this sample is t70#1.

Moved zIU to 40.01 mm

Pt = 25.5mW ; Pin = 30.0mW

There is definitely an issue with the holder : the sample is fixed by 2 set screws which can induce a slight tilt of the sample with respect to the input beam.... However there seems to exist a roll angle that compensate this...

Recentered DC with pink tape at bottom towards IU this time.

z scan with 4.81 W : Tue, Apr 2, 2024 10-17-23 AM.txt

z edges at 37 and 77 mm : center at 57mm

map at z_center : Tue, Apr 2, 2024 10-31-32 AM.txt