On Tuesday, while most of the IFO was down for various maintenance tasks, I grabbed a bunch of SUS spectra and started a Template directory. 

I set all of the references to be the ~quiet, unlocked data from the down period of the IFO.  These spectra could be run when trying to troubleshoot locking.  On Tuesday, I was only able to collect the following, located in /ligo/home/ops/Templates/SUS_Spectra/

BS_NOISEMON_spectra.xml

BS_OSEMINF_spectra.xml      

PR2_NOISEMON_spectra.xml

PR2_OSEMINF_spectra.xml  

PRM_NOISEMON_spectra.xml

PRM_OSEMINF_spectra.xm

SR3_NOISEMON_spectra.xml

SR3_OSEMINF_spectra.xml

SR2_NOISEMON_spectra.xml

SR2_OSEMINF_spectra.xml

SRM_NOISEMON_spectra.xml

SRM_OSEMINF_spectra.xml

ITMX_NOISEMON_spectra.xml

ITMX_OSEMINF_spectra.xml

ITMY_NOISEMON_spectra.xml

ITMY_OSEMINF_spectra.xml
 

NOTE - Many of the lower stage NOISEMON channels look... weird.  They should be used as a before/.after snapshot for troubleshooting only.  Work to improve what the various strangenesses of these channels is on a few low priority to-do lists.

There are templates ready to collect the balance of the SUS spectra data, namely ETMs, MCs, PR3.  We should do this when the IFO is set to DOWN for whatever reason.  The spectra are quick to run, then update all references (currently bogus data) and resave.

21:44UTC

This was ok'd by Mike Landry. He's assisting Robert Schofield with PEM work.

FYI, I have suspended reporting of HWInjReport runs until I can fix the bug that is causing the anomalous absence of RAW and RDS injections.  Once I have that fixed, I will perform a comprehensive run of HWInjReport starting from September 12, 2015 00:00:00 UTC.

Apologies for not giving notice sooner.

We remain in Science mode locked at 72Mpc. Activities are being filtered through Mike Landry via telephone. Kyle and Gerardo have gone to Mid Y to start vacuum pumps for leak hunting. Wind has increased to ≤25mph. Earthquake graph up to .23microns/s. Terramon reported an R-Wave velocity of .25µm from a 5.1 nea New Zealand and then a 5.2 near Chile. This is most likely the reason for the rise. Microseism is up to about .5microns/s. 2.5 hours - glitch free.

The LHO Advanced Ligo CDS web page (https://lhocds.ligo-wa.caltech.edu) has been modified to include screen shots from selected control room wall displays.  Not all displays are included at this time, this is only a preliminary page. The update rate is once per minute.

Click on the link "Control Room Screen Shots" to view.

TITLE: Oct 9 DAY Shift 15:00-23:00UTC (08:00-04:00 PDT), all times posted in UTC

STATE Of H1: Observing

OUTGOING OPERATOR: Travis

QUICK SUMMARY:IFO in Observation mode ~75 Mpc. All lights in LVEA, PSL and M/E stations are off. Wind is ≤10mph with occassional highr gusts. EQ sei plot is nominal. Microseism plot is elevated to ~.35microns/s. Cheryl had the first 2 hours of my shift as planned.

O1 days 18-21

model restarts logged for Thu 08/Oct/2015
2015_10_08 09:29 h1nds1
2015_10_08 12:37 h1asc
2015_10_08 12:47 h1broadcast0
2015_10_08 12:47 h1dc0
2015_10_08 12:47 h1nds0
2015_10_08 12:47 h1nds1
2015_10_08 12:47 h1tw0
2015_10_08 12:47 h1tw1

One unexpected restart of nds1. ASC restart for new model code, with associated DAQ restart.

model restarts logged for Wed 07/Oct/2015

No Restarts Reported.

model restarts logged for Tue 06/Oct/2015

No Restarts Reported

model restarts logged for Mon 05/Oct/2015

Many unexpected restarts of h1tw0 due to raid issues. No other restarts. Due to large size, full report in attached file.

HAM4 and HAM5 have had strong glitches for the past several weeks (sorry if I missed this being reported already, I didn't turn it up in a search, we found these by accident). They are sometimes completely not there, but sometimes happening as fast as twice per second! Attached are a slew of plots taken roughly every two days for H1:ISI-HAM4_BLND_GS13RZ_IN1_DQ (but I also see the same in H1:ISI-HAM5_BLND_GS13RZ_IN1_DQ). 

We don't have a good lead on these, but wanted to report. They look an awful lot like what we have seen before when the HWS camera was on, see e.g., 18531. I noticed a note in the log on August 25 "15:54 Elli – Going to Hartman table at HAM4", and I also noticed that the glitches started showing up after a long hiaitus around August 27th. However, if I have my sign correct (0=off) for the camera switch channels, then the HWS cameras in the central station are currently off in O1 running.  

Assuming it's not HWS, we should probably check ISI actuators for DAC glitches or overflows.

Title: 10/9 Owl Shift 7:00-15:00 UTC (0:00-8:00 PST).  All times in UTC.

State of H1: Observing

Shift Summary: Locked for the entire shift in Observing.  Wind and seismic calm.  Several ETMy saturations, none of which correspond to any RF45 glitching (since there was none that I saw).

Incoming operator: TJ

Activity log: None to speak of.  Very quiet night. 

Locked in Observing Mode for the duration of the shift so far.  A few ETMy saturations, but none of them seemed to coincide with any RF45 glitching, as that has been stable.

TITLE: "10/08 [EVE Shift]: 23:00-07:00UTC (16:00-00:00 PDT), all times posted in UTC"

STATE Of H1: Observing at ~80 Mpc for the past 6 hours

SUPPORT: Jenne, Sheila

SHIFT SUMMARY: Few problems when we began to acquire lock. Smooth ride afterward. Wind speed dropped below 10 mph. No big earthquake. Only one ETMY saturation since we acquired lock. RF45 wan't acting up when the verbal alarm went off.

INCOMING OPERATOR: Travis

ACTIVITY LOG:

23:41 LLO delayed observing for another hour. We take sometimes to do some commissioning work.

0:44 Robert to LVEA to turn off stuff. No injection.

00:38 Locked at NOMINAL LOW NOISE

00:55 Cleared off ASCIMC excitation. Switched to Observing.

05:05 GRB Alert

The new rooftop camera is amazing. I can actually see things at night!

We set all quadrant gains of IMC WFSA to [1 1 1 1] from [1, 0.25, 1, 4]. (WFSB was already all 1.)

We also disabled IMCWFS error offsets in servo filters.

After this, we steered IM2 to bring the beam position on IM4 trans back (at first we tried IM3, but it would make the OSEM output to become larger, and they're already close to saturation).

IFO locked after this without any problem.

We haven't done any jitter coupling optimization and I don't know if Robert had time to do it.

Only one ETMY saturation in 4 hours. Wind speed decreasing together with seismic.

TITLE: 10/8 [EVE Shift]: 23:00-07:00UTC (16:00-00:00 PDT), all times posted in UTC"

STATE Of H1: Observing at ~79 Mpc.

OUTGOING OPERATOR: Ed

QUICK SUMMARY: Sorry been busy. We spent about 1.5 hours at the begining of this shift trying to acquire lock. Had one lockloss and few other minor issues (ISS 2nd loop freaked out, had to find IR by hand). We locked again at NOMINAL LOW NOISE 00:38 UTC but since LLO wasn't Observing we took some time to do extra comissioning. The ifo state switched to Observing at 00:55 UTC. ~15 mph wind, EQ band seismic activity raised accordningly.

After today's Commissioning Day activities, we had quite a few SDF differences to clear out. 

For the ASC, we accepted several things that will be regularly used for the A2L measurements.  These are all channels of the ASC-ADS_ sub-subsystem.  The things we accepted will have no effect on the interferometer, since during observation we don't use this system at all.  We accepted things like the frequencies of the A2L measurements, the ramp times, and the matrix elements.  Note that the "CLKGAIN", which is the acutal oscillator amplitude, is still set to zero in SDF, so if any excitation is happening, it'll be flagged in SDF. 

I also accepted the new IM2 Pit and Yaw offset values, which were set after Keita and Cheryl did their IMC work today.  (Since the IMC pointing moved slightly after their WFS work, they compensated by moving IM2 a bit).  Keita and I also accepted several diffs from the ASCIMC model, that were changed as a result of their WFS work today.

Today I was able to remeasure the frequency noise coupling into DARM. I am not finished analyzing the data, but as a preview I am attaching the TF of the IMC VCO to the DCPD sum above 1 kHz. The coupling appears to go like 1/f, or perhaps slightly faster. A 1/f coupling would be consistent with what was found previously (a flat coupling from REFL9I power to DCPD photocurrent).

I was not able to get coherence between my CARM excitation and the IMC VCO below 1 kHz.

The low-voltage electro-static driver (D1500016) includes monitors of the output quadrant drive signals that are sent to ADCs for sampling/monitoring (in a SUS IO chassis). The monitors look at the drive voltage after the normal inputs, test inputs, and parametric instability correction inputs are summed together. Each monitor path has a 1:4 voltage divider to fit the full driver range into the ADC input range.

Looking at these monitor channels for ETMY from a recent lock stretch shows several problems with these monitors as useful readbacks for the electro-static drive signals. In the attached plot, the two traces are:

• Red: analog monitor channel, in ADC counts (no scaling or filtering applied)
• Magenta: digital signal sent to DAC for ES-drive, scaled and filtered to show how it should appear at the analog monitor channel (filtering is 2 poles at 2.2 Hz, 1 pole at 42 Hz, 2 zeros at 50 Hz)

There are several problems:

1. The sampling rate of the archived monitor channels is too low. It is set to 256 Hz, and the digital AA filter for that rate starts cutting off at about 85 Hz. The sampling rate should be raised to 2048 Hz.
2. The monitor path in the driver chassis includes a low-pass filter at 42 Hz. This is just a mistake in the production of these chassis; the low-pass was intended to be at 1 kHz. This has been corrected by Rich for all the spare driver chassis.
3. More significantly, the monitor channel shows excess noise above 8 Hz or so. Except for some higher amplitude features in the drive (like the calibration lines between 30-40 Hz), the monitor channels are swamped by this excess noise, and are incoherent with the DAC drive. Though not shown, I looked at a time when the interferometer was not locked, so that there was no signal going to the ES-driver: the monitor readback spectrum was at the ADC noise floor of 6e-3 counts/rtHz down to low frequencies (below 10 Hz), so with no signal, the excess noise is not present.

Followup work to do: i) check the behavior of the same channels on L1 for comparison; ii) test the behavior of the monitor channels with a spare unit on the bench, in the presence of a signal