The status of the XTD2 attenuators has been checked during the experiment last week and many were found to cause disturbances in the wavefront ranging from mild to severe.

Attachment 1: No attenuator
Attachment 2: 75 um CVD - Fringes visible in beam
Attachment 3: 150 um CVD - Strong fringes in beam
Attachment 4: 300 um CVD - Looks more or less ok
Attachment 5: 600 um CVD - Weak distortion in the beam profile
Attachment 6: 1200 um CVD - Ok
Attachment 7: 2400 um CVD - Ok
Attachment 8: 500 um Si - Not ok