The system which runs on cdslogin and sends emails and cell phone text messages if certain vacuum or fmcs EPICS signals go out of nominal was reconfigured and restarted. The changes are:

• Mark Lubinski was still getting the daily cryopump and gauge reading emails (or rather we wasn't, they were getting bounced back to me)
• Bubba was added to all FMCS alarms (both his cell and email accounts)
• The FMCS reverse osmosis alarm was added to the system

https://redoubt.ligo-wa.caltech.edu/websvn/filedetails.php?repname=projects&path=%2Ftrunk%2Femail_alarms%2Fh0ve_configuration.xml

07:15 Rick to EY for PCal

08:00 Ops phone apparently not ringing

08:16 Sudarshan to EX end assuming Rick went there. Rick reported no one answered at ops. (ringer)

08:20 re-booted FOM video4

08:42 Kingsoft on site

09:10    Rick and Sudarshan to both end stations to do calibrations on Pcal. Will not be moving mirrors.

09:12 P King into LDR

09:15 Peter out of LDR

09:20 Jodi at MidX

09:25 Jodi out of MidX

09:31 Kingsoft off site

09:32 Bubba to begin strip installation on X arm just the other side of the berm

09:50 Richard to EX to check out phones

10:17 Richard back from EX

10:21 Jodi back from MidY.

10:53 Pcal team out of the Ends

11:00 Rick Nutsi and Sudarsh back from End stations

11:02 Pcal team back out to EY

11:05 2 tour groups in succession into the control room

12:30 Rick et al finished at EY

12:35 Begin initial alignment

12:42 Dark Mich locked

12:55 initiated ISC_LOCK

13:16 DC readout. will stay here and asses before proceeding to LSC_FF

14:30 Sigg went to MidY

14:45 Sigg back from MidY

Sometime earlier in the week one of the storms knocked the phones out at End x.  I have traced it down to the switch at the corner station.  I have reprogrammed a different port to connect to the end station and the phone should now work

Jeff, Evan

The current CW hardware injections into DARM control are too loud to allow transitioning from ETMX to ETMY. So we turned them off around 21:00:00 by turning off the input to CAL-INJ_HARDWARE.

On ETMX, the loudest line (at 1395 Hz) has an rms of about 2 counts. For ETMY (with the low-pass filter on the low-noise driver), one must actuate 50×(50/2.2)² ­≈ 26000 times harder at high frequencies. That means the ESD will have to push 50000+ counts rms. The attached plot shows the DARM drive at a few points along the actuation chain (only ETMX was used as an actuator). The hardware injection does not show up in DARM_OUT, or in the version of DARM_OUT that it sent to the CAL model. It does show up in the ETM drives. The attached screenshot helps us remind ourselves of the relevant model topology.

Also note that this is happening at frequencies above the Nyquist of the quad drive DQ channels, which is currently 1 kHz. That means it would have been much harder to catch this if we had been trying to do a lockloss analysis after the fact. The same goes for instances where the drive is being saturated by higher-order violin harmonics, as has happened in the past.

Here is a recent DARM spectrum, taken with 24.6 Watts of power into the IMC, with the new low noise ESD driver with the low pass on.  

The peaks around 300 Hz which are worse than in the reference are coherent with the PSL periscope, we might be able to adjust IMC WFS offsets to improve this.  There is also coherence with SRCL, there was no feedforward of MICH or SRCL durring this time.  

This lock stretch did not appear on the summary page, this must have to do with the change on the sumary page from H1:DMT-SNSW_EFFECTIVE_RANGE to H1:DMT-SNSH_EFFECTIVE_RANGE.  I'm not sure when the SNSH is calculated, but we should note that some good lock stretches are now missing from the summary pages.  

I have restarted h1broadcast0 with the latest DMT channel list from John Z. Number of channels was reduced from 1080 to 928 (removed 284, added 132)

https://redoubt.ligo-wa.caltech.edu/websvn/filedetails.php?repname=cds_user_apps&path=%2Ftrunk%2Fcds%2Fh1%2Fdaqfiles%2Fini%2FH1BROADCAST0.ini

Something is not healthy on SR2 suspension.

Recently we noticed that some DAC on SR2 suspension saturated intermittently at a rate of roughlu once per 10 minutes or so. At the begginig we thought this was due to some ISC feedback saturating some DACs when we lock the interferometer. However, it turned out that it saturates even when no ISC feedback is sent.

The attached is a one-hour trend of all the saturation motniors of the SR2 top stage actuators from the period when SR2 was aligned and damped without any ISC feedback signals yesterday. As seen in the plot, the RT and LF DACs saturated mutiple times. The LF saturated more frequently than the RF actuator. Looking at the suspension screen, Betsy and I found that the longitudinal dampig showed higher signal level at its output than every one else. It is on the order of 100 counts at the output. Betsy is currently checking the longitudinal damping loop by running a transfer function measurement.

I wrote this earlier and then got distracted and too smart (logged out of machine), apolgies for the delay.

Untripped watchdogs around 0800+ pdt.  No issues with untripping.  HAM5 ISI did have rogue exc alarm as well.  BS was only HEPI tripped--is this because of the large vertical drive?  Could be.

Here are the X1 and X2 module pressures while the tube washing has been progressing. The features present are those resulting from ION pump voltage changes, gate valve cycles,  and a repair of a leaky metal valve at XEND.

Rick Savage and the Pcal Team request NO IFO LIGHT IN THE ARMS while they are at the end stations doing calibration work. This activity will take approx 2 hrs or until they report to the operator. (whichever comes first). That is all.

Calibration run ends today at 12:01PM

Annealing begins today at 12:01PM

SUS - no report

SEI - no report

Pcal - Rick and co. finishing calibration efforets at both end stations. Mirrors will remain in nominal states w/ no shaking. Only alognment of pcal will take place.

FAC - Issues with RO water ongoing. Installation of aluminum strips wil begin today

Jim batch announced an upcomin computer upgrade for FOM monitors. MAC mini will be replaced with Intel nook. (possibly video4)

Vern mentioned re-implementation of Betsy's LockLoss Pie chart to track destructive ground motion around the site.

CDS model and DAQ restarts during the first three days of the ER7 period.

* = unexpected restart

model restarts logged for Tue 26/May/2015
2015_05_26 11:22 h1susetmy
2015_05_26 11:27 h1hpiham4
2015_05_26 11:27 h1hpiham5
2015_05_26 11:27 h1iopseih45
2015_05_26 11:27 h1isiham4
2015_05_26 11:27 h1isiham5
2015_05_26 11:45 h1broadcast0
2015_05_26 11:45 h1dc0
2015_05_26 11:45 h1fw0
2015_05_26 11:45 h1fw1
2015_05_26 11:45 h1nds0
2015_05_26 11:45 h1nds1
2015_05_26 17:02 h1fw1*
2015_05_26 20:06 h1fw1*

model restarts logged for Wed 27/May/2015
2015_05_27 08:27 h1iopsusb123
2015_05_27 08:27 h1susbs
2015_05_27 08:27 h1susitmx
2015_05_27 08:27 h1susitmy

model restarts logged for Thu 28/May/2015
2015_05_28 01:56 h1fw0*
2015_05_28 06:17 h1fw1*
2015_05_28 12:44 h1calcs
2015_05_28 12:44 h1calex
2015_05_28 12:44 h1caley
2015_05_28 12:46 h1broadcast0
2015_05_28 12:46 h1dc0
2015_05_28 12:46 h1fw0
2015_05_28 12:46 h1fw1
2015_05_28 12:46 h1nds0
2015_05_28 12:46 h1nds1
2015_05_28 13:04 h1iscex
2015_05_28 13:08 h1calex
2015_05_28 14:45 h1calex
2015_05_28 14:57 h1calex
2015_05_28 15:22 h1calex
2015_05_28 15:22 h1caley
2015_05_28 15:24 h1calcs
2015_05_28 15:34 h1broadcast0
2015_05_28 15:34 h1dc0
2015_05_28 15:34 h1fw0
2015_05_28 15:34 h1fw1
2015_05_28 15:34 h1nds0
2015_05_28 15:34 h1nds1

- 4 locks that made it far enough to produce a range, though the calibration is currently inacurate, and so is range

- first CW injection of aLigo, see Eric Thrane's alog #18681

- bounce mode on ETMX and sometimes ITMX a problem, and Jeff and I reduced the gain on ETMX manually several times, so Evan has reduced the gain that Guardian sets

- tidal on ETMX was off, and is now on

- collecting templates - Sheila gave ops a few new ones which are in the ops/Templates directory

- IFO is unlocked and leaving it  with Evan and Jeff

E. Hall, J. Kissel, C. Vorvick

The 7.0 Mag EQ in Chirikof Island, AK hit the IFO hard, and has ended activity for the night. Almost all SEI and SUS have tripped, and we've left before the ground was settled enough to untrip them. We'll leave it up to morning crew to recover.

D. Barker, J. Batch, K. Izumi, S. Karki, J. Kissel, R. Savage, D. Tuyenbayev, C. Vorvick

We've finished the bulk of the invasive calibration work today. The PCAL team needs a little bit more time tomorrow, but they'll come in early such that they're finished before 12p PT. Here's a recap of this past day's activity:

J. Kissel, K. Izumi
Retook free swinging Michelson measurements, this time using ETMX ESD and the Full DC Readout DARM sensor as another middle man to propagate the ITM drive to MICH [m] through to all three stages of  ETMY. Preliminary results from yesterday indicate good agreement between model and measurement for at least ETMY L2 between 4-7 [Hz], with the statistical uncertainty and measurement scatter blowing up below 4 [Hz]. (Detailed analysis and aLOG to come)

K. Izumi
Adding ETMX L3 drive to ALS DIFF to the collection of transfer functions so we can propagate the ALS DIFF VCO calibration to ETMY using the same ETMX to DARM and ETMY to DARM TFs taken for the above free-swinging MICH. (Detailed analysis and aLOG to come)

J. Kissel, D. Barker, J. Batch
Updated the CAL_INJ_MASTER, PCAL_MASTER, and CAL_CS_MASTER library parts to 
     - obtain some updates to the hardware injection infrastructure for GRB alerts and well-commissioned ODC vector,
     - add a monitor channel after the ring buffer of the CAL-CS actuation chain
     - add infrastructure to use ITMs as DARM actuators into the DARM actuation calibration path
     - change the blind injection filter bank to be named "BLIND" instead of "BLND",
     - add infrastructure for eventually computing a optical gain correction coefficient in the corner station using PCAL lines* 
*see details in LHO aLOG 18671

E. Thrane, J. Kissel, C. Vorvick
Tested CW Hardware Injections; see LHO aLOGs 18681 and 18682.

Goals for tomorrow:
J. Kissel, K. Izumi
Finish processing the ALS DIFF and Free Swinging MICH assessments of the ETMY actuation strength, and update DARM model accordingly

J. Kissel
Process DARM OLG TF from LHO aLOG 18662, and compare against new DARM model

J. Kissel, K. Izumi
Update CAL-CS front end calibration to account for new Low Noise ESD driver strength and new L1, L2, L3 actuation scheme, and shift down the DARM coupled cavity pole frequency to our best measured of 355 [Hz] instead of 389 [Hz].

R. Savage, S. Karki, D. Tuyenbayev
Complete measurements of photodiode frequency response at both End Stations.

J. Kissel, R. Savage, K. Izumi, S. Karki, D. Tuyenbayev
Measure PCAL to DARM transfer functions for both end stations, begin to develop a model for the transfer function to inform sensing function scale coefficient, independent measure of cavity pole frequency, etc. etc.

Chris B, Jeff, Eric

Starting at GPS = 1116915517, we turned on the HWINJ with gain=10 to run in the background indefinitely.  The idea is to make the CW signal loud enough that CW can recover some of these signals with just a few days of data, but weak enough so that they don't disturb the strain spectrum significantly.  If these jobs are found to cause a problem with anything, simply disable the injections with the off switch in the cal model.  NOTE: the overall injection gain is now set to 10, so any tinj injections should be scaled DOWN by 10x.

Here are the CW signals that are currently active (frequency and amplitude shown below not including gain=10 factor):

-bash-4.1$ grep Freq *cfg
Pulsar0_StrainAmp.cfg:Freq              = 265.5771052           ## GW frequency at tRef
Pulsar1_StrainAmp.cfg:Freq            = 849.0832962     ## GW frequency at tRef
Pulsar2_StrainAmp.cfg:Freq            = 575.163573      ## GW frequency at tRef
Pulsar3_StrainAmp.cfg:Freq            =  108.8571594    ## GW frequency at tRef
Pulsar4_StrainAmp.cfg:Freq            = 1403.163331     ## GW frequency at tRef
Pulsar5_StrainAmp.cfg:Freq            = 52.80832436     ## GW frequency at tRef
Pulsar6_StrainAmp.cfg:Freq            = 148.7190257     ## GW frequency at tRef
Pulsar7_StrainAmp.cfg:Freq            = 1220.979581     ## GW frequency at tRef
Pulsar8_StrainAmp.cfg:Freq            = 194.3083185     ## GW frequency at tRef
Pulsar9_StrainAmp.cfg:Freq            = 763.8473165     ## GW frequency at tRef
Pulsar10_StrainAmp.cfg:Freq            = 26.3589129             ## GW frequency at tRef
Pulsar11_StrainAmp.cfg:Freq            = 31.4248598             ## GW frequency at tRef
Pulsar12_StrainAmp.cfg:Freq            = 39.7276097             ## GW frequency at tRef

-bash-4.1$ grep aPlus *cfg
Pulsar0_StrainAmp.cfg:aPlus           = 2.0125e-25            ## plus-polarization signal amplitude
Pulsar1_StrainAmp.cfg:aPlus           = 6.4405e-25            ## plus-polarization signal amplitude
Pulsar2_StrainAmp.cfg:aPlus           = 3.74175e-24            ## plus-polarization signal amplitude
Pulsar3_StrainAmp.cfg:aPlus           = 8.1915e-24           ## plus-polarization signal amplitude
Pulsar4_StrainAmp.cfg:aPlus           = 2.45645e-23            ## plus-polarization signal amplitude
Pulsar5_StrainAmp.cfg:aPlus           = 2.94475e-24            ## plus-polarization signal amplitude
Pulsar6_StrainAmp.cfg:aPlus           = 3.54275e-25            ## plus-polarization signal amplitude
Pulsar7_StrainAmp.cfg:aPlus           = 1.728625e-24            ## plus-polarization signal amplitude
Pulsar8_StrainAmp.cfg:aPlus           = 7.9815e-24            ## plus-polarization signal amplitude
Pulsar9_StrainAmp.cfg:aPlus           = 5.6235e-25            ## plus-polarization signal amplitude
Pulsar10_StrainAmp.cfg:aPlus           = 2.343323e-024          ## plus-polarization signal amplitude
Pulsar11_StrainAmp.cfg:aPlus           = 9.958896e-024          ## plus-polarization signal amplitude
Pulsar12_StrainAmp.cfg:aPlus           = 1.331275e-025          ## plus-polarization signal amplitude

Cheryl, Jeff, Eric

We carried out the first successful demonstration of CW injection with aLIGO.  Previously, we have tested the injection code, but we hadn't been able to confirm that the injections were making it into the detector.  Cheryl and Jeff put H1 in a low-noise DC state with ~30 Mpc inspiral range.  The intent bit was turned on.  We turned on the injections at 22:19:20 to confirm that the excitation showed up in the filter bank.  However, the injection amplitudes are too weak to show up by eye in the spectrum (by design) and so we prepared to increase the amplitude.

For the second test, which started at 22:26:44, we made one of the injections 10x louder than the others so it would show up as a sharp line.  We chose to carry out the test with Pulsar #0, which has a frequency of f0 = 265.5771052 Hz and a strain amplitudes of aPlus=2.0125e-25, aCross=1.960625e-25.  We increased these values of aCross and aPlus by a factor of ten and restarted the injections.  Jeff could not see them by eye in the control room spectrum.  We increased the gain on the injection channel until we Jeff could be absolutely sure he saw a CW line.  (For CW/detchar people looking at this data, you will see the signal get louder according to step function factors of ten.)  Jeff could clearly see the line when we set the gain to 200, corresponding to strain of ~2e-25 x 10 x 200 = 4e-22 or displacement of 1.6e-18m.  We confirmed that the measured displacement approximately matched the value predicted by the pulsar injection configuration file.

We turned off the injections in order to restart them with a lower amplitude.  However we lost lock before we restart.  The injections ended sometime not long after GPS = 1116912836.

In the course of this test, we found a good preliminary value to use for the HWINJ LIMIT.  In order to avoid clipping, we set LIMIT=200.  This allowed us to create a strong line.  The output of the control loop during this time was O(10,000).  I suggest that we use LIMIT=200 as a new default and see if that gives us enough range for our transient injections.

After a measurement of charge on each ETM yesterday, I took a few more on each today.  Attached show the results trended with the measurements taken in April and Jan of this year.  There appears to be more charge on the ETMs than in previous measurements, although there is quite a spread in the measurements.  The ion pumps at the end stations are valved in.

Dan, Evan, Sheila

Tonight we started to look at the angle to length couplings of our test masses.  We injected lines into pitch and yaw on the PUMs, and adjusted the A2L gains to minimize them.  Using the math in the 40 meter alog and Jax's alog, we can estimate the miscentering from these measurements

After we had adjusted these, we saw an improvement in the spectrum below 20 Hz.  The line in the attached screen shot at 16.6 Hz with sidebands at half a hertz are the excitation.  Keep in mind that this is on the new ESD driver and we haven't redone the calibration yet, but clearly this improved the noise below 20 Hz.  

Earlier in the evening we were having difficuulty powering up because of a pitch instability at the main suspension resonant frequency that showed up in all the test masses.  We moved the QPD offsets for pitch back to what they were may 15th, (they had been changed last tuesday).  We then remeasured the miscentering for pitch only, things were a little bit better.  Once we increased the power to 17 Watts, the IFO was stable and we repeated some of the measurements.  We were able to power up to 23 Watts without seeing the instability twice, but lost the lock quickly for other reasons.