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Reports until 17:34, Friday 18 April 2014
H1 SEI
hugh.radkins@LIGO.ORG - posted 17:34, Friday 18 April 2014 (11455)
HEPI TFs Running on WHAM5--opsws0

nm

H1 SEI (INS)
hugh.radkins@LIGO.ORG - posted 16:26, Friday 18 April 2014 - last comment - 16:28, Friday 18 April 2014(11451)
WHAM5 SEI ISI Tuned Mass Dampers Installed

Once IAS finished, Greg & I installed the ISI Blade Spring's TMDs.  SNs 22 23 24 on Springs 1 2 3 respectively.

Comments related to this report
hugh.radkins@LIGO.ORG - 16:28, Friday 18 April 2014 (11452)

Photo of the little fella.

Images attached to this comment
LHO General
gerardo.moreno@LIGO.ORG - posted 16:25, Friday 18 April 2014 (11450)
Ops Summary (second part)

We had a couple of earthquakes today, a 7.2 near Tecpan de Galeana, Mexico, a 5.6 near Noatak, Alaska, and a 5.5 at Balleny Islands region.

- 9:06 am, Andres to the CS VEA, retrieve items.--> done by 10:17 am.
- 10:01 am, Hugh to CS VEA, HAM5 area for HEPI work.
- 10:01 am, Kyle to Y-End station, open GV18--> done by 10:20 am.
- 10:25 am, Jeff K. from the CR, new code per WP#4573.
- 10:30 am, Kyle to CS VEA, open GV7 and GV5.
- 10:40 am, Corey to CS cleaning area, retrieve garb.
- 10:45 am, DAQ restart for new code.
- 1:00 pm, Karen to Y-End, cleaning.
- 1:05 pm, David to CS VEA, TCS work.
- 1:30 pm, Hugh to CS VEA, continue with HAM5 work.
- 1:55 pm, Matt H. to CS VEA, TCS work.
- 2:04 pm, Cyrus to X-End, comtrol check/work. -->done by 2:33 pm.
- 2:09 pm, Jeff K. more code.
- 2:20 pm, DAQ restart.
 

LHO VE
kyle.ryan@LIGO.ORG - posted 16:09, Friday 18 April 2014 (11449)
Leaving PT246B energized and unpumped over the weekend
I ran into a "snag" with the RGA reconfiguration that I had envisioned and won't be able to pump the volume seen by PT246B until next week -> The pumping effect provided by the gauge isn't enough to match the out gassing and the pressure is rising as well as the rate of rise -> If it starts to "run away" I'll have to shut it off but, ideally, it will stay in its safe operating pressure range until I can pump it early next week.
LHO VE
kyle.ryan@LIGO.ORG - posted 15:50, Friday 18 April 2014 (11448)
Gate valve operations
Soft-cycled GV7 so that others could install viewport protector shutters etc -> Dumped unpumped gate annulus volume into pumped annulus volume, opened GV5 -> Dumped GV18's unpumped gate annulus volume into pump cart and decoupled pump cart from annulus plumbing -> Isolated and shut down Turbo and scroll pumps -> opened GV18
H1 SEI (INS)
hugh.radkins@LIGO.ORG - posted 15:14, Friday 18 April 2014 - last comment - 15:38, Friday 18 April 2014(11445)
WHAM5 SEI HEPI IPS channels now on and calibrated. Alignment zero'd.

The input matrices for WHAM5 are populated and calibration filters are loaded.  With the Actuators attached, the IPS and even better, the Cartesian Position Biases are valid.  The IPSs were zeroed immediately after the IAS look this morning.  So, the 'aligned' position is zero on this chamber.  Likely once I do range of motion etc tests, the system will de stress and certainly local numbers will change.  Usually though the cartesian values tend to cancel, we'll see.

Comments related to this report
hugh.radkins@LIGO.ORG - 15:38, Friday 18 April 2014 (11447)

Safe.snap made just now.

H1 SEI (SEI)
hugo.paris@LIGO.ORG - posted 15:03, Friday 18 April 2014 (11441)
SEI Commissioning Hand-off

Recommended controls for the different SEI platforms:

BSC-ISI (All) - Guardian ON
Blend: TBetter on all DOF but RZ
Isolation loops: ISO Lv3
Tilt decoupling: gnd-st1 (Matrix, always ON)

HAM-ISI (HAM2, HAM3) - Guardian ON
Blend: 01_28
Isolation loops: ISO Lv3

HEPI (ETMX, ITMX, BS, ITMY, ETMY, HAM2, HAM3, HAM6*) - Command button
Position loops blend filters: 0 on L4C, 1 on IPS
Isolation: Position Loops (Level 1 in command window)

Note: ground-stage1 sensor correction (SENSCOR) is available on BSC-IY and BSC-EX

Recent Updates:

Seismic SVN:

To do list:

Non-image files attached to this report
H1 DAQ (CDS, SUS)
david.barker@LIGO.ORG - posted 14:51, Friday 18 April 2014 (11443)
DAQ restart, completion of SUS changes
DAQ restarted to support latest SUS restarts
 
2014_04_18 13:25 h1susetmy
2014_04_18 14:21 h1suspr3
2014_04_18 14:21 h1sussr3
2014_04_18 14:37 h1susbs
2014_04_18 14:44 h1dc0
2014_04_18 14:44 h1nds0
2014_04_18 14:46 h1broadcast0
2014_04_18 14:46 h1fw0
2014_04_18 14:46 h1fw1
2014_04_18 14:46 h1nds1
2014_04_18 14:21 h1suspr3
2014_04_18 14:21 h1sussr3
2014_04_18 14:37 h1susbs
2014_04_18 14:44 h1dc0
2014_04_18 14:44 h1nds0
2014_04_18 14:46 h1broadcast0
2014_04_18 14:46 h1fw0
2014_04_18 14:46 h1fw1
2014_04_18 14:46 h1nds1
2014_04_18 14:21 h1suspr3
2014_04_18 14:21 h1sussr3
2014_04_18 14:37 h1susbs
2014_04_18 14:44 h1dc0
2014_04_18 14:44 h1nds0
2014_04_18 14:46 h1broadcast0
2014_04_18 14:46 h1fw0
2014_04_18 14:46 h1fw1
2014_04_18 14:46 h1nds1
H1 ISC
alexan.staley@LIGO.ORG - posted 14:18, Friday 18 April 2014 (11440)
EY PLL Measumrents.

I have started to repeat the same noise measurements we made during HIFOY, in particular for the PLL loop (see alogs 9846 and 9251). So far I have made the following PLL measurements:

EY PLL OLTF: see alog 11180. The UGF is at 23kHz with a phase margin of 52 deg.

Beanote measurement: I measured the beatnote out of the direct monitor (-1dBm) of the pre-amplifier. Using the Agiliant spectrum anylzer, the signal strength was -20dBm at 39.62MHz with 100Hz BW. Notably, the medm screen reads back -5dBm which is after the +13dBm. The PLL BBPD DC readback was 2V with 17.8mW. I adjusted the calibration to 0.055A/W (different from at EX).

AG spectrum analyzer noise floor: I measured the noise floor of the spectrum analyzer to be at -122dBm at 100Hz BW.

BBPD dark noise: With the PD completely blocked, the noise was at -116dBm at 100Hz BW.

Shot noise: With only the fiber light blocked at the PD, the noise was at -108dBm at 100Hz BW.

PLL error signal: With the loop locked, I measured the error signal at the IMON of the PFD (i.e. this is a suppressed error signal). I have attached the data; measurements were taken with both the SR785 (EY_PLL_NoiseSpecV_Raw) and with the AG spectrum anaylzer (BBB2.txt) for high frequencies. I have also attached the concatenated data.

Non-image files attached to this report
H1 CDS
james.batch@LIGO.ORG - posted 11:53, Friday 18 April 2014 (11439)
Restored default mapping of keys on control room keyboards
Once again, I've had to restore the mapping of keys on the control room keyboards for the controls account so that the caps lock key works.

PLEASE DON'T CHANGE THE KEYBOARD SETTINGS!  IT CHANGES IT FOR EVERYBODY, NOT JUST YOURS!

H1 AOS (SEI)
jason.oberling@LIGO.ORG - posted 11:18, Friday 18 April 2014 (11436)
HAM5 ISI Alignment
IAS: J. Oberling
SEI: H. Radkins, G. Grabeel
 
Measured the HAM5 ISI X and Y position and yaw alignment this morning after the HEPI actuators were installed.  We are centering the ISI to the HAM5 chamber.  Based on measurements taken 8-30-2013, the HAM5 chamber is at -8.1mm X-axis and +5.5mm Y-axis from it's desired position, so this is what we are targeting for the ISI X and Y positions.

Since the HEPI actuators are already attached (making adjustment difficult) and the yaw tolerance of the SR3 and SRM optics is large and adjusted on the table (unlike the BSC chambers we do not adjust HEPI to align the optics, we push them on the already aligned ISI) we will ask for a waiver on the ISI yaw.

H1 SEI
hugo.paris@LIGO.ORG - posted 11:06, Friday 18 April 2014 - last comment - 15:13, Friday 18 April 2014(11434)
BSC-ISI Blend Filters Cleaned Up

JimW, HugoP,

With the recent blend design activities, a lot of filter files (.mat) were created, some were duplicated multiple times in the folder tree, while only a few were actually used. Some filters were also installed in the wrong slot, with the wrong name. For example: Start filters were installed in ITMX's TCrappy, TBetter was installed in ETMX's TCrappy. This can be quite mis-leading for the commissioners and we should avoid it.

We figured out which filter files should be used. We took those and gave them clear names in the common BSC part of the seismice SVN as follow, and removed every duplicate we found in the folder tree:

/ligo/svncommon/SeiSVN/seimic/BSC-ISI/Common/Complementary_Filters_BSC_ISI/aLIGO/

 

The Step_6 unit-specific scripts were modified for each BSC-ISI chamber to prevent accidentaly loading the wrong filter into the wrong slot again.

Every BSC-ISI blend filter was reloaded this morning at 9:35AM, from the agreed generic blends mentioned above.

Work will be commited to this SVN today, to facilitate next week's commissioner hand-off.

Comments related to this report
hugo.paris@LIGO.ORG - 15:13, Friday 18 April 2014 (11444)

I copied all the temporary blend fiters under:
/ligo/svncommon/SeiSVN/seimic/BSC-ISI/Common/Complementary_Filters_BSC_ISI/aLIGO/Temporary_Versions/

Now the regular blend filter folder only contains the ones to be used:
/ligo/svncommon/SeiSVN/seimic/BSC-ISI/Common/Complementary_Filters_BSC_ISI/aLIGO/

  • Start_Blend.mat
  • TBetter.mat
  • TCRappy.mat
H1 DAQ (CDS, SUS)
david.barker@LIGO.ORG - posted 11:01, Friday 18 April 2014 (11435)
DAQ restart to
DAQ restart at 10:49 to support new SUS models. Will require additional DAQ restarts today.
 
2014_04_18 10:21 h1susetmx
2014_04_18 10:43 h1susitmx
2014_04_18 10:43 h1susitmy
2014_04_18 10:49 h1broadcast0
2014_04_18 10:49 h1dc0
2014_04_18 10:49 h1fw0
2014_04_18 10:49 h1fw1
2014_04_18 10:49 h1nds0
2014_04_18 10:49 h1nds1
2014_04_18 10:43 h1susitmx
2014_04_18 10:43 h1susitmy
2014_04_18 10:49 h1broadcast0
2014_04_18 10:49 h1dc0
2014_04_18 10:49 h1fw0
2014_04_18 10:49 h1fw1
2014_04_18 10:49 h1nds0
2014_04_18 10:49 h1nds1
LHO General
patrick.thomas@LIGO.ORG - posted 09:46, Friday 18 April 2014 (11431)
Ops Morning Summary
08:50 Corey, Thomas staging viewport covers by LVEA X arm beam manifold
Kyle soft closed GV7
08:58 Betsy, Travis getting parts from ITM build area
09:11 David H, Matt H. working on TCSX, TCSY
Kyle to open GV5, GV18
09:27 Alexa to end Y to take fiber noise measurements
09:27 Richard done installing lexan viewport cover
H1 SEI
arnaud.pele@LIGO.ORG - posted 09:38, Friday 18 April 2014 - last comment - 17:05, Friday 18 April 2014(11432)
HEPI Position Control or fluid flow appears to NOT contribute to ETMY ~10hz Resonance

Arnaud & Hugh

We quickly looked at this.  We didn't expect an effect but HEPI PS control runs at ~10hz (Epics) and we could check so we did.  The attached looks at the Pier top horizontals over the ground STS2.  All the horizontsl HEPI signals looked the same wrt both horizontals of the STS2s.  First Ref is ISI OFF, HEPI position loop ON, Second Ref is ISI OFF, HEPI Position Loop OFF, current trace is with the fluid flow zeroed.  No affect evident.

Images attached to this report
Comments related to this report
arnaud.pele@LIGO.ORG - 17:05, Friday 18 April 2014 (11453)

I guess I was wrong. After taking a closer look at it, closing the position loops on HEPI is actually amplifying the motion at 10Hz, by a factor of ~3. References are with position loop off.

Images attached to this comment
H1 AOS (DetChar, SEI)
laura.nuttall@LIGO.ORG - posted 08:22, Friday 18 April 2014 - last comment - 11:47, Friday 18 April 2014(11429)
Something at ~11Hz is causing amplification of pier resonance at ETMY
I've been looking in to the pier resonance in different chambers over 5 minutes worth of data on 16th/17th of April when the ODC reports good times for a specific chamber. The pier resonance usually appears as an increase in motion (by about an order of magnitude) when you compare the L4Cs at the top of the HEPI piers to the ground STS at ~8 Hz. The first attached image shows this comparison for BS/ITMX/ETMX which all show this pier resonance in the X and Y directions only (this plot is 5 minutes worth of data from the time in the name). If you look at however ETMY (second attached image) things look different. In this image I compared the L4C to the PEM ACC since the GND STS is outputting values close to zero. However the pier resonance seems to be amplified more than other chambers, particularly by this feature at ~11Hz which shows up in X/Y/Z directions. This is causing an extra order of magnitude increase in noise than I would normally expect for the pier amplification at ~11Hz in the X and Y directions. The third plot just shows the BS/ITMY/ETMY aswell. I've looked at several different times of day over both days and the results all look the same. It does not seem to change according to the time of day.
Images attached to this report
Comments related to this report
arnaud.pele@LIGO.ORG - 09:40, Friday 18 April 2014 (11433)

For info, "ODC reports good times" when HEPI is position controlled (locked to the ground)

laura.nuttall@LIGO.ORG - 11:47, Friday 18 April 2014 (11438)DetChar, SEI
Looking at LLO

Not sure if this is related, but I looked at LLO (within the last week) at times when the ISI state vector is green (since the HEPI state vectors are hardly ever green) over 5 minutes and compared the same things as above (L4C to ground STS). BS/ITMX/ETMX (first plot) shows very similar features at both sites - a peak at ~8Hz in the X and Y directions. However when looking at BS/ITMY/ETMY (second plot) the BS/ITMY chambers at both sites look the same with a peak at ~8Hz but ETMY at LLO has a much sharper and more pronounced peak at ~11Hz in the X and Y directions. This doesn't look exactly to same as the ETMY peaks at LHO but I thought it might be interesting!
Images attached to this comment
H1 SEI
hugo.paris@LIGO.ORG - posted 16:03, Wednesday 16 April 2014 - last comment - 14:37, Friday 18 April 2014(11391)
BSC-ETMY - Performance

JimW and I worked on getting the performance of BSC-EY comparable to the performance of BSC-EX, before handing off to SUS.

BSC-EY now has the following control tools installed:

We compared the performance of BSC-EY with the performance of BSC-EX, with both platforms under BSC-EX's most used configuration:

Attached Plots show comparable performance of the ISIs, at the projected suspension point, for similar ground motion at both end stations. (plots calibrated in nm and nrad).

One can notice a 10Hz peak, on BSC-EY spectra. We went ahead and took performance spectra at EY with the Isolation off. The peak is also there when the isolation and damping loops are off. Hence, the peak seen at 10Hz is neither caused, nor amplified, by the ISI active controls.

Since SUS provides plenty of isolation at 10Hz, we decided to give them the go ahead to start their testing.

 

 

Meanwhile, JimW and I kept investigating. We noticed that HEPI L4Cs were seeing the 10Hz peak too, and that it is mostly seen on the vertical L4Cs (see Page 1 of last attachment). We were able to reduce this peak's amplitude by a factor of ~10 by simply turning HEPI position loops off (see Page 2 of last attachment). It looks like HEPI-EY position loops are somehow amplifying the 10Hz peak, but they are not its source, as the peak still appears clearly with HEPI off.

Non-image files attached to this report
Comments related to this report
hugo.paris@LIGO.ORG - 14:37, Friday 18 April 2014 (11442)

I previously wrote that the ~10Hz peak was mostly seen on the vertical L4Cs, while it is actually seen on the Horizontal L4Cs.

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