Today, we did the beam profiling for the beatnote detector just before the photodiode. I have attached the data taken. The z values mentioned are from a point which is 2.1 inch away from a marked line on the stage.

However, the analysis concludes that either the beam radius changes too slowly to be profiled properly with given method of measurement or something else is wrong. Attaching the the z vs w(z) plot from this data and few fit plots.

Ref Z: 2.1 inch,,,
Z-position (mils),Edge X Value (mils),Reading (mV),
-500,175,11,11
-500,180,11,11
-500,185,12,12
-500,190,15,16
-500,195,22,25
-500,200,39,42
-500,205,67,70
-500,210,99,105