Elenna Capote, Dan Brown, Stefan Ballmer

With the interferometer in a completely cold state (no locks, no TCS ring heaters, no CO2, except for the 0,3W of leakeage on CO2 X) we also took a PRC Gouy phase measuremnt. We took 4 measurements. The results from those measurments are (Single-pass Gouy phase):

20.4 +-0.5 deg (systematic)
21.3 +-0.5 deg (systematic)
20.3 +-0.4 deg (systematic)
20.7 +-0.3 deg (systematic)
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20.66+-0.3 deg(systematic) (combined)

Previous PRC Gouy phase measurments:
2022/10/15: 23.23deg +-0.17deg (systematic) alog 52504