Taking ALIGN_IFO guardian to INPUT_ALIGN to get X_ARM locked on IR. Start off with a good alignment. ndscope H1:AOS-ETMX_BAFFLEPD_1_NORMALIZED H1:AOS-ETMX_BAFFLEPD_4_NORMALIZED . H1:SUS-PR3_M3_OPLEV_PIT_OUT_DQ H1:SUS-PR3_M3_OPLEV_YAW_OUT_DQ . H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET & save the eventual final scope a template: /ligo/home/jeffrey.kissel/2023-06-06/ PR3OpticalLeverCalibration.yaml Trended back in time and found that during nominal low noise, PD1 is saturated, and PD4 is not. PD4 is a noisy 500 +/- 50 [ct] PD1 is saturated at 833 [ct] Found beckhoff screens for whitening under TcsEndX > Aos > Etmx > Baffle_1 and Baffle_4 Gain +20 dB PR3 starting point: caget H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -117.7 H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 153.5 turn it into a command caput H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -117.7; caput H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 153.5 H1:ASC-X_TR_A_PIT_OUT16 H1:ASC-X_TR_A_YAW_OUT16 H1:ASC-X_TR_B_PIT_OUT16 H1:ASC-X_TR_B_YAW_OUT16 Taking INIT_ALIGN guardian to DOWN This unlocked the IMC. :-( Relocked itself just fine. MISALIGN ITMX using SUS_ITMX guardian Brought PSL power up to 10 W Also opened up BS camera, jacked up exposure to max H1:VID-CAM26_EXP to 10000 Can see *sooooome* light at the upper left corner. Started moving around PR3, and didn't see anything moving ~100-200 urads in pitch and yaw. Went to LHO:9071, found that the transimpedance had been set to 20000. H1:AOS-ETMX_BAFFLEPD_1_TRANSIMPEDANCE (was set at 2000) H1:AOS-ETMX_BAFFLEPD_4_TRANSIMPEDANCE Seems like bechkoff doesn't allow this to be changed. Entered in 20k, and it autoreset back to 2k. Going up to 20W on the PSL. Nothing doing with more blind exploration. So trying more systematic "4 corners" search. Hand-click by counts of 10 PR3 "urad" to +YAW, +PIT "corner", +100 "urad" of PR3 slider on each PIT and YAW. H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -17.7 H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 253.5 Nothing. Hand-click by counts of 10 PR3 "urad" to -YAW, +PIT "corner, subtract 200 in YAW. H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -17.7 H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 53.5 Nothing. Hand-click by counts of 10 PR3 "urad" to -YAW, -PIT "corner", subtract 200 in PIT H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -217.7 H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 53.5 Nothing. Hand-click by counts of 10 PR3 "urad" to +YAW, -PIT "corner", add 200 to YAW H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -217.7 H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 253.5 Nothing. Trying a slow ramp instead, (TRAMP was set a 2.0) caput H1:SUS-PR3_M1_OPTICALIGN_P_TRAMP 20; caput H1:SUS-PR3_M1_OPTICALIGN_Y_TRAMP 20 Reset sliders, caput H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -117.7; caput H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 153.5 +YAW, +PIT "corner" caput H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -17.7; caput H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 253.5; FOUND IT!!! Pitch optical lever reports ~ +5 "urad" Yaw optical lever reports ~ +1.5 "urad" Starting to get there with pitch, via slider clicks. Now trying to aim to the optical lever values. We see lots of light here: ~40 counts on PD4!!. PS, this means there's NO inversion across the ITM. H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -102.5 H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 168.5 Great! Now trying to maximize on each DOF to get the most light (to find the centered on the PD) (in indeed already had started at the 0.1 "urad" level in the "Great!" number above) This appears to be maximum. H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -102.7 H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 168.4 the precision of 0.1 "urad" of PR3 slider. Maximum at this power is 43.3 in the "H1:AOS-ETMX_BAFFLEPD_4_NORMALIZED" Maximum at this power is 0.052 in the "H1:AOS-ETMX_BAFFLEPD_4_POWER" turn this into a command: caput H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -102.7; caput H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 168.4; Optical lever values at this location are PIT 5.12 +/- 0.02 "urad" YAW 1.52 +/- 0.01 "urad tconvert now 1370105118 Jun 06 2023 16:45:00 UTC the delta is PIT (PD4 - center) = ((-102.7) - (-117.78) ) = +15.0 +/- 0.1 slider "urad" YAW (PD4 - center) = (168.4 - 153.5 ) = +14.9 +/- 0.1 slider "urad" Sooooo guess PD1 position is -30 and -30 away from PD4. caput H1:SUS-PR3_M1_OPTICALIGN_P_TRAMP 20; caput H1:SUS-PR3_M1_OPTICALIGN_Y_TRAMP 20 caput H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -132.7; caput H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 138.4; YES! Immediate got *some* light on PD1! Maximize. Speedier ramp time, caput H1:SUS-PR3_M1_OPTICALIGN_P_TRAMP 2; caput H1:SUS-PR3_M1_OPTICALIGN_Y_TRAMP 2 then set slider to 0.1 "urad" increments H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -134.0 H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 137.1 Optical Lever PIT -4.85 +/- 0.01 YAW -5.61 +/- 0.01 power Maximum at this power is 44.2 in the "H1:AOS-ETMX_BAFFLEPD_1_NORMALIZED" Maximum at this power is 0.053 in the "H1:AOS-ETMX_BAFFLEPD_1_POWER" turn this into a command caput H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -134.0; caput H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 137.1; tconvert now 1370106032 Jun 06 2023 17:00:14 UTC Go back to center to record optical lever value. caput H1:SUS-PR3_M1_OPTICALIGN_P_OFFSET -117.7; caput H1:SUS-PR3_M1_OPTICALIGN_Y_OFFSET 153.5 Optical Lever 0.45 +/- 0.01 -1.355 +/- 0.005 1370106365 Jun 06 2023 17:05:47 UTC TO DO: Make sure DAC was not saturating during any of this (don't think it was, but should double check). %%%%%%%%% DONE WITH PR3 SUMMARY: Centered PIT oplev +0.45 slider -117.7 Centered YAW oplev -1.355 slider +153.5 PD1 PIT PD4 PIT Delta(PD1-CENT) Delta(PD4-CENT) Delta(PD4-PD1) (Theo / Delta(PD1-CENT)) (Theo / Delta(PD4-CENT)) (Theo / (PD4 - PD1)) oplev -4.85 +5.12 -5.3 + 4.67 9.97 7.56603774, 7.32334047 7.45235707 slider -134.0 -102.7 -16.3 15. 31.3 2.4601227 2.28 2.37380192 ratio theo -40.1 +34.2 +74.3 PD1 YAW PD4 YAW Delta(PD1-CENT) Delta(PD4-CENT) oplev -5.61 +1.52 -4.255 2.875 7.13 8.7426557 12.93913043 10.43478261 slider +137.1 +168.4 -16.4 14.9 31.3 2.26829268 2.4966443 2.37699681 ratio theo -37.2 +37.2 +74. 4 From LHO:70177 Slider Oplev M3 OSEM Time At [urad] ["urad"] ["urad"] ["urad"] Location Centered PIT 0.0 -117.7 +0.450 -482.992 Jun 06 2023 17:05:47 UTC YAW 0.0 +153.5 -1.355 +171.577 PD1 PIT -40.1 -134.0 -4.85 -493.754 Jun 06 2023 17:00:14 UTC YAW -37.2 +137.1 -5.61 +161.257 PD4 PIT +34.2 -102.7 +5.12 -474.888 Jun 06 2023 16:45:00 UTC YAW +37.2 +168.4 +1.52 +180.750 (PD1 - Cent) PIT -40.1 -16.3 -5.3 -10.762 YAW -37.2 -16.4 -4.255 -10.320 (PD4 - Cent) PIT +34.2 +15.0 +4.67 +8.10 YAW +37.2 +14.9 +2.875 +9.17 (PD4 - PD1) PIT +74.3 +31.3 +9.97 +18.87 YAW +74.4 +31.3 +7.13 +19.493 (PD1 - Cent) [urad/"urad"] PIT 2.4601 7.5660 3.7261 YAW 2.2683 8.7427 3.6047 (PD4 - Cent) [urad/"urad"] PIT 2.2800 7.3233 4.2222 YAW 2.4966 12.9391 4.0567 (PD4 - PD1) [urad/"urad"] PIT 2.3738 7.4524 3.9375 YAW 2.3770 10.4348 3.8168 Slider Calibration [(DAC ct)/"urad"] * ["urad"/urad] = ([DAC ct)/urad] 2.675 * (1/2.3738) = 1.1269 12.272 * (1/2.3770) = 5.1628 Optical Lever Calibration ["urad"/(ADC ct)] * [urad/"urad"] = [urad/(ADC ct)] PIT 26.9 * 7.4524 = 200.47 YAW 29.6 * 10.4348 = 308.87 %%%%%%%%% power back down to 2.0W during transition. bring ITMX back to ALIGNED for transition. Asked TJ to run through initial alignment, from INPUT_ALIGN, but need to do slightly abnormal Y ARM IR because EX end HEPI is down. ALIGN_PRC MICH_BRIGHT ALIGN_SRC (which uses SRY) Going all the way to SRY, then we'll figure out how to get an SRX configuration. while we wait, set up SR3 ndsdope template /ligo/home/jeffrey.kissel/2023-06-06/ SR3OpticalLeverCalibration.yaml Gather up current values for SR3. caget H1:SUS-SR3_M1_OPTICALIGN_P_OFFSET H1:SUS-SR3_M1_OPTICALIGN_Y_OFFSET H1:SUS-SR3_M1_OPTICALIGN_P_OFFSET 437.1 H1:SUS-SR3_M1_OPTICALIGN_Y_OFFSET -149.1 turn this into a command caput H1:SUS-SR3_M1_OPTICALIGN_P_OFFSET 437.1; caput H1:SUS-SR3_M1_OPTICALIGN_Y_OFFSET -149.1 optical lever value z avg -s -30 H1:SUS-SR3_M3_OPLEV_PIT_OUT_DQ H1:SUS-SR3_M3_OPLEV_YAW_OUT_DQ H1:SUS-SR3_M3_OPLEV_PIT_OUT_DQ -0.7487034936745961 0.004029099862255599 H1:SUS-SR3_M3_OPLEV_YAW_OUT_DQ -0.668393474817276 0.0016628566719362463 Checked ETMY BAFFLE_PD settings. +20 dB Not, during SRY, we did see light on Baffle PDs. After ALIGN_IFO was done with SRY alignment. Took ALIGN_IFO IFO to DOWN. MISALIGN ITMY ALIGN_ITMX PSL Power from 10W (where initial alignment left it) to 20 W. Try to get lucky. ramp time to 20 seconds: caput H1:SUS-SR3_M1_OPTICALIGN_P_TRAMP 20; caput H1:SUS-SR3_M1_OPTICALIGN_Y_TRAMP 20 Want to get to +15 PIT -15 YAW caput H1:SUS-SR3_M1_OPTICALIGN_P_OFFSET 455.1; caput H1:SUS-SR3_M1_OPTICALIGN_Y_OFFSET -164.1 No dice. Not lucky. Gunna reset. caput H1:SUS-SR3_M1_OPTICALIGN_P_OFFSET 437.1; caput H1:SUS-SR3_M1_OPTICALIGN_Y_OFFSET -149.1 Start with +PIT, +YAW caput H1:SUS-SR3_M1_OPTICALIGN_P_OFFSET 537.1; caput H1:SUS-SR3_M1_OPTICALIGN_Y_OFFSET -49.1 Nothing, as expected Reset caput H1:SUS-SR3_M1_OPTICALIGN_P_OFFSET 437.1; caput H1:SUS-SR3_M1_OPTICALIGN_Y_OFFSET -149.1 Next -PIT, +YAW, where we expect to see PD1 caput H1:SUS-SR3_M1_OPTICALIGN_P_OFFSET 337.1; caput H1:SUS-SR3_M1_OPTICALIGN_Y_OFFSET -49.1 Nothing. Hrmmm, Reset caput H1:SUS-SR3_M1_OPTICALIGN_P_OFFSET 437.1; caput H1:SUS-SR3_M1_OPTICALIGN_Y_OFFSET -149.1 Next -PIT, -YAW (don't expect to see anything) caput H1:SUS-SR3_M1_OPTICALIGN_P_OFFSET 337.1; caput H1:SUS-SR3_M1_OPTICALIGN_Y_OFFSET -249.1 Nothing. Reset caput H1:SUS-SR3_M1_OPTICALIGN_P_OFFSET 437.1; caput H1:SUS-SR3_M1_OPTICALIGN_Y_OFFSET -149.1 Next +PIT, -YAW, where we expect to see PD4 caput H1:SUS-SR3_M1_OPTICALIGN_P_OFFSET 537.1; caput H1:SUS-SR3_M1_OPTICALIGN_Y_OFFSET -249.1 Nothing. Floundered around for a game plan, since we see no light on the Baffle PDs. "But we see light on the PDs during SRY... ??" ~low ~10s of counts Decided to lock SRX, in hope to gain the power amplification benifit (maybe seeing light with SRY is because we need the power gain of the cavity), and with SRC ASC ON, then our changes in SR3 fill be followed by SRM/SR2, such that the beam stays on target to ITMY #ToBeConfirmed