Laser Status: 
SysStat: Warning “VP program online” is red
Output power is 33.5 W (should be around 30 W)
FRONTEND WATCH is active
HPO WATCH is red

PMC:
It has been locked 5 days, 22 hr , and 54 minutes (should be days/weeks)
Reflected power is 2.0 Watts and PowerSum = 25.7 Watts.
(Reflected Power should be <= 10% of PowerSum)

FSS:
It has been locked for 1 d, 7 h, and 9 min (should be days/weeks)
Threshold on transmitted photo-detector PD = 2.26 V (should be at least 0.9V)

ISS:
The diffracted power is around 9.5% (should be 8-10%) 
Last saturation event was 2 d, 19 h and 0 minutes ago (should be days/weeks


NOTE: The ISS Diffracted Power was out of its range (8-10%) this morning. It was fixed by adjusting the ISS Reference Signal value.

model restarts logged for Sun 12/Oct/2014
2014_10_12 08:44 h1fw0
2014_10_12 18:27 h1fw1
2014_10_12 21:41 h1fw0

all restarts are unexpected

K. Venkateswara

As described by Sheila in 14416, high wind speeds were recorded at LHO on Saturday. BRS shows corresponding high ground tilts during this period.

The first plot shows the ASD of the GND STS, BRS RY and Stage 1 T240 X. There is excellent coherence between the GND seismometer and BRS RY below 60 mHz and the tilt-subtraction looks quite good - you can clearly make out the primary microseismic peak at 55-60 mHz. Also shown is the BRS reference mirror (~sensor noise). After Fridays calibration corrections, the fudge factor I had to use was smaller (0.79) to get the subtraction right.

Stage 1 shows slighlty better coherence with GND_STS and BRS, but it is still limited by some other source of noise below 0.1 Hz.

The second file shows a band-limited BRS RY (5-500 mHz) and wind speeds as measured by PEM anemometers and converted to X and Y directions using the 'direction' data. I might have the axes converted incorrectly, but visually it shows good correlation with the BRS data.

Attendees: Bubba, Ed, Doug, Vern, Jodi, Keita, Jeff B, Jim, Hugh, Richard, Michael, Travis, John, Aaron, etc …

Today's Tasks: 


•	SRM and Lab work – Richard/Aaron, Ed, etc
•	Hugh working on Guardian (Reboots). 
•	3IFO Quad Upper Structure work continues in LVEA – Travis/Betsy
•	Beam tube cleaning will continue today – Bubba and crew 
•	TMS Optical Table assembly (3IFO) in staging building – Jeff B

The attached plot uses GMT on the horizontal axis.  The plot shows 1 - 3 Hz seismic noise last week.  Hanford contractors were hauling typical numbers of rubble loads on day shift and swing shift from Monday 10/6 through Thursday 10/9.  ERDF, the rubble pit, operated on Friday 10/10 but the number of trucks running to ERDF was low during the day on Friday and nearly absent on swing.  Commissioners can expect that the Monday-Thursday noise on this plot will continue through the fall.  Fridays will vary from week to week.  We're trying to learn the Friday haul estimates a day or two in advance.   

The big feature on the plot that shows during the weekend appears to be earthquake-related.

The ISS Diffracted Power was over 12% this morning. It is been adjusted to 9.5 % 

The ISS Diffracted Power was over 12% this morning. Is been adjusted to 9.5 % 

model restarts logged for Fri 10/Oct/2014
2014_10_10 00:22 h1fw1
2014_10_10 07:43 h1fw1

model restarts logged for Sat 11/Oct/2014
2014_10_11 05:33 h1fw1
2014_10_11 21:41 h1fw0

all restarts unexpected.

I'm leaving the interferometer with LSC feedback disabled, the the green lasers trying to lock to the arms.  We are currently having both high winds and high microseism, so anyone who is interested in looking at the motion of our optics or performance of ISIs when the ground motion is high could use this time, starting at 23:39 UTC October 11.

I've left the intent bit as undisturbed, could the first person to come in and commision or work in the LVEA toggle it to commisioning?

Alexa, Kiwamu,

We tried the DRMI tonight with the arm cavities held at a off resonance by ALSs. No exciting result yet.  

(Too high speed in DRMI)

We could lock the DRMI only twice and they did not last for more than a couple of minutes. According to the band-limited RMS plots in the control room, we are having a monontonically increasing micro-seismic tonight, starting 10 hours ago. (Presumably) due to the high seismic, the DRMI fringe tonight is much faster than usual.

(ESD-UIM crossover issue)

Also we experienced an issue in which the ESD-UIM had a bad cross-over. When we closed ALS DIFF, it stayed locked fine for the first 10 minutes or so. But we noticed that the DARM feedabck was slowly developing a 1-ish Hz oscillation which gradually started using up the ESD range. This eventaully caused saturation in either or both of the ESDs and we lost the lock. In order to avoid this issuem. we tried decreasing the ESD LOCK_L gain from 1 to 0.8 on both ETMX and ETMY. This reduced the amplitude of the oscillation and also the in-loop spectrum got back to how it had been. We are concluding that the cross-over between UIM and ESD changed from yesterday.

After adjusting the ESD gain, ALS DIFF reliably stayed locked for a long time, typically order of 20 minutes. Each lock ends usually due to misalignment in ETMX or ETMY.

(ETMX ESD check)

This is just an observation of ETMX ESD.

In the process of checking the ESDs and etc, we checked the reponse of the ESD in the pitch direction by shaking it at 4.1 Hz and looking at it with oplev. We noticed that shaking it in pitch mostly gave us yaw. Shaking yaw gave a good yaw motion though.  We checked ETMY and it was not the case.

(Sheila, Alexa)

Today we worked on the slow/tidal feedback to the ETMs. In doing so, we saw that the L2P for the M0 state was not very good at low frequency. Using the same method as was done for the BS (alog  14022), we found that the gain of ETMX L2P (with FM1, FM2 ON), should be changed from -1.0 to -4.0 at 0.01Hz. So far it appears that this is OK for high frequency. Meanwhile, we found that the gain of ETMY L2P (with FM1,FM2 ON) should be changed from -1 to 22 at 0.01Hz. We are not sure if this is okay at higher frequencies.

The slow/tidal feedback for both arms now works, and no longer causes a drift in the alignment. We made the following the changes to the feedback servo (this is all taken care of in the guardian already):

• ALS-X_ARM_GAIN: 210000 (old: -2100)
• ALS-Y_ARM_GAIN: -210000 (old: -2100)
• End station REFL PDH slow option is always disabled now; the slow feedback is engaged/disengaged by turning off/on ALS-X/Y_ARM input
• ALS-X/Y_ARM: we only have one boost on now

It appears that the DIFF PLL VCO is now in range, but maybe that's a coincidence with ground motion today....

~Two more 5.2mag aftershocks this morning on the Southern East Pacific Rise near Easter Island~ 

08:00 Morning checklist: Reset ALH; vacuum system looks ok - HAM6 cold cathode pressure reporting 10^-7;  CDS/DAQ - everything looks normal.

08:30 Morning meeting

08:42 Krishna to X-End to do some BRS testing/tweaking

09:20 Krishna back from X-End

09:50 Keita to End Y to align green WFS. He will be using ETMY/ITMY/BS/PR3

10:14 Dale into the control room with a tour group

12:04 Jason to End X to align OpLev

12:30 Adjusted ISS Diffracted power to ~9.5% by reducing the refsignal voltage from -2.01 to -2.05

12:37 Jason back from End X

14:45 Sudarshan into LVEA, crawling under HAM2

12:48 Keita back into control room from End Y

12:50 Sudarshan back from crawling

J. Kissel, K. Venkatewara

Jeff K. designed a model to use the GND_Supersensor (tilt-corrected STS) to do sensor correction on Stage 1.

To get the supersensor, we take the GND_STS and add the Tilt signal from BRS converted to velocity units by multiplying g/w. To further correct for the small amount of acceleration present in BRS, we further add a factor of F * V_STS * g/w^2 where F = M * d  /  I  (M=Mass of beam-balance, d = Center of mass offset, I = Moment of Inertia)

Jim and I will try to implement and test this next week when not interefering with commissioning activity.

J. Kissel, K. Venkateswara

We realized we had the wrong factor of 1/2 as described in alog entry 13448.  1/2 [V_sing / V_diff] was not needed/

The filters have been changed to account for the new calibration factor which is:

3.5e-6 [rad/pixel] * 1 [pixels/V_sing] * 1/2 [V_sing / V_diff] * 40/2^16 [V_diff/ct] * 1e9 [nrad/rad] =  2.1362 [nrad/ct]

At ~12:34PT I adjusted the diffracted power in the ISS to ~9.5% as instructed by Rick Savage. The refsignal is currently set to -2.05V.

Jason, Sheila

There have been some glitches on the ETMX oplev, which don't seem to correspond to motion of the optic, the attached screen shot shows an example.  I think that I have seen glitches like this that were much larger in amplitude, but am not sure. 

One question for detchar is if they have a tool that can search for glitches like these, and give us some information about how often they are happening, how large they are, and maybe monitor to see if they are happening on other op levs. 

Another issue is that sometimes the lasers fail, which is often foretold by a several seconds oscillation in the oplev sum.  Can detchar set up some kind of monitoring for that?

Of course the real question is how can we fix it......