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SSA calibration:   
5.770mm to 5.615mm or 155um stage travel, 310um delay. 2.63ms delay.   
   
New calibration: 310um on stage corresponds to 2.63ms. 310um path difference is 1033fs so calibration
 is 1033 fs /  2.63ms= 392.9 fs/ms.

At grating seperation at 26.2 
Pulse length on scope = 172 us FWHM     
Pulse length (real) = 0.172 ms X 392.9 fs/ms / 1.5 = 45.1 fs FWHM 

Image Added

Measurement 11/8/2023

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