Rick Savage, Dripta

As Rick mentioned in his alog 69213, chi_XY was ~ 1.0013. This should have been close to 1.0 instead since we are already applying correction factors using a previously-measured value of 1.0020. In order to investigate this deviation from 1.0, we have now changed the EPICS variables for the channels H1:CAL-PCALX_XY_COMPARE_CORR_FACT and H1:CAL-PCALY_XY_COMPARE_CORR_FACT from 0.9991 to 1.0 and from 1.0011 to 1.0 respectively. We will measure the chi_XY value without any correction applied over the next long lock stretch.