camilla.compton@LIGO.ORG - posted 11:50, Friday 08 November 2019 - last comment - 13:02, Friday 08 November 2019(53094)
Results of Sheila's SQZ tests
Following Sheila's SQZ test ALOG
TEST 1
18:13 caput H1:SQZ-SHG_SERVO_IN1GAIN 27 110Mpc (no need to unmonitor as already unmonitored)
18:20 no changes in range. Reverted to H1:SQZ-SHG_SERVO_IN1GAIN 7
TEST 2
18:22 Unmonitered H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG
18.23 H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG 120
Also unmonitor 2 other channels as they are affected by this change: H1:SQZ-CLF_REFL_RF6_PHASE_DELAYNS and H1:SQZ-CLF_REFL_RF6_PHASE_DELAYSTEP
18:34 no changes in range for 120. set H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG 110
18:42 no changes in range for 110 set H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG 100
18:50 range to 116Mpc = improvement
18:53 revert to H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG 110
18:55 Range = 114MPc then back to 116Mpc
19:03 Range 108Mpc
19:10 set H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG 100 to see if we would see range improvement again
19:19 ranged dropped to 107Mpc while in PHASEDEG 100, may coincide with glitch.
19:22 set H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG 120 range straight to 90Mpc (glitch?)
19:33 revert to nominal H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG 110 and set 3 channels back to Monitered.
Will try TEST 3 and repeat TEST 2 if the range drops again as currently 114Mpc
Images attached to this report
Comments related to this report
At 18:23-18:27UTC, H1 was inadvertently brought out of Observing due to some channels that were still monitored that were affected by the phase change experiment. Those channels are noted in the above alog.