Yesterday I took several beam profiles of the SQZ beam on SQZT7 using the ThorLabs M² device at various settings for the ZM4 and ZM5 psams as we've done in the past to create a "grid" of values. The psam strain gauge values chosen for this set of measurements was:

ZM4 = [-3.5, -1.5, 0.5, 3.0], ZM5 = [-9.3, -7.0, -5.0, -1.3]

Between Sheila, Camilla, and myself, we were able to produce the attached figures comparing these profile results with the OMC scans taken last week (alog92065) to show the predicted mode mismatch between the SQZ beam and the OMC. The results indicate running on the very low end of the psams range with both ZM4 and ZM5 gives the best mode matching into the OMC with the current ZM2 setting.