We've been stably locked with a recycling gain of 38 at 23.3 Watts for almost 2 hours (I intentionally broke the lock). There were some of the slow (20 second) oscillations that cause some of our locklosses durring ER7.
When I first came in I had some trouble with locklosses durring ENGAGE_ASC. One problem was just a typo, the other one seems to be when the gain is increased for the SRC2 loop. I think this caused the increase in POP90 we were seeing last night, which went away. This morning it kept increasing until the lockl dropped. I moved the transmon QPD offsets back to the pre-vent offsets, powered up to 18 Watts, turned off the ITM loops and adjusted the ITMY alingments slightly to get a decent recycling gain. The green alignment in the arm was OK here, and the camera positions not off by more than 4 counts so I did not update the references.
The offsets where we are stable with recycling gain of 38 and 23.3 Watts are:
H1:ASC-X_TR_A_PIT_OFFSET 0
H1:ASC-X_TR_B_PIT_OFFSET -0.11
H1:ASC-Y_TR_A_PIT_OFFSET -0.128
H1:ASC-Y_TR_B_PIT_OFFSET -0.516
H1:ASC-X_TR_A_YAW_OFFSET -0.095
H1:ASC-X_TR_B_YAW_OFFSET -0.067
H1:ASC-Y_TR_A_YAW_OFFSET -0.174
H1:ASC-Y_TR_B_YAW_OFFSET -0.1
The pre-vent offsets are:
H1:ASC-X_TR_A_PIT_OFFSET -0.029
H1:ASC-X_TR_B_PIT_OFFSET -0.158
H1:ASC-Y_TR_A_PIT_OFFSET 0.101
H1:ASC-Y_TR_B_PIT_OFFSET -0.056
H1:ASC-X_TR_A_YAW_OFFSET -0.007
H1:ASC-X_TR_B_YAW_OFFSET 0.105
H1:ASC-Y_TR_A_YAW_OFFSET -0.127
H1:ASC-Y_TR_B_YAW_OFFSET 0.055
The "post-vent, not stable" offsets are:
caput H1:ASC-X_TR_A_PIT_OFFSET -0.048
H1:ASC-X_TR_B_PIT_OFFSET -0.148
H1:ASC-Y_TR_A_PIT_OFFSET -0.118
H1:ASC-Y_TR_B_PIT_OFFSET -0.369
H1:ASC-X_TR_A_YAW_OFFSET -0.004
H1:ASC-X_TR_B_YAW_OFFSET 0.078
H1:ASC-Y_TR_A_YAW_OFFSET -0.242
H1:ASC-Y_TR_B_YAW_OFFSET -0.318
The new camera positions are (I did not update these since they are not verry different from the old ones):
H1:ALS-X_CAM_ITM_PIT_POS H1:ALS-X_CAM_ITM_YAW_POS H1:ALS-Y_CAM_ITM_PIT_POS H1:ALS-Y_CAM_ITM_YAW_POS
254.325
336.287
300.563
434.418
H1:ALS-X_CAM_ITM_PIT_POS H1:ALS-X_CAM_ITM_YAW_POS H1:ALS-Y_CAM_ITM_PIT_POS H1:ALS-Y_CAM_ITM_YAW_POS
254.325
336.287
300.563
434.418
H1:ASC-X_TR_B_PIT_OFFSET -0.11
H1:ASC-Y_TR_A_PIT_OFFSET -0.128
H1:ASC-Y_TR_B_PIT_OFFSET -0.516
H1:ASC-X_TR_A_PIT_OFFSET 0
H1:ASC-X_TR_B_PIT_OFFSET -0.11
H1:ASC-Y_TR_A_PIT_OFFSET -0.128
H1:ASC-Y_TR_B_PIT_OFFSET -
H1:ASC-X_TR_A_PIT_OFFSET 0
H1:ASC-X_TR_B_PIT_OFFSET -0.11
H1:ASC-Y_TR_A_PIT_OFFSET -0.128
H1:ASC-Y_TR_B_PIT_OFFSET -0.516
