I have not-monitored 2 channels in the OMC SDF Observe.snap file.  These are 2 channels that are written by guardian, and will be different every lock.

The channels are: H1:OMC-PZT2_OFFSET (scanned around to find OMC resonance) and H1:OMC-READOUT_X0_OFFSET (sets the DARM offset to keep OMC DCPDs at 20mA, no matter the PSL power).

J. Kissel, D. Tuyenbayev

Darkhan and I was able to get another round of calibration sweeps in last night, just after Sheila finished up her alignment test (LHO aLOG 31599). This set is at 31.92 W, with SRC1 Loops Closed -- and the second set of data with the anticipated O2 configuration.

Datasets live here: 
Sensing Function:
/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/ER10/H1/Measurements/DARMOLGTFs
2016-11-17_H1_DARM_OLGTF_4to1200Hz_fasttemplate.xml
/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/ER10/H1/Measurements/PCAL
2016-11-17_H1_PCAL2DARMTF_4to1200Hz_fasttemplate.xml

Actuation Functions
2016-11-17_H1SUSETMY_L1_iEXC2DARM.xml
2016-11-17_H1SUSETMY_L1_PCAL2DARM.xml
2016-11-17_H1SUSETMY_L2_iEXC2DARM.xml
2016-11-17_H1SUSETMY_L2_PCAL2DARM.xml
2016-11-17_H1SUSETMY_L3_iEXC2DARM.xml
2016-11-17_H1SUSETMY_L3_PCAL2DARM.xml


I'd found that I'd stored the wrong channels in my new templates for the exploration of the UIM/L1 high frequency actuation on 2016-11-12 (LHO aLOG 31433), so I repeated those measurements as well storing the right channels this time:
2016-11-17_H1SUSETMY_L1_iEXC2DARM_HFDynamicsTest_100-250Hz.xml
2016-11-17_H1SUSETMY_L1_iEXC2DARM_HFDynamicsTest_250-350Hz.xml
2016-11-17_H1SUSETMY_L1_iEXC2DARM_HFDynamicsTest_300-500Hz.xml
2016-11-17_H1SUSETMY_L1_iEXC2DARM_HFDynamicsTest_90-400Hz_SweptSine.xml
2016-11-17_H1SUSETMY_L1_PCAL2DARM_HFDynamicsTest_100-250Hz.xml
2016-11-17_H1SUSETMY_L1_PCAL2DARM_HFDynamicsTest_250-350Hz.xml
2016-11-17_H1SUSETMY_L1_PCAL2DARM_HFDynamicsTest_300-500Hz.xml
2016-11-17_H1SUSETMY_L1_PCAL2DARM_HFDynamicsTest_90-400Hz_SweptSine.xml

Analysis will be posted today (it's finished, we now just need to document it all), and we plan on updating the DARM model and front-end calibration by Monday.

I meant to post this last night, will update soon.

Sheila, Keita, Jenne

A more complete alog will be coming, but this afternoon we once again measured the sensing matrix for refl WFS.  THen we attempted to increase the recycling gain by changing SOFT pitch offsets (not very effective) and using the PR3 spot move (equivalent to change POP A offsets).  We were able to increase the recycling gain from about 30.25 to around 31 by moving PR3 spot position.  As we did this, the jitter peaks changed, with the peaks around 300Hz become better, the 260 Hz peak that we can tune away with IMC DOF1P offsets getting worse, and perhaps the broad lump coming back somewhat.  (I think that we have moved back towards the alignment where the lump was a problem, but will check latter).  

Moving the spot position on PR3 using yaw was more effective at increasing the power recycling gain (we approached 32), and I didn't see a change in the noise while doing this.  

Since the noise was worse after these changes, I took them all out.  If I get a chance latter, I would try moving yaw and not pitch to see if we can get some more recycling gain without making the nosie worse. 

WP 6328

This morning we turned ON filaments of RGAs at EY and corner......from the control room! Gerardo will set the IP address for EX to complete WP. 

I was disappointed to find that we cannot connect to multiple devices at one time to monitor multiple scans in RGA software. Contacted vendor about this. Analog signal monitoring via CDS will help (ECR 1600307).

JeffK & HughR

This is to be ready for changes resulting from the A2L running on a regular basis.  While at it I snapped a view of the TMs L2 Drive Align L2P filter banks.

Whoever is in the chair next when we have to relock (days from now I'm sure...), please:

• Stop at DC Readout. Run a2l. Turn PI Mode 3 & 26 gain to zero. Record time in alog when you put gains to zero.
• Continue up as normal. 
• Once at NLN, run a2l again. Continue to watch PI modes and damp as necessary: if either mode gets above the noise floor in the StripTool, put back in Mode 3 gain = -3000 and/or Mode 26 gain = 3000. Record time in alog when you put gains back on.
• Let the mode(s) damp back down. Once back down and buried in the noise floor of StripTool, set that mode's gain to zero again. Play the same game of seeing if it rings up and putting back in the gain if needed and putting rough times in the alog.

Thanks a bunch - the past few days of everyone helping play this long timescale PI game has been super helpful. 

Many of the gain changes I just accepted into the LSC OBSERVE.snap are showing as differences in the safe.snap.  With conference of JeffK, we are pretty positive these are values changed by Guardian.  So, I am adding these values to the safe.snap Not Monitored list--see attached.  They are ASAIR, POPAIR, POP, REFLAIR, & REFL: A & B, RF18/90/9/45, I & Q gains.  18 total channels.  This makes 125 not monitored channels yet with these additions, there are only 62 differences for all setpoints.

Raised the Heater setpoint from 8ma to 9ma.  We had approximately a 1/2 deg F drop in temperature in the VEA last night.  
Also raised AHU-3 heaters from 3ma to 5ma to turn one stage on.

Beautifully high duty cycle over the past few says. Nice work team! 

Current Schedule Status:
Frequency    Planned Amplitude        Planned Duration      Actual Amplitude    Start Time                 Stop Time                    Achieved Duration
(Hz)         (ct)                     (hh:mm)                   (ct)               (UTC)                    (UTC)                         (hh:mm)
---------------------------------------------------------------------------------------------------------------------------------------------------------
1001.3       35k                      02:00                   39322.0           Nov 11 2016 21:37:50 UTC    Nov 12 2016 03:28:21 UTC      ~several hours @ 25 W
1501.3       35k                      02:00                   39322.0           Oct 24 2016 15:26:57 UTC    Oct 31 2016 15:44:29 UTC      ~week @ 25 W
2001.3       35k                      02:00                   39322.0           Oct 17 2016 21:22:03 UTC    Oct 24 2016 15:26:57 UTC      several days (at both 50W and 25 W)
2501.3       35k                      05:00                   39322.0           Oct 12 2016 03:20:41 UTC    Oct 17 2016 21:22:03 UTC      days     @ 50 W
3001.3       35k                      05:00                   39322.0           Oct 06 2016 18:39:26 UTC    Oct 12 2016 03:20:41 UTC      days     @ 50 W
3501.3       35k                      05:00                   39322.0           Jul 06 2016 18:56:13 UTC    Oct 06 2016 18:39:26 UTC      months   @ 50 W
4001.3       40k                      10:00                   39322.0           Nov 12 2016 03:28:21 UTC    Nov 16 2016 22:17:29 UTC      days     @ 30 W (see LHO aLOG 31546)
4301.3       40k                      10:00                   39322.0           Nov 16 2016 22:17:29 UTC    Nov 18 2016 17:08:49 UTC      days     @ 30 W            
4501.3       40k                      10:00                   39322.0           Nov 18 2016 17:08:49 UTC                
4801.3       40k                      10:00  
5001.3       40k                      10:00

First attachment is the ASC changes accepted.  All the ones accepted are gains that have been rounded off to 4 places rather than 10.  I did miss one matrix value (circled) but I've corrected that in the file directly and reloaded that to the FE.  The 23 remaining differences are filters, offsets and matrix changes requiring more scrutiny.

For the LSC, the same applies.  There is one offset difference remaining--see attached.

Aidan, Terra

A continuation of alog 30522

Previously we'd found that frequency drift over a lock stretch is mode dependent - differential drumhead mode drifts more than that same optic's drumhead mode - but surmised that the ratio of (change of frequency / frequency) between two modes would be constant. However, this assumed a spacially uniform change in temperature --- f_m = g(T) --- when a more realistic assumption is some radial dependence of T, so: 

f_m = g(T(r)), where r is radial vector

Since the energy distribution of a given mode is also dependent on r, we can expect some modally unique self heating response. In other words, the more overlap between a given mechanical mode and the hot spots of the optic, the larger the frequency drift we'd expect that mode to have. 

I've looked at ETMY 15009 Hz diff drumhead mode shift compared with ETMY 8158 Hz drumhead shift during twelve hours of a recent lock. 15009 Hz relative frequency change is larger than drumhead relative change and the ratio begins to level off towards a constant after about six hours. We expect (and model) the opposite - the drumhead mode would have more thermal overlap and thus would shift more. This assumes a mostly centered beam spot (or equivalently, assumes r = 0 at the center of the optic). Looking at Jenne's recent beam spot investigation, ETMY spot position was fairly centered during this time, off in yaw by a few mm. The 15009 Hz mode is differential in pitch. (I still suspect some dependence on torsional vs. longitudinal mode movement as suggested in alog 30522.)

We've started having operators run a2l more regularly and before and after powerup at times to get assurance of beam spot position. 

After getting wack values for PI mode ring ups (many orders of magnitude off from expected) earlier in the week, I've refit ring ups and taken new ones and gotten much more reasonable values (I wasn't looking at long enough time stretches to get accurate ring up data before). Note that we haven't had any instability in Mode3 in many days so I haven't been able to remeasure it. 

Mode 3 hasn't been unstable in many days and Modes 27 & 28 are only unstable during the initial ~ 1-2 hours of transient. Attached are two 30 hour stretches of the damping output of the three modes during recent long locks (Mode3 had no output so I left off) and the simulated HOOM spacing to get an idea of when the modes are ringing up enough to engage damping loops. Left is a few days ago and right is the current lock. Note that Mode26 looks continuously unstable during the 11/16 lock, but it could be that the damping gain is triggering below an actual unstable amplitude; compare to the current lock where we set the gain for Mode26 to zero just after 19:30 (so there would be no damping output) but it has remained stable and low since then with no need to damp. 

Operators and myself are currently turning off gain and measuring ring ups during different times of lock stretches to get gains at different stages of the thermal transient. 

The attached plots show the frequency noise seen by the reference cavity (green), the IMC (red), the REFL port (blue)  and the POP port (brown). The first plot also shows the estimated in-loop suppressed noise in a lighter color as well.

The second plot shows uncalibrated traces but with a 30 kHz bandwidth. The peaks at ~7250 Hz and at ~13.6 kHz are already present in the IMC spectra when the interferometer is unlocked, and, therefore, are not introduced by the REFL servo. The I' channels are the DAQ sensor channels closest to true in-phase signals.