(Entry by Kyle) 

John, Kyle, Daniel

Today we finished roughing and transferred to the turbos (YBM, XBM, Vertex) -> I valved-out and spun down the Vertex turbo @ 1530 hrs. local -> Currently, the turbos are being backed by the QDP80 roots pumps -> Tomorrow, I'll switch to backing with the nominal small scroll pumps (these had been loaned to the Y-end for Rai's ionization apparatus)

(Daniel, Koji, Alexa)

The FSS was not stable again. We turned off the ISS and that seemed to fix the problem. We are leaving the ISS off so that we can work on HAM6. It still remains to debug what is wrong with the ISS.

The weather station at MY had not been giving data so the comtroller was removed. See log 13433.  It turned out to be the power supply for the comtroller.  The unit has been replaced and the software restarted.  Had to remember to boot the weather station to get it reconnected to the comtroller. 

So, apparently, the loss of a management network link causes the SataBoy controllers to fail, as evidenced by three simultaneous alarms when I powered off the management switch in preparation to swap it out.  Yay.  I have silenced the alarms, and so far C1 on each array appears to be working.  Message on serial console was 'Controller C0 has a firmware fault', and status LED was still green until I booted the switch, at which point the status LED went red and the serial console message changed to 'RAID controller 0 failed'.  More details to follow.

Keita, Kiwamu, Patrick,

Richard noticed that the PSL kept flickering once a minute or so. Looking at the PSL screens, we found that the FSS was unable to find a 00-mode. This kept unlocking the PMC because of the large temperature scan by the FSS auto-locker.

We changed the temperature scanning range from [-0.1 : 0.1] to [-0.2: 0] K. Immediately a 00-mode was found slightly below -0.1 K. This is why the FSS was unable to find it. Now the FSS seems happy.

Also, Keita and Patrick took at look at trend of some PSL temperature sensors. There was a clear coherence between the NPRO locking point in its temperature and the PSL room temperature. According to a sensor, the room temperature dropped from 73 to 71.5 F over the past month.

Doug working on optical lever for SR3
HAM6 fine alignment waiting for vacuum
tiltmeter hardware installed, analyzing data
charging measurements moving to end X
B & K hammering at end X

Pressure still at 0.77 Torr. Roughing valves opened at 0730.

no restarts reported

Entry by Kyle

T. MacDonald, J. Kissel

Initial measurements of the H1EX piers and floor were taken on 8-15-14 to establish that the B&K system and accelerometers were functioning as expected. These were done with a B&K 4506 
accelerometer on each north edge of the top of north side piers, and another on the north side of the chamber about 5 ft from the top. The B&K 8340 accelerometer was centered under the beam tube 
and 1 ft north of the center line between the north piers. During these measurements, no features were found near 8 Hz.

There were some concerns about the coherence of the 4506 accelerometers at 8 Hz, which was generally below 0.5. The 8340 accelerometer coherence was much better, so on 8-16-15 it was mounted on the 
top of the northeast pier next to one of the 4506s. Measurements were taken again at several points on the ground and the pier, with still no features at 8 Hz. However, an impact on the crossbeam
showed a clear feature in the frequency response at 8 Hz. To characterize this response, a full set of measurements was taken around the floor and along the pier and crossbeam. Results were
consistent and key measurements are outlined. Full results and files are also available on the SVN at https://svn.ligo.caltech.edu/svn/seismic/Common/PierMotionStudy/EXH1/20140816.

Following these measurements, the 8340 was moved to the crossbeam and a measurement sequence covering the full north side was created to examine floor motion and mode shapes of the structure. These measurements
were completed and further analysis will follow. More extensive measurements of all four piers will also be completed.

no restarts reported

model restarts logged for Fri 15/Aug/2014
2014_08_15 13:20 h1iopsusauxex
2014_08_15 13:20 h1susauxex
2014_08_15 14:06 h1ioppemmx
2014_08_15 14:09 h1ioppemmx
2014_08_15 14:21 h1ioppemmx
2014_08_15 14:22 h1ioppemmx
2014_08_15 14:23 h1ioppemmx
2014_08_15 14:25 h1ioppemmx
2014_08_15 14:27 h1pemmx
2014_08_15 15:12 h1ioppemmx
2014_08_15 15:13 h1ioppemmx
2014_08_15 15:15 h1ioppemmx
2014_08_15 15:17 h1ioppemmx
2014_08_15 15:20 h1ioppemmx
2014_08_15 15:21 h1ioppemmx
2014_08_15 15:21 h1pemmx
2014_08_15 15:22 h1pemmx

no unexpected restarts. Recovery of h1susauxex after power outage, testing channel access parts in rcg2.8.5 on h1pemmx.

J. Kissel, T. MacDonald

We've whacked on the HEPI piers and surround floor some more today. We think we finally have a good combination of hit locations, hit strengths, and accelerometer locations that we're measuring the real flagpole motion of the pier at 8 [Hz]. Lots of plots, data, and analysis to come (as we know it's torturous to get data off the B&K system). Glancing at the rotation sensor signal, we found it had rung up to +/- 500 [nrad] during our activity and a visit by Robert, so we did the gravity dance a little bit, such that it now is moving +/- 250 -- Krishna is much better than us at this. We've left the end station as of 2014-08-17 8:00p PDT, or 2014-08-17 03:00 UTC.

After roughly 10 hours of pumping we reached a pressure of 20 Torrs.

Alarm handler was complaining about LVEA dust monitor 2 and 5.

In the attached 2-days plot, I see nothing today that was larger than on Friday, except there was a one time glitch for dust monitor 5 at around 6AM today which immediately got back to zero-ish, so I acknowledged both of the alarms.