Reports until 15:46, Friday 15 March 2024
H1 CAL
gabriele.vajente@LIGO.ORG - posted 15:46, Friday 15 March 2024 (76437)
Optical Gains

O4a
Optical gain H_c = 3.340e6 ct/m (from calibration report 2023-10-27)
Kappa_c = 1.007 (from trend, January 16)

Optical gain

H_c * k_c = 3.363e6 cts/m

 Relative 1.012

Before OMC realignment
Optical gain H_c = 3.322e6 ct/m (from calibration report 2024-03-11)
Kappa_C = 1.00 (from trend)

Optical gain

H_c * k_C = 3.322e6 ct/m

 Relative 1.000

After OMC realignment
Optical gain H_c = 3.322e6 ct/m (from calibration report 2024-03-11)

Kappa_C = 1.02 (from trend)

Optical gain

H_c * k_C = 3.388e6 ct/m

 Relative 1.020

After OMC realignment
Optical gain H_c = 3.394e6 ct/m (from calibration report 2024-03-11) in the new DARM configuration

Kappa_c = 0.993 (2024-03-15 15:45 LT) still trending up

Optical gain

H_c * k_C = 3.370e6 ct/m

 Relative 1.015

With this new value of the optical gain, when Kappa_c = 1, the optical gain would be 2.1% higher than before the OMC realignment.