Vac

• Now in nominal state

SEI

• Jim installing new blend fliters and getting data
• Hugh will take all HEPIs down on TUES for maintenance

SUS

• Quad model change on TUES

CDS

• Work on antennas on roof
• Prep computers for ends that will be changed on TUES

Fac

• Beamtube cleaning and joint sealing on going

Comm

• Still progessing with commissioning work

Weekend Work: Elli and Nutsinee will be coming in to do HWS work

Work safe and have a great weekend!

Sheila, Stefan, Elli, Nic

This afternoon we got a little more time with the IFO.  We redid inital alingment and were able to engage the ASC which increased our recycling gain.  We were able to power up to 15 Watts without a problem, when we increased the power to 23 Watts a 0.4 Hz oscillation that showed up mostly in SRC1 PIT and SRC2 PIT knocked us out of lock.  We've had difficulty in the early part of the evening with ALS, we have the glitches that show up in the arms even when only the arms are locked, reminding us of the glitches seen in alogs 17576 and 15242.  As before, these glitches went away a couple of hours and we are now locking OK again.  

We have reduced the time for the REFL trans ramp from 5 seconds to 1 second, this seems to be fine and we could think about making it shorter or reducing other ramp times in the final stages of CARM offset reduction.  We haven't had the REFL trans lockloss today, but this problem has always been intermittent so we will have to continue locking for several days to see if speeding it up actually helped.  

On June 29, 2015, LHO received a forwarded email from Hanford site personnel which contained this comment:  "Beginning Monday, July 6, there will be an increase in truck traffic . . . near the 300 Area. Waste material will be shipped to the Environmental Restoration Disposal Facility in central Hanford. The remediation effort will continue until the spring of 2016 . . . truck traffic will be present between the hours of 7 a.m. and 3:30 p.m."  The truck traffic mentioned here is the familiar ~30-ton loads in orange containers riding on transport trucks from the Hanford 300 area (~12 miles SE of LHO) to the ERDF pit (~10 miles W of LHO).  One of our site contacts indicates that we can expect about 120 loads per day to ERDF (meaning 2x round trips, but the reverse trip is with an empty container).  At present the hauling contractor anticipates that the loads will move only on the day shift, but these plans could change.  Current daytime PEM-SEIS 1-3Hz plots show this additional traffic. 

1010 hrs. local -> Spun down Y-end turbo and scroll pumps 

1040 hrs. local -> Started pump cart at Y-end RGA and energized RGA filament 

1105 hrs. local -> Spun down X-end turbo and scroll pumps 

1530 hrs. local -> started scan of Y-end 

1545 hrs. local -> Valved-out Y-end NEG 

1600 hrs. local -> Valved-in Y-end NEG 

1615 hrs. local -> Stopped Y-end RGA scan 

16?? hrs. local -> De-energized Y-end turbo levitation 

1655 hrs. local -> De-energized X-end turbo levitation

0829 - Elli to LVEA to turn on Illuminators

0848 - Elli out

0939 - Buba to Mids for fan work

0956 - Kyle to EY to turn on pumop cart

1129 - Bubba back

1144 - Nick to LVEA ISCT1

1145 - Hugh to LVEA to unlock HAM6 HEPI

1146 - Elli, Mike, and students to LVEA for quick tour

1151 - Leo starting charge measurements

1200 - Mike and students out

1210 - Hugh out

1214 - Elli out

1320 - Gerardo to EX to retrieve vac equipment then to MY

1350 - Fil to EX getting length for the new cables to be installed

1509 - Gerardo back

1516 - Kyle to EY for RGA scan

PCAL Laser were turned back on yesterday after the vent recovery at endstations and now the pcal calibration lines are turned on as well.

Sheila, Kiwamu, Chris, Hang

An update of LHO's noise budget is attached ('NB07082015.png'). It used the data from 06/07/2015, at 4:00:00 am UTC, whose predicted BNS inspiral range should be ~60 Mpc according to the summary page. 

Some major updates are: 
1. in SUS/ETMY, updated the ESD driver gain and the TST filter.

2. in LSC Digital, replaced the OMC Front End block.

3. in addition to those already existed 'mystery' gain blocks, some new ones were added. In order to make the NB predicted data match the measured ones (at least at high frequencies) while maintaining each DOF's open loop transfer function consistent with the measurement ('LoopGain07082015.png'), those blocks had to be added before the injection of quantum vacuum noises to have the proper suppression. This seemed indicating that the optickle model was not working perfectly? 

4. A new front end calibration model was built to replace the old OAF.mdl. A comparison between the FE cal and NB was shown in 'FEcheck07082015.png'. In the plot all the blue curves were obtained from the FE Cal and green ones from the NB.

Besides, I also included two plots showing the coupling from MICH (SRCL) to DARM predicted by the NB model, which was generated by measuring TF from MICH (SRCL) control signal (in [ct]) to DARM sensor (in [ct]), then dividing it by the TF from DARM cal (in [m]) to DARM sensor, so the transfer function's unit was [m/ct]. See 'MICH2DARM07082015.png' and 'SRCL2DARM07082015.png'. 

* 07/09/2015: font size increased. Sorry for the previous tiny font size...

After turning the HEPI loops on, noticed the drives to the ISI vertical Actuators are running about 10x higher than usual (compared to the other ISIs.)  Based on the Isolation loops output, these appear to be primarily from the Z dof.  I can't say how much displacement this represents but I'm sure the alignment will be fine if this offset where zero'd.

VE is done with climbing on the chamber and a lock loss provided a window.  No issues unlocking and things look clear but I have not run a range of motion check.  Maybe should be done but I'll think it can wait til Tuesday.

Alignment restored to historic position--that is, the reference/target position is unchanged.

Please mind the signs on the HEPI Housings

I've posted a note in the DCC with some information about our duty cycle durring ER7, and some of the causes of downtime. 

https://dcc.ligo.org/DocDB/0120/T1500368/001/ER7DutyCycleNote.pdf

  I will possibly update this with more information about DRMI locking durring high winds and when it is and is not necessary to wait for bounce and roll modes to ring down in the coming days. 

Sheila, Elli

I moved the ITMs to improve the recycling gain, as well as the PRM.  To get from a recylcing gain of just under 36 to 39 I mostly moved ITMY in yaw.  This may be a different alignment than what we were using durring ER7, but it seems to be an improvement over the alingments we had yesterday, so we have updated references for now.  The green alignment in the X arm did not change, but Elli and I redid the green QPD offsets and camera position for the Y arm.  We lost lock and relocked allowing the ASC to engage with the guardian using these new IR QPD offsets, which was fine and brought us to a recycling gain of 39 again.  For now the many people who want to do things incompatible with full locking have taken over the IFO.  

Old offsets:

  sheila.dwyer@opsws3:~/StripTools$ caget H1:ASC-Y_TR_A_PIT_OFFSET H1:ASC-Y_TR_A_YAW_OFFSET H1:ASC-Y_TR_B_PIT_OFFSET H1:ASC-Y_TR_A_PIT_OFFSET

Elli, Hannah

To create a reference of the ITMX Green for locking.

Using singleImage_checkSaturation.m (/ligo/home/eleanor.king/scattering/singleImage_checkSaturation.m) we took images of the ITMX/Y Green cameras from ER7 ( /ligo/data/camera/archive/2015/06/05 "H1 ITMY Green (h1cam24)_2015-06-05-16-30-58.tiff" and "H1 ITMX Green (h1cam22)_2015-06-05-15-16-43.tiff)

Compared them with pictures taken today. (/ligo/data/camera "ITMY_green_illuminator_H1 ITMY Green (h1cam24)_2015-07-09-16-03-52.tff" and "IMTX_green_illuminator_H1 ITMX Green (h1cam22)_2015-07-09-16-03-43.tiff")

The cameras appear stable. We determined this by looking at the relative position of prominant features of the scattering.

FYI:

The lock-out on the L1 PSL is now released.

All conditions in the original memo have been met. 

The release memo is here: https://dcc.ligo.org/M1500231

Following up this earlier report on pre-ER7 narrow lines in H1 DARM, attached is a corresponding
list of early ER7 lines and some spectra for 30.5 hours of data from May 31 through June 4 at 13:00 UTC, based
on FScans SFTs generated as of Thursday morning. 

Figure 1 shows the 0-2000 Hz spectrum for the early ER7 data with line labels according to the same scheme as before.

Figure 2 shows the mid-May and early ER7 spectra overlain without line label clutter.

Attachment 1 is the early ER7 line list (nearly identical in line frequencies but not strengths to that of mid-May)

Attachment 2 is a zipped tar file of 27 sub-band spectra for early ER7 with lines labeled.

Attachment 3 is a zipped tar file of 27 sub-band spectra comparing mid-May to early ER7 without labels.

I haven't yet digested all of the changes from mid-May to the early ER7A data (what I call ER7A here), but here are things that are immediately apparent::

 Bounce and roll modes are greatly reduced in this ER7 sample
 Quad violin modes are less excited in this ER7 sample 
 The previous comb with a fundamental of 36.9733 Hz (54 harmonics visible) has shifted slightly to a fundamental of 36.9725 Hz (50 harmonics visible). 
 The broad structures seen in the 280-440 Hz band are worse in early ER7 than in mid-May (due to PSL jitter, if I understood Robert correctly)  
 The nefarious OMC alignment dithers and their upconversion have reappeared in what the CW group considers to be an astrophysically interesting band (anything below 2 kHz) at frequencies of 1675.1, 1700.1, 1725.1 and 1750.1 Hz
 Whatever dithers there were previously at 81.0000 and 310.0000 Hz have disappeared.

Attached is a pre-ER7 list of narrow lines seen above 5 Hz in recent H1 DARM data, along with spectra containing labels for the lines.

The spectra used for line-hunting are from 18 hours of DC-readout conditions on May 17. Most of the lines were also seen
in the early-May mini-run data, but are more exposed in the more sensitive May 17 data (see figure 1)

Notable combs / lines:

 Exact integers: 16.0000 Hz, 64.0000 Hz (distinctly louder than other 16-Hz lines), 81.0000 Hz, 1150.0000 Hz, 1672.0000 Hz, 1704.0000 Hz, 1880.0000 Hz, 1896.0000 Hz
 Nearly exact-integer combs: 

 3.9994 Hz (offset by ~2 Hz from zero, first visible harmonic at 13.9977 Hz -- these seem to correlate with a near 4-Hz comb starting at 2 Hz in EX magnetometers (and to a lesser degree in EY magnetometers), where the contamination in DARM at 10 Hz and below is presumably too faint to be seen in the rapidly rising DARM noise. A strong comb is apparent in PEM FScans.
 99.9989 Hz (correlated with magnetometers in EX - see NoEMi and PEM FScans)

 Quad suspension violin modes with fundamentals near 500 Hz are not quite truly harmonic, but some of their upconversion is (see figure 2)
 Especially pervasive combs: 3.9994 Hz (34 harmonics), 16.0000 Hz (124 harmonics), 60.0 Hz (9 harmonics), 64.0000 Hz (31 harmonics), 36.9733 (54 harmonics), 59.9954 (6 harmonics), 99.9989 (13 harmonics)
 There are tentative identifications here of lines near 300 Hz and their harmonics as due to beam splitter violin modes, but their frequencies shifted by several mHz between the mini-run and the May 17 lock stretches, unlike the quad suspension violin modes which hardly moved at all (attributable to temperature?)
 Designated calibration line frequencies are shown on the spectra even when there is no apparent line (some not yet enabled?)

Notes:

 Because the binning in the spectra is 0.5 mHz (based on 30-minute FScan Hann-windowed SFTs), but the line widths in the plots are much larger, the spectra shown here look awful (but aren't). Dewhitening applies five poles at 1 Hz and five zeroes at 100 Hz.
 I didn't bother labeling the forest of bounce/roll-mode sidebands on the quad suspensions and their harmonics
 Although the 1150-Hz line seems well centered on the integer value, its energy is spread over several tenths of a Hz, unlike other integer-Hz lines
 Many line frequencies are give to four digits after the decimal point, but their statistical uncertainties are typically no better than a few tenths of a mHz, and based on changes between early and mid May, some lines have systematic drifts of O(mHz).
 With one exception, the quad violin mode fundamental frequencies were determined from the mini-run data, where they were more excited than on May 17. Those frequencies agree (independently) to within 2 mHz (in most cases, to better than 1 mHz) with the frequencies measured for individual test masses here. The one exception was that I had originally marked 504.1492 Hz as a mode in the mini-run, while the earlier study had found a mode instead at 501.254 Hz. Since the earlier measurements are guided by test-stand data, I am deferring to them and tagging 501.2544 Hz here, since I do see a line there in the mini-run data, albeit weaker than other modes.


Key to spectra labels:

b = Bounce modes
r = Roll modes
C = Calibration lines
L = Lock-in oscillator
M = Power Mains comb
N = Near to power mains comb
S = 64 Hz comb
s = 16 Hz comb
F = Near to 4 Hz (3.9994 Hz) comb
H = Near to 100 Hz (99.9989 Hz) comb
D =  59.3155 Hz comb
E = 36.9733 Hz comb
G = 75.23 Hz comb
Q = Quad violin modes
B = Beam splitter violin modes
x = Miscellaneous singlets

Figures:
1 - Superposition of 0-2000 Hz spectra for minirun (29.5 hours) and May 17 data (18 hours)
2 - Quad violin mode regions for first three harmonics (actual modes are non-harmonic, but some upconversion of fundamental is propagation harmonically)
3 - May 17 spectrum with labeled lines

Other attachments:
1 - Ascii list of narrow lines / combs found in 0-2000 Hz
2 - zipped tar file of 27 sub-band spectra (mostly 100-Hz wide)