[M. Todd, C. Compton]

Camilla and I made several knife edge measurements of the L5 CO2 laser in the optics lab after she got back from her trip to Access. The beamwidth estimates are consistent with tests done by Gabriele and Camilla

Measurements:

1.  20250327 - razorblade 16cm from laser aperature
2.  20250328 - razorblade 16cm from laser aperature (moved laterally to have more range)
3.  20250328v2 - razorblade 16cm from laser aperature

Results:

Fits to both the numerical derivative and cumulative yield similar estimates of the beamwidth (1/e^2 radius) : around 1.3mm at 16cm from the aperature is consistent with the beam profiles done in Gabriele and Camilla's test, which estimated the beam waist to be around 1.2mm.