Jim and Dave,

WP4803. We used h1ioppemmx model to check the cdsEzCaRead part was operating correctly with the latest RCG version. I was going to add readbacks for the cdsEzCaRead part used in lieu of a local IRIG-B timing source, but we decided against that at this moment in time as the DAQ would have required a restart. 

The tests were successful, there is no problem with EzCaRead. Code was reverted to original at the conclusion of the test.

The x1work computer has been rebuilt, it is running Ubuntu 12.04 workstation.  The test stand should be functional at this point.  It's highly likely that some packages needed are not installed on x1work, send me an email and I'll get it installed for you.  

The Remote Host Identification has changed for x1work, so it will complain when you log in.

The Comtrol unit for the Mid-Y weather station appears to have failed during the power recovery.  Link lights are dim and flashing rapidly.  Power cycling did not help.  Troubleshooting is ongoing, but for now, the weather station at Mid-Y is offline.

Dave Barker, myself.

The fiber to the timing slave on h1susauxex I/O chassis does not latch into the SFP, and one fiber from the pair was not fully inserted into the SFP.  This caused the timing to be off by quite a bit.  The diagnostics for the timing fanout showed that nothing was connected to the port. While we were troubleshooting, we found that only one of the fibers latches into the SFP at the timing fanout. The latching tabs on the fiber may be bad, a new fiber should be tried to see if it latches any better.  For now, they are just pushed in and held by some nominal amount of friction, but this is not a permanent fix.  

At some point it would be useful to audit the other timing fibers, but if one is loose, it will cause problems with the models when it becomes detached from the SFP.

On Wednesday before shutting down Hanford for today's power cut, I managed to do another measurment this time with the wire for the LL quadrant going through the ESD LP filter box instead of BIAS as it should have been. To be clear, this is the old configuration and we wanted to see the effects this cable configuration has on the charging measurements.

I have attached here the measurement documentation and the Veff plots for pitch and yaw which also include the measurement one day before for comparison.

The current measurement took place between UTC (2014-08-13 21:48:00) and UTC (2014-08-13 23:00:00), while the previous one took place between UTC (2014-08-12 17:17:00) and UTC (2014-08-12 19:09:00), the ESD LL quadrant wire swap too place at about UTC 2014-08-12 20:00:00. Notice that a couple of hours after the cable swap there was a power glitch which shutted down the ESD power supply so the ESD was not charged until the current measurements took place. This is something to take into acount, between the measurements compared in the plots and in the table below the ESD was off. I have verified that the ion pump, the iluminators and the cold cathode were on during this time (see plot below). Because looking at the Veff values in the table we see that after the cable swap the charge values did not change much, with the only exception of the quadrant that had a charge of opposite sign to the rest. This charge reversed once again to common sign to the other quadrants.

The IOC for the MetOne 227b dust monitors was accidentally running. I stopped this one and started the one that Jim B. wrote for the new MetOne dust monitors.

(John W, Daniel S, Keita K)

The viewport on the HAM5/6 septum was rotated by 120 degree clockwise. Torqued to 16 lbs.foot as per the spec. We didn't have to use a new O-ring as the old one was intact.

Corner Station - we are currently vented. 
OpLev - Doug and Jason doing work at End-X (waiting on CDS to begin ) Also, the mitigation of equipment damage was brought up
End-Y - Borja may me taking more measurements using higher resolution. HEPI currently NOT running. IRIG-B not running cleanly after power restored
End-X - Krishna will be connecting the tilt-meter to the LIGO DAQ
B&K Hammering will be taking place at end stations. Still unclear as to where it will start.

Late entry for Wednesday's restarts

model restarts logged for Wed 13/Aug/2014
2014_08_13 00:39 h1fw1
2014_08_13 01:39 h1fw1
2014_08_13 09:29 h1fw1
2014_08_13 10:48 h1nds1
2014_08_13 10:57 h1nds1
2014_08_13 13:15 h1iopoaf0
2014_08_13 13:15 h1oaf
2014_08_13 13:15 h1odcmaster
2014_08_13 13:15 h1pemcs
2014_08_13 13:15 h1tcscs
2014_08_13 13:24 h1iopoaf0
2014_08_13 13:24 h1oaf
2014_08_13 13:24 h1odcmaster
2014_08_13 13:24 h1pemcs
2014_08_13 13:24 h1tcscs
2014_08_13 18:31 h1ioppsl0
2014_08_13 18:31 h1pslfss
2014_08_13 18:31 h1pslpmc
2014_08_13 18:33 h1psldbb

unexpected restarts of h1fw1. Some DAQ min trend work required nds restarts. Stuck PEM ADC channels required h1oaf0 restarts (residual from Tue power glitch). PSL restart part of power outage shutdown prep.

Power outage day. All CDS computers were restarted. The total number of restarts is 138. Full log in attached text file. No unexpected restarts.

In /ligo/cds/lho/h1/burt/2014/08/13/08:10 I ran:

burtwb -f h1ecatx1plc1epics.snap
burtwb -f h1ecatx1plc2epics.snap 
burtwb -f h1ecatx1plc3epics.snap 
burtwb -f h1ecaty1plc1epics.snap
burtwb -f h1ecaty1plc2epics.snap 
burtwb -f h1ecaty1plc3epics.snap

Jeff K., Krishna V.

I analyzed the data from the T240 (labeled as STS atm) on the ground (about ~ 1 m away) and have attached three plots.

To make them I used 7k seconds of tiltmeter and T240 data from Tuesday night, roughly between 9:10 PM to 11:10 PM. I resampled both data sets to 1 Hz to get them on the same time base. Then I compared the phase of the T240 signal (converted to acceleration) against the tiltmeter signal in 10-100 mHz range and time shifted them until the phase lined up, as shown in the second figure.

I've also shown the residual, obtained by subtracting the time series of the two signals. We are limited by being on different clocks and DAQs, but even so, the coherence is decent. Just as I saw in our lab at UW, there is good coherence when both see tilt and very little coherence when the seismometer is seeing horizontal displacement while the tiltmeter still sees tilt.
 
Edit: I've attached the data in the format: columns [time   T240*w^2/g   tiltmeter]

During the power outage yesterday, verified CPS units for BSC1, BSC2, and BSC3 had modifications per E1300251. This was to address a high frequency oscillation in the return path.

BSC1 SN 12867
BSC1 SN 13525
BSC2 SN 13449
BSC3 SN 12951, 12892, 12959, 12958, 12961, 12895, 12904, 12945, 12948, 13430, 13235, 13444

All units had modifications complete.

Filiberto Clara

J. Kissel, T. MacDonald

While waiting for the CDS system to be restored after the scheduled power outage, and for B&K to release licenses, Tim and I spent some quality time with a 3 [lb] sledge hammer, a GS13, some concrete, and SR785. We found a large (~45x12 [sq.ft]) area of empty open LVEA floor (don't tell Jodi!), set up a GS13 in the middle, and used a B&K hammer to hit 10 locations along an 40 [ft] line, each separated by 5 [ft]. Sadly, I think the result is null, but still -- null results can be interesting results. If one squints their eyes, one might be able to claim some coherence with a feature between 5-10 [Hz], but we would need more data to determine if anything in this measurement real slab dynamics. Plots attached, details below.

Details
-------
Timeline
- Hooked up S13 and Hammer to SR785
- Tried several binwidths and frequency ranges, looking for interesting features
- Didn't get any consistent coherence; looked at spectra of S13; decided its spectra looked too featureless and time series didn't look too promising
- Grabbed GS13s 568V and 574V, some power supplies, and freshly made power cable
- After some struggles with a wonky power supply, confirmed that both GS13s 568V and 574V are fully functional (looking at time series alone) with different power supplies
- Hooked up GS13 to SR785, with hammer
- Played with bandwidths and frequency ranges again (went as low as 62 [mHz]), settled on 1 [Hz] binwidth, from 1-400 [Hz], with 10 avgs. We justified the range with "the sledge wouldn't be able to move enough mass to excite anything lower than 1 [Hz], and we're already getting crap coherence, might as well make the measurements quick."

Cable construction:
- Used D0902011 to determine pinout of signals coming out of GS13 military connector. The GS13 needs +/- 15 [V] on pins D and F, respectively with pin R as GND. The +/- legs of the differential GS13 signal are on K and L, respectively. 
- Followed signals through Signal / Power pigtail breakout cable that came already attached to the GS13. D to pin 1, F to 3, and R is connected to both 2 and 4. The + GS13 signal is connected to the inner coax of the BSC, and - to the sheild (*tsk*tsk*). See attached pictures for connector pinouts of mil and power connections.
- Aaron/Richard fabricated a power-to-banana cable. (+15 [V]) 1 to Red, (GND) 2 to Green, (-15 [V]) 3 to White, (GND) 4 to Black, though the banana ends of both Green and Black are Black.

Calibration of TF:
- B&K Hammer: 
   - gain = 0.2356 [mV/N] (from calibration datasheet)
   - assumed frequency independent
- GS13: 
   - 2200 [V/(m/s)] (from eLIGO knowledge, confirmed by a few web sources)
   - assumed frequency independent, since instrument response is flat above 1 [Hz] natural frequency of the instrument
   - D050358 preamp gain of (1+R2/R1)*(1+R4/R5) = 40.2 [Vout/Vin]
   - Integrated once (divided by 2*pi*freq) to get displacement units
   - Divide by 2 for only reading in one leg of differential signal

Data and analysis script live in 
${SeiSVN}/seismic/Common/Data/2014-08-14_LHOLVEASlabCharacterization/

Peter, Jim, Dave

Peter K found that he could not open the PSL shutter. We did the usual MEDM button presses which used to work to no avail. After restarting the FE and beckhoff ends several times, we reverted the PSL from the new RCG2.8.5 to its old 2.8.3. In this configuration we were able to open the shutter (though not cleanly). Tomorrow we will investigate (using the DTS) if it was the upgrade which caused this problem. For now we will leave h1psl0 at RCG2.8.3 and the laser is operational.

The following suspensions had their IOP as well as USER watchdogs reset. A burtrestore was done, restoring a snapfile from yesterday afternoon (August 13 at 17:10). Then guardian was set to "DAMPED" for all of them (except the IMs since no guardian) : MC1 MC2 MC3 PRM PR2 PR3 SRM SR2 SR3 BS ITMX ITMY ETMX ETMY TMSX TMSY OMC.
Currently, no alignment offsets are engaged.

(Koji, Alexa, Dan)

We examined the beam path in HAM6 to OM1 in order to figure out the angle of the beam. We made measurements at four different points. Using an (x, y, z) coordinate system with z = up, y = East, x = South, we find at (all in mm):

Edge of table: (20.32, 0, 98)

Intermediate point 1: (0, 552.72, 95)

Intermediate point 2: (-25.4, 1219.2, 93)

OM1: (-40.64, 1574.8, 91)

The error of the measurement in height is ±1mm, and the error along the x, y axis is ±2.5mm. The attached layout shows the original (red) beam path and the new (green) beam path. From this layout, one can see the actual vs. measured angle deviation in height and along the hoirzontal plane.  Using the points above, we made a linear regression and determined the vertical angle of the beam to be 4.3 mrad. The attached plot shows the data with error bars and the linear fit.