See the Trip plot attached. We think the LVEA was unoccupied...did the rack get a glitch?
FAMIS#6497
The "Low Level" error was showing on the crystal chiller and I added 325mL. Everything else looked good.
TITLE: 11/17 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: TJ
SHIFT SUMMARY: Relocking as my shift started. Made it to NLN with no issues.
LOG:
8:32 Changed phase of PI mode 28 damping from -250 to 250.
8:36 Changed phase of PI mode 27 damping from 150 to 120.
8:45 Observing.
8:46 Accepted SDF diffs in MC2, PR2, ETMx, and ETMy Observe files per Betsy's request. See screenshots of diffs prior to acceptance.
8:50 Out of Observing to run a2l.
8:55 Observing.
9:50 GRB alert.
11:07 Out of Observing to run measurement for Sheila.
11:37 Lockloss. Didn't abort Sheila's measurement soon enough. Saved as /ligo/svncommon/lscSVN/iscmodeling/trunk/ALIGOH1/ASC_loops/Measurements/CHARD/2016_11_17_CHARD_P_OLG_SS_50W_low_noise.xml.
12:08 Changed phase of PI mode 28 damping from 250 to -250.
12:13 Changed phase of PI mode 27 damping from 120 to 90.
12:32 Observing.
13:17 Out of Observing to attempt to tweak SRM since the range seems to be diving. Didn't seem to help much (or I didn't go far enough, but didn't want to get too risky).
13:29 Ran a2l.
13:34 Realized I didn't turn off SRC1_P (according to latest instructions, this is what you are supposed to do) while tweaking SRM. Turned off SRC1_P, tweaked SRM to no avail, and turned back on SRC1_P. Turning on SRC1_P caused lockloss. Guess I won't do that again.
13:43 Noticed that during ALS locking, the green Xarm power has come up to above 1 again. Haven't seen that in a while. Curious. See screenshot for proof.
14:25 Observing.
15:15 GRB alert.
Locked at NLN for most of the shift so far. The one lockloss was due to a measurement that Sheila wanted me to run. She warned that it had broken the lock earlier in the day, but she had turned down the amplitude of the excitation so it shouldn't break the lock anymore. Guess she didn't turn down the excitation enough.
Nothing appears out of the ordinary. See attached screenshots. FAMIS 6872.
Travis' measurements are from July and October. I retook the measurements from a time from during one of his locks during the night and the CPS all look fine.
For the operators doing this task, ETMY ST2V2, the pink trace on the top of Travis' 3rd plot, is a bit elevated. That is the kind of issue that we are looking for with this task. Note that on my plot of the same chamber (also my third plot), all of the spectra are back down clustered around the black noise spec.
TITLE: 11/17 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Aligning
INCOMING OPERATOR: Travis
SHIFT SUMMARY:
Shift started with Alignment work, then ASC work.
LOG:
To Do:
Run Sheila's ASC measurement (30min) after we are locked for atleast a couple hours.
Initial Alignment Notes:
INPUT_ALIGN: Xarm IR flashes were up to 0.6, but it wouldn't lock. Tweaked on IM4 & PR2 a bit while looking at Xarm & ASAIR video, but didn't get anywhere. Also doubled & quadrupled XARM gain to no avail. Sheila did some work on filters and quadrupled gain and then this seemed to do the trick.
MICH_DARK_LOCKED: The spot did not look dark (saturated) and look really misaligned. Took it DOWN a few times. Sheila noticed that the exposure was high. After lowering it, had a spot to work with...but it still looked different from previous alignments. Moved on after centering.
SRC_ALIGN: Looked misaligned here. Took it DOWN a few times. Sheila showed me how to fix alignment by misaligning SRM & using SR2 to center the beam on the AS_C Photodetector. This did the trick & then went back to locking.
For the SRC_ALIGN Locking note above, just wanted to mention that ALIGN_IFO was set to DOWN & then SRM MISALIGNED to center SR3.
Tonight we again spent some time on ASC, which was causing us some problems staying locked: SRC1, PRC2 (REFL WFFS), and CHARD.
This all seemed fine, but we just lost lock after trying to transition to the REFL WFS again. For tonight we will leave the gaurdian set up to skip REFL WFS again.
Other things:
This afternoon we had a long stretch of down time mostly spent doing a couple of inital alingments. One thing that didn't go well was locking the XARM in IR, which has been a long standing problem. After Corey got it to lock, I measured the loop and had a look at the filters. I made a new filter called servo and one called boost that I think should be able to replace all the filters that the guardian currently uses (boost should be triggered as the boosts currently are). Next time we do an inital alingment and there is a commissioner around, please try these out, they might make life easier. There is a template to measure the loop in /ligo/home/sheila.dwyer/LSC/XARM_IR
Corey and I were working on accepting things in SDF, and saw something strange that we should look into tomorow. In our lock acquisition that finished around 7:40 UTC on the 17th, in the REDUCE_RF9_MODULATION_DEPTH state, it seems like the guardian skipped the gain increase for ASC-REFL_A_RF9_I1, as shown in the attached screenshot. We manually entered it. Looking at the code, this is hard to explain since this segment is the ninth element in a list, and the gains before and after it in the list were all changed correctly. This didn't happen in last night's lock.
I edited this code today to round off the values that we use so SDF doen't get confused.
for pd in pd9MHzlist:
I've discovered HAM2 ISO_Z and ISO_RZ are well correlated to alignment changes in MC1 pitch and yaw, MC3 yaw, and anticorrelated with PR3 OSEM yaw.
It seems odd that the nm sized ISI ISO signals are showing up in the optic alignments, however this is what I find, and the optic OSEM alignment changes are not small.
I also looked at optical lever signals, and see that HAM2 and PR3 optical levers don't corellate to ISO or OSEM signals long-term. HAM2 oplev does occasionally see a large ISI excursion, and correlates with multiple ISO DOFs.
Plot 1: MC1, MC3, and HAM2 ISI ISO_Z and ISO_RZ, 400 days
Plot 2: PR3 OSEM yaw, oplev yaw, HAM2 oplev yaw, HAM2 ISI ISO_RZ, 400 days
Plots 3 and 4: HAM2 oplev pitch, HAM2 ISO_RZ, ISO_X, 400 days
Summary:
Very interesting Cheryl! A couple things of note and further info:
* There is an integration issue, FRS 5104 regarding the reversal of the HAM 2 & 3 ISI Oplev signals. Doug says he changed the matrix, Suresh says it was the medm, Oreilly says the medm was addressed... still looks like a problem.
* "HAM2 oplev does occasionally see a large ISI excursion, and correlates with multiple ISO DOFs." As soon as I saw these trends, I thought HEPI Pringle loops; I have a WP in to remove the Target Bias Restore for those DOFs, LHO aLog 31025. To date, TJ and I have been unable to understand why these won't go quietly; Jamie is back in country and may solve this. Still. interesting:
I guess I did not even look at the ISI but this restoration of the Target Bias into these AC couple loops literally distorts the HEPI platform until the Offset applied at restoration is easied as the band pass works. I did not imagine that the ISI itself was in turn distorting but that is what is going on: The Pringle loop pulls or squeezes the Crossbeams in turn doing the same to the Support Tubes' relative position, in turn distorting the ISI Stage0. This produces relative position changes at the CPSs and requires the ISO loop of the ISI to react. See attached with the HEPI HP DOF output in the middle. It makes sense that this would require alignment changes of the HAM2 Optics. Further support to raise the lower ugf of these Pringle loops and stop the restoration of the Target Bias.
I'm not surprised that this might be affecting other DOFs too and therefore Pitch as well as the more obvious Yaw. I will redouble my efforts to get these DOFs out of the Restore Bias list.
* Don't have anything to contribute as to the mamy other correlations reported.
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.
A few notes to the calibrations:
Although Jeff and I reduced the appearance of triple bounce and roll modes in DARM by adding notches to the top mass damping for the HSTS (30970), there are still a few modes that show up.
The largest in our last lock was at 28.2 Hz, which belongs to PR3 according to the resonances wiki and Jeff's measurement in 30646. We had no notches for the HSTSs so I have added notches 1 Hz wide centered around 28.2Hz and 44.2 Hz for PR3 and SR3.
The other thing which is large in our spectrum from last night is the remaining 40.9375 Hz mode from PR2. I am not sure why the PR2 mode shows up in DARM larger than the others. I looked at spectra of the osems to see if there is more noise on the PR2 osems. The attached screenshot shows that the top mass osems for PR2 aren't any more noisy than PRM, but there is extra noise in the lower stage osems for PR2, and a large comb. This might be noise in the readback only.
I made the notches in the damping loops 20dB deeper for PR2, we will see if this helps in the next lock.
Last updated Nov 11, 2016
https://lhocds.ligo-wa.caltech.edu/wiki/Violin_Mode_Table_v2
TITLE: 11/17 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Corey
SHIFT SUMMARY: 16hr lock ended a few hours before the end of my shift. Things seemed to be misaligned after and it took me a bit, and with much help, to get it through an initial alignment. Handling off to Corey who may need to do another IA.
LOG:
TITLE: 11/16 EVE Shift: 0:00-08:00 UTC (16:00-0:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
Wind: under 5mph
Primary useism: Not changing much over last 24hrs
Secondary useism: --
QUICK SUMMARY:
TJ is still here and he & Jenne are addressing issue with Initial Alignment (current issue is with SRC Align). This is all after a 16hr lock.
Next up: IM alignment tweak from Cheryl (& then tweak Initial Alignment to address that tweak....so skip Green Arms/ALS & start with INPUT_ALIGN).
Then we'll go back to locking.
Significant exhaust thermal couple response in 19 seconds after changing the as found control valve setting of 16% open to 50% open. Chandra's adjustment to 16% following yesterday's LN2 delivery looks to be an ideal value for the current LN2 column height in the storage tank.
After I left them off for camera glitch investigation (alog31456). Both IX and IY. ETM hws code also restored after hwsmsr restarted. I don't remember having to restart ETMY by hand. Maybe I did but I just forgot that I did.... Or it could be a glitch in the Matrix. I'll keep this in mind for next time.
After a week's worth of struggle with the h1oaf computer, and alignment loop instabilities, we've been blessed with another 16 hour lock stretch. As such, we've got sufficient amount of data for the roaming calibration line to move it from 4001.3 Hz to 4301.3 Hz. Though the line has been at 4001.3 Hz for 5 days, I recommend only using data from the two long lock stretches in that time from Nov 12 2016 05:00:00 UTC to Nov 12 2016 21:00:00 UTC and Nov 16 2016 06:00:00 UTC to Nov 16 2016 22:00:00 UTC. However, note that the mean laser power is different from the one lock stretch to another -- 29.5 [W] for the Nov 12 stretch, and 31.1 [W] for the Nov 16th stretch. 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 4301.3 40k 10:00 39322.0 Nov 16 2016 22:17:29 UTC 4501.3 40k 10:00 4801.3 40k 10:00 5001.3 40k 10:00
Began replacing the Anemometers on the weather stations. Taking longer than anticipated as the stations are not in the same orientation as they were pre roofing. The corner station is done and EndX is complete. I had to rotate the mounting hardware so the Anemometer could point in the proper direction for 0deg. Everything seems to be functioning. This may also explain the complaints about the wind direction being broken in previous posts.
TITLE: 11/16 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing
INCOMING OPERATOR: TJ
SHIFT SUMMARY: Locked at NLN for my entire shift. Darkhan doing some PCal line work for the first half of the shift. Observing for the second half.
LOG:
11:53 Turned off PCal lines. Start Kissel's PCAL2DARM measurement.
Saved as /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/ER10/H1/Measurements/PCAL/2016-11-16_H1_PCAL2DARMTF_4to1200Hz_fasttemplate.xml
12:08 Start Kissel's DARMOLGTF measurement.
Saved as /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/ER10/H1/Measurements/DARMOLGTFs/2016-11-16_H1_DARM_OLGTF_4to1200Hz_fasttemplate.xml
12:28 Turned PCal lines back on.
12:57 Observing.
More details of the IFO conditions during this data set: Mean Input Power: 31.1 [W] SCR1 Loops P&Y Loops ON
