DriptaB, RickS, FranciscoL

On Tuesday, May 7, we changed the following EPICS variables:

H1:CAL-PCALX_XY_COMPARE_CORR_FACT from 0.9979 to 0.9991
H1:CAL-PCALY_XY_COMPARE_CORR_FACT from 1.0013 to 1.0005

Which corresponds to a change of 0.12% for X-End and -0.08% for Y-End in the calibration of the fiduciail displacement factors.

The reason we changed these factors is due to an error in our previous calculation, see alog 77386, which led to a value that was 0.20% off from what we expected.

We will evaluate our changes once the interferometer acquires lock.