2024, 06:57
Author: Peter Zalden 
Group: FXE 
Subject: Issue 

Not sure if this is the cause of the fringes reported before, but at 5.6 keV there are clear cracks visible on the XTD2 Attenuators 75 umm and 150um CVD, see attached. There is also a little bit of damage on the 600 um CVD, but not as strong as the others.

At 5.6 keV we will need to use the thin attenuators. I will mention again in case this causes problems downstream.

Edit 8:50h: We do not observe additional interference effects in the downstream beam profile (see attachement 4)

Attachment 1: 2024-02-28-064435_203161010_exflqr51474.png  451 kB  | Show | Show all
Attachment 2: 2024-02-28-064443_551842636_exflqr51474.png  391 kB  | Show | Show all
Attachment 3: 2024-02-28-064454_671377179_exflqr51474.png  416 kB  | Show | Show all
Attachment 4: 2024-02-28-085524_727294913_exflqr51474.png  101 kB  Uploaded 28 Feb 2024, 08:55  | Show | Show all
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