Kyle, Gerardo 

0900 - 1100 hrs. local -> In and out of LVEA, used Main Crane to "fly" leak detector over YBM.  

Dissatisfied with the slow recovery of the HAM11/HAM12 annulus system, we decided to do some unscheduled (no work permit) helium leak testing -> We found a minor leak on a conflat which was mitigated by torquing the flange fasteners but were surprised to discover several very loose chamber flange bolts, i.e. we could visually see the bolt shanks between the flanges!  In total we found (4) adjacent bolts on the flange connecting HAM11 to the OMC adapter spool to be very loose and (9) adjacent flange bolts that we could spin easily with our fingers on the flange connecting HAM12/septum/HAM11 -> these were torqued using twentieth century "old school" wrenches after we were unable to find a cell phone app.  

There are (3) pump carts running in the LVEA over the weekend, (2) at HAM11/HAM12 and (1) on the SW corner of BSC4.

The web page displaying detailed vacuum medm screens has been modified to show old and new medm screens for the site overview and LVEA.  

During the installation of new vacuum controls, some information is available on the old screens, some on the new.  For the site overview and LVEA, the new system screens are shown to the right of the original screens.  This is a temporary display change, once the new controls are installed the medm screens will be updated and the web page will be rearranged again.

TITLE: 04/22 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: Got through initial alignment, then was immediately halted by ISC_LOCK trying to get the ETMX ESD to function.  After finding the last remaining person on site (Kiwamu!), he agreed to drive to EX to try and reset the ESD driver.  He discovered that it was not a problem with the ESD driver, but an issue with ISC_LOCK not checking all the channels it needed to to get the ESD up and running.  Kiwamu edited the ISC_LOCK guardian to check that the requested DC bias was not zero.  Then, just as I was starting to continue with locking, there was another 6.0 EQ in Ecuador (haven't they been through enough already?).  Kiwamu suggested that with no one else here and the EQ ringing us up over 1 um/s, we should call it a night.
LOG:

23:51 Dave and Jim restarting SUS ETMX PI model

2:45 Kiwamu to EX looking at ESD driver (He noted that he was unable to open sitemap on one of the workstations at EX)

3:10 Kiwamu back

3:45 Calling it a night with the seismic plot going through the roof
 

Sheila, Matt, Jenne, Travis, Kiwamu

We went to ISCT1 because we were not finding the beatnote even when we moved PR3 back to its old alignment and we had aligned the X arm using WFS and the camera.  It turned out that the COMM beatnote diode was saturated, so we reduced the power using the half waveplate and PBS in the SHG path.  We realinged the beams, and ended up with a beatnote power of about 4dBm.  

We might need to readjust this once we have a good alignment of the full IFO to get a good reference.

Also, it seems like we have less DC light on AS AIR, so we might need to adjust its alignment again.  To get through the SRY alignment, I lowered the threshold for SRY triggering from 30 to 20.  

Just FYI.

Even without ISS, during O1 the 1st loop diodes didn't rail, but they do now. The power on these diodes seems to be the same as before (I assume Peter and Jason adjusted them).

Attached left is the trend of the past 26 hours. ISS first loop was on at first, but is off right now. You can see that the first loop diodes seem to be railing without ISS.

Attached right show the same channels, but from O1 when ISS first loop was off (seems to be related to ISS investigation in alog 24171).

If you compare the DC level of PDA and PDB from O1 against the recent trend when ISS was on, it seems like the DC power on the diodes are the same as before. This is not a digital filter issue, there's no digital filter on these channels except a calibration factor, and the calibration factor didn't change in the filter file. Dewhite is applied after PDA and PDB output in PDA_REL and PDB_REL channels.

model restarts logged for Wed 20/Apr/2016 DAQ restart of VE-MR work. New susetmxpi model, unstable fw's
2016_04_20 08:33 h1fw1
2016_04_20 13:04 h1fw0
2016_04_20 13:54 h1broadcast0
2016_04_20 13:54 h1dc0
2016_04_20 13:54 h1fw0
2016_04_20 13:54 h1nds0
2016_04_20 13:54 h1nds1
2016_04_20 13:54 h1tw1
2016_04_20 13:56 h1fw1
2016_04_20 14:09 h1susetmxpi
2016_04_20 21:03 h1fw0

model restarts logged for Tue 19/Apr/2016 Maintenance day, upgrade of VE-MX, very late start of fw1. unstable fws.
2016_04_19 09:06 h1fw0
2016_04_19 12:01 h1broadcast0
2016_04_19 12:01 h1dc0
2016_04_19 12:01 h1fw0
2016_04_19 12:01 h1fw1
2016_04_19 12:01 h1nds0
2016_04_19 12:01 h1nds1
2016_04_19 12:01 h1tw1
2016_04_19 20:40 h1fw1
2016_04_19 21:02 h1fw1
2016_04_19 21:14 h1fw1
2016_04_19 21:25 h1fw1
2016_04_19 21:54 h1fw1

model restarts logged for Mon 18/Apr/2016 ETMXPI model change, unstable fw0
2016_04_18 07:06 h1fw0
2016_04_18 11:01 h1susetmxpi

Some questions about look-back times for framed data served by our internal NDS servers have been asked recently, so for the record here are the current look-back times for each type of frame

data was obtained by the script /opt/rtcds/userapps/release/cds/h1/scripts/report_daq_framewriter_lookback_times.bsh

TITLE: 04/21 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Recovering
INCOMING OPERATOR: Travis
SHIFT SUMMARY: PSL work looks to be done, now trying to recover the IFO
LOG:

15:00 JeffB to LVEA to lock 3IFO cabinet, back 15:15
15:00 PeterK to PSL Jason at 15:45, out 17:30
15:30 JeffB and Fil to Diode room
15:45 Ed to LVEA to take a picture
16:00 JeffB to CER/Diode Room
18:30 Peter Jason to PSL, out at 20:00
22:00 Sheila to IOT1

I have restarted the DCS Disk2Disk scripts using their standard configuration, with CDS fw0's filesystem as the primary source of frame data and CDS fw1's filesystem as the backup source of frame data, for DCS archiving of raw (science), second-trend, and minute-trend data. (The primary and backup source of data had been switched temporarily earlier this week due to DCS maintenance.)

The Temperature spike at the ENDY did give the BRS a jostle but it seems to have recovered as has the temperature.

The attached trends are 2 days of the BRSY position, velocity,  VEA temp, ground seismo Y, wind and the BRS DRIFTMON.  To me, the most interesting thing is the ring up in the BRS signals near the beginning of the traces likely related to the seismic spike seen.  I suspect this is a VEA entrance that got pretty close to the BRS (stick to the sides if you can rather than the ends of the enclosure.)  This ring up was still not quite enough to trigger the damping so no too bad and you can see how long it takes to ring down without the capacitive damping.

Also, late in the trends, one can see the winds start to pick up and it kicked the BRS enough to trigger the damping--the velocity hit 3000.  Maybe we'll need to bump up the damping threshold??

Yesterday I installed a Sorenson power supplt into the rack I placed in the closet in the LVEA. It was connected to the fuse block and powered up. After testing for the proper voltages/polarities at the drops, power was connected to the Beckhoff interlock modules and visual confirmation of function was confirmed. The total current draw for 7 of these units, as they currently sit under power, is approximately 600µA. 

It looks like the chilled water pump CWP1 at EY tripped off at ~5:00 pm this evening. For some reason the second chiller has not started so I have restarted the tripped water pump. Hopefully this will make it through the night.

After 15 hrs, CP6 finally registers a real value on the liquid level read back. Currently at 98.5%. I opened the Dewar valve and set the LLCV to 55% (normally runs between 60-65%). I'll be here for a while working on CAD drawings so I'll monitor it.