Several more lock losses. CARM ON TR problem, believed to be solved by increasing CARM OFFset for -0.8 to -1.2. 12 minutes of lost time because FSS went bonkers after a lock loss. tried calling Peter and Jason, no reply. Tried turning off autolocker for a bit, no success. Started loosing lock at SHUTTER_ALS, #PATTERN4 but turns out it was really DHARD_WFS turning on, and just taking he amount of time between DHARD_WFS and SHUTTER_ALS to pull things into the weeds. Unclear as to why this is suddenly an issue. Problem appears to be a large error signal in DHARD P. Solved by manually walking the arm to reduce the error signal. userapps/asc/h1/scripts/move_ARM_dev.py DH PIT -0.03 (diff)(hard) in yaw (step size in slider microrad units) worked. Moved up through PREP_ASC_FOR_FULL_IFO. Manually walked through the first half of ENGAGE_ASC_FOR_FULL_IFO $> guardian -i ISC_LOCK copy and paste from "" # Turns on DRMI ASC and CHARD (so, ... ezca.get_LIGOFilter('ASC-SRC2_Y').ramp_gain(100, ramp_time=5, wait=False)# this is set to 100 here then reduced in engage soft loops, is that necessary? SED Jan 23 2019 "" i.e. just before ADS signals are turned on. 21:01 UTC Success. Now looking at ADS error signals,they are large -- at the 10-14 counts. Now "manually" walking with sliders PRM YAW -- successful. -1518.6 PRM PIT -- trying to increase POP18 and PRC buildups, as well as descrease the ADS3 error signals (which is PRM). No change in ADS signals, but power buildups got better. Try using ADS YAW 4, which is X SOFT userapps/asc/h1/scripts/move_ARM_dev.py XS YAW -0.03 POP18 getting better, ADS4 YAW error signal getting better but on a very slow time-scale (1 to 3 minutes). tried a coupled of steps at a bigger step size. 21:10 UTC Good time to restore to if we lose lock. Success, after walking PIT and YAW of ADS4, ADS4 error signals are within ~+/-1 ADS5 Yarm Soft. userapps/asc/h1/scripts/move_ARM_dev.py YS PIT +0.1 Bringing in ADS4 PIT and ADS5 at the same time. 21:46:30 UTC Progress save point for "WFS RELIEVE PAST" Jenne begins moving TMSX to try to center beam on Green and Red QPDs. Signs of success. Impatiences makes us try parallelizing. Works. 22:00 UTC Niko / Jeff working on ADS error signal reduction. Jenne / Kara working on TMSX spot centering. << As this is happening, this is updating the initial alignment references. 22:16:30 Progress save point. 22:32:15 Progress save point. ADS 3 (PRM) PIT is still way off and unresponsive. Happy with TMSX and TMSY for now. Now gunna try to engage the rest of ENGAGE_ASC_FOR_FULL_IFO, but manual turn off ADS3 PIT. 22:34:06 ENGAGE_ASC_FOR_FULL_IFO Holding steady there, while Kara/Jenne continue to adjust / update initial alignment references, 22:53:00 UTC Save point. All initial alignment references updated. 22:53:21 ENGAGE_SOFT_LOOPS. Cheat on ADS and increase gain on ADS5 PIT from 1.0 to 3.0 Tried moving PRM PIT sliders, but ADS3 PIT error signal is getting worse, as is power recycling gain. Hold. Discuss path forward.... Still can't get much further, because ADS3 PIT (PRM) error signal is still off in the weeds. Don't *want* to go further, because we can't stay long in DCreadout, and want to update initial alignment references once there. 22:07:00 UTC Save point. Start to move PRM again, but in the opposite direction. Sort of works, but DHARD PIT gets angry (starts saturating QUADs) when we we move too fast. Begin to wonder "are we on the other side of the ITMY point absorber?" Pause to check spot positons. Actually "do the opposite" and move spot positions (change A2L gains) to see if ADS oscillator lines decrease in amplitude in DELTAL_EXTERNAL. They do. Continue changing A2L gain on ITMY to move spot position. ADS3 PRM PIT error signal getting better. Turning on ADS3 PIT. Lost YARM green lock. Adjusting ITMX and ETMX spot positions. Basically now we're finding new good spot positions. But we don't want to do this at 2W. Trying to toggle Y PDH on and off by flipping the polarity on INPUT1 H1:ALS-Y_REFL_SERVO_IN1POL No success. OK. Jenne has to leave. 3 paths forward: (1) Try increase power. (2) Revert initial alignment settings and sliders to last save point. 2019-07-31 22:07:00 UTC, 1248646038 PIT YAW Camera Y = 239.3, 210.7 QPD Y A = -0.4 , 0.76 QPD Y B = 0.82, 0.01 ITMY A2L = -3.0 0.0 Camera X = 235.82, 332.9 QPD X A = -0.144 , 0.571 QPD X B = 0.709, -0.073 ITMX A2L = -3.965, 0.055 (3) Revert initial alignment settings and sliders to this morning. 2019-07-31 15:55:06 UTC, 1248623724 Go back to last save point after lock loss. -- Green QPD Offsets -- ALS X Overview > under bullseye graphs for QPD OFFSET. -- Green cameras, (both arms) > -- slider values by doing /opt/rtcds/userapps/release/asc/h1/scripts$ wfsreliefpast.py TMSY sliders are different in the new initial alignment era. If ADS3 PIT error signal still to large, and get no action out of PRM, then move ITMY P2L gain. Tried option (1) at 23:36:27 UTC. Failed, because violin modes we saturating the DCPDs. (We didn't notice, but these were high already. Just wasn't paying attention to violin modes. Dang it!) ETMY MODE 1 and 6. Likely problematic because the spots are in a different position, which changes the relationship between the mode and DARM, which changes the phase of the damping loop plant, and thus the same settings are bad and ring it up. Also -- this mode group is known to be problematic because they're so close together in frequency. Started along the "normal" path, but Y ARM would not lck with noodling. Spent some time gathering the above data about initial alignment settings. Going forward with option (2) for starters. Patrick restores initial alignment settings to above and we run wfsrelievepast: /opt/rtcds/userapps/release/asc/h1/scripts$ ./wfsreliefpast.py 1248646038 H1:SUS-ETMX_M0_OPTICALIGN_P_OFFSET => 63.2852 H1:SUS-ETMX_M0_OPTICALIGN_Y_OFFSET => -136.413 ETMX P: 63.2852 Y: -136.413 (old P: 63.7155 Y: -136.4693 ) H1:SUS-ETMY_M0_OPTICALIGN_P_OFFSET => 97.4238 H1:SUS-ETMY_M0_OPTICALIGN_Y_OFFSET => -130.428 ETMY P: 97.4238 Y: -130.428 (old P: 98.6635 Y: -131.8262 ) H1:SUS-ITMX_M0_OPTICALIGN_P_OFFSET => -153.471 H1:SUS-ITMX_M0_OPTICALIGN_Y_OFFSET => 107.541 ITMX P: -153.471 Y: 107.541 (old P: -153.0913 Y: 107.4993 ) H1:SUS-ITMY_M0_OPTICALIGN_P_OFFSET => 29.6902 H1:SUS-ITMY_M0_OPTICALIGN_Y_OFFSET => -165.553 ITMY P: 29.6902 Y: -165.553 (old P: 31.1012 Y: -165.4671 ) H1:SUS-BS_M1_OPTICALIGN_P_OFFSET => 189.782 H1:SUS-BS_M1_OPTICALIGN_Y_OFFSET => -332.589 BS P: 189.782 Y: -332.589 (old P: 188.6701 Y: -331.9163 ) H1:SUS-PRM_M1_OPTICALIGN_P_OFFSET => -1506.5 H1:SUS-PRM_M1_OPTICALIGN_Y_OFFSET => 394.499 PRM P: -1506.5 Y: 394.499 (old P: -1453.8046 Y: 394.4992 ) H1:SUS-PR2_M1_OPTICALIGN_P_OFFSET => 1558.65 H1:SUS-PR2_M1_OPTICALIGN_Y_OFFSET => 3260.48 PR2 P: 1558.65 Y: 3260.48 (old P: 1558.9005 Y: 3259.8903 ) H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET => -119.2 H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET => 150.7 PR3 P: -119.2 Y: 150.7 (old P: -119.2 Y: 150.7 ) H1:SUS-IM4_M1_OPTICALIGN_P_OFFSET => 3372.62 H1:SUS-IM4_M1_OPTICALIGN_Y_OFFSET => 1301.35 IM4 P: 3372.62 Y: 1301.35 (old P: 3563.0816 Y: 1505.5971 ) H1:SUS-SRM_M1_OPTICALIGN_P_OFFSET => 1682.51 H1:SUS-SRM_M1_OPTICALIGN_Y_OFFSET => -3272.19 SRM P: 1682.51 Y: -3272.19 (old P: 1667.3341 Y: -3259.6535 ) H1:SUS-SR2_M1_OPTICALIGN_P_OFFSET => 967.105 H1:SUS-SR2_M1_OPTICALIGN_Y_OFFSET => 257.62 SR2 P: 967.105 Y: 257.62 (old P: 966.465 Y: 259.1694 ) H1:SUS-SR3_M1_OPTICALIGN_Y_OFFSET => -151.9 SR3 P: 438.4 Y: -151.9 (old P: 438.399993896 Y: -151.899993896 ) H1:SUS-TMSX_M1_OPTICALIGN_P_OFFSET => -95.2679 H1:SUS-TMSX_M1_OPTICALIGN_Y_OFFSET => -76.0604 TMSX P: -95.2679 Y: -76.0604 (old P: -97.7155 Y: -76.5107 ) H1:SUS-TMSY_M1_OPTICALIGN_P_OFFSET => 77.3046 H1:SUS-TMSY_M1_OPTICALIGN_Y_OFFSET => -289.063 TMSY P: 77.3046 Y: -289.063 (old P: 79.5424 Y: -289.3556 ) 2019-08-01 00:03 UTC Brilliantly quick through early states. of LOCKING_ARMS_GREEN, FIND_IR, super quick DRMI lock, and normal length of time to get to PREP_ASC_FOR_FULL_IFO. Nice! Notice ADS signals are in a different place than before. Realized we forgot to revert the A2L gains to the last save point 2019-08-01 22:07 UTC. Only P2L gains had changed. Slowly begain to revert A2L gains. First ITMX, slowly, incrementing from 2.0 to -3.965 in factors of two steps with 60 sec ramp. (2 > 1, 1 > 0.5, 0.5 > -0.5, -0.5 > -1, -1>-2, -2 > -3.95) Success. ADS signals moved in toward zero. Now ITMY, slowly from +1.7 to -3.0 in similar factors of two, with 60 second ramp. Now ADS signals look as before -- ADS3 ("PRM") PIT is way off. surprisingly, no drop in power buildups or recycling gain as we swept across either optic's spot positions. We have lost the yarm in green though. Gunna try to swing ITMY back through ITMY P2L gain to get good ADS 3 signals, 'cause that's what Jenne said to do. Same steps as above, just in reverse.