Cyrus R., Richard M., Patrick T.

h0epics2 runs the fmcs, tidal and weather IOCs.

Although the weather and fmcs IOCs appeared to be running fine (I did not check tidal), h0epics2 was nearly unresponsive to log in attempts. When I restarted it, it would not mount /ligo. Cyrus noted that it was trying to mount h2boot, which no longer exists. Fixing this allowed it to mount /ligo. Cyrus took the opportunity to apply the OS updates. Once that was done I restarted the h0fmcs, h0tidal and h0weathercs IOCs. I also started the h0weatherey IOC, which was the reason I had tried to log in to begin with.

Greg / DavidH
At ~0930 we were notified that a cut to one of the TCSY cooling hoses had been observed, and despite there being no leaks, it was decided to remove the affected length of hose near the table enclosure feed-through (cut out). No sharp edges were noticed on this feed-through, however as a preventative measure some clean room tape was applied around this cut out and then also around the two hoses before reconnecting them up. The chiller was operated and no leaks were observed.
The cooling hoses to TCSX were also inspected and no damaged was found. However, as a preventative measure, clean room tape was also applied around these hoses where they passed through the feed-through. It was decided to not disconnect these hoses (to apply tape around the enclosure feed-through) since no damage was observed and disconnection within the enclosure could introduce water leaks.
See attached photos. 

At behest of others -> GV18 will be closed later today

To avoid HEPI tripping on L4Cs, I made a simple script to raise the WD value to 99999 on HAM2 HAM3 ETMX ETMY ITMX ITMY. This task can be automated daily by running crontab on a script machine but this needs a SEI approval !
Script is called ResetL4cwd.sh and lives in /ligo/svncommon/SeiSVN/seismic/BSC-ISI/H1/Common/Misc

no restarts reported.

The pressure is dropping as 1/t^0.87. There is still water diffusing out of
materials. It should be safe to open the gate valve to the trap and the beamtube
for periods of hours. If the pressure drops below 2 x 10^-8 torr when the chamber
is exposed to the trap and the beamtube, the gate valve can be left open permanently.
The plot shows the current trend.

Wanted to check the clipping in Green path at EY. Since EY doesn't have WFS ready, the only thing I can do is to see the QPDs, which is not that interesting, but I asked EX people to do this kind of thing for EX using QPDs and WFSs to check the full green REFL path.

What was done for EY:

• Center the QPDs using QPD servo, and disable the servo (though I could have done this with the servo engaged).
• Hold the SUM output of the QPDs.
• Dither PZT1 or PZT2 in PIT (or YAW), measure the TF from QPD PIT to QPD NSUM.

If there's a clipping there's a linear coupling to NSUM, but it's difficult to get a sense of how large the excitation is. To get that sense, we look at QPD PIT signal itself. Apparently, PIT signal depends on where the QPD is placed (e.g. QPDB is mostly insensitive to PZT1 while QPDA is less sensitive to PZT2 than QPDB is, and this is by design), so we need to pick a good QPD for a given PZT. I didn't mix QPDs as using one QPD looked good enough.

Anyway, this is only with QPDs and thus things are simple, you need to look at QPDB for PZT2 (left top, blue) and QPDA for PZT1 (right top, red). 50dB difference between the beam displacement on the QPD and the NSUM signal. This might be some small clipping or inbalance in the QE or in the transimpedance or maybe some coupling via cable, but the point is, this looks good.

As I wrote above, you should be able to do this using WFS and check the full green REFL path.

In preparation for peeking down the Y arm tomorrow, I checked the video hardware to monitor ITMY (as it turned out that we don't have IY baffle diodes).

Both the spool camera and the BSC camera cans were there and the cables were still coming out of the cans. I asked Filiberto to find if the cables are still routed to the control room.

Something must have happened while I was working on the WFS path, and when I looked at the beat note before returning to the corner station the beat note was -40dbm. (Was -10dbm before).

Changing temperature had almost no effect. Measured the IR power from Prometheus and the fiber, both were good.

Started realigning the path and eventually got back to -16dbm at about 40MHz. Still big, though not as big as before.

Now the laser temperature is 35.6 degree C (was 33.7 before), though to me both of these temperature look perfectly fine.

(Joseph D., John W., Justin B., Sheila D.,  and Gerardo M.)

Attempted to install new ALS shutter, but as soon as we started we found 3 scratches on the viewport (inside side), see photo, John was consulted and the decision was to abort the rest of process, first contact was not applied to viewport, and the rest of the components were staged to finish work tomorrow.  GV7 will remain soft closed until then.

ITMY tripped twice while we were switching blends, guardian brought it back fine

I have built overview MEDM screens showing the EPICS monitor of all PEM fast channels. To add these for CS, EX and EY to the sitemap I had to give PEM two related pull downs. All weather screens are in the right pull down, dust and others in the left.

Currently the BLRMS signals are missing because they have different name suffixes, I'm in the process of adding them.

- 9:00 am, Apollo to LVEA, prep for beer garden transformation.
- 9:15 am, David to LVEA, check on TCS cable short.---> done by 10:05 am.
- 9:30 am, Aaron to LVEA, cable run for photodiode amplifier.
- 9:41 am, Betsy and Travis to Y-End, SUS hardware retrieval.
- 10:14 am, Pablo to LVEA, hunt for a spare VCO.
- 11:30 am, Robert and guests to LVEA beer garden, installation of microphone.
- 1:00 pm, Kyle to Y-arm, open gate valves, not GV18.
- 1:10 pm, Karen to Y-End, cleaning.
- 1:10 pm, Corey and Cyrus to YBM, gigE camera testing.---> done by 1:35 pm.
- 2:00 pm, Apollo crew to LVEA, setup to move items around beer garden, remove stairs, support platforms, etc.
- 2:54 pm, Sheila and Justin to H1PSL laser enclosure, block ALS path for change of shutter.
- 3:15 pm, Joe and Gerardo to LVEA, remove and replace ALS path shutter.
- 3:24 pm, David and Greg to LVEA, TCS plumbing work.
- 3:49 pm, LVEA transitioning to laser safe.

2 days of RGA accumulation data for Y2 Beam Tube.

Files attached are;

Y2accum.txt - time vs ion current

04102014_y2_accumulation.txt - as written by RGA software.

Y2accumCC.txt - Cold cathode PT246

Termperature data yet to come but it has been 80F in the afternoons lately.

The volume under test includes CP4 and CP7 at either end of the two kilometers. GV 18 and GV11 were hard closed for the duration.

Preparations for opening the Corner Station to the Y-end for a few hours tomorrow 

Note: Indicated IP11 alarm is the result of incorrect signal conversion values to CDS -> Actual voltages and currents are nominal for pressure conditions 

(Filiberto, Aaron, Thomas, Daniel)

We installed the baffle PD amplifiers for ITMY. This is a new double chassis, so we replaced the old single unit. This should also fix channel 4 for the ITMX diodes. Previously, channel 4 was connected to channel 3, but now is back on channel 4. The TwinCAT system has been reconfigured to recognize the new channels.

Dave H, Alastair, Thomas, Greg

Quick summary of progress:

TCSX:
Laser was operated for a few hours on Monday with an output power of ~58.5W. Optics have been mounted and placed in position on the table. This table is now ready for alignment.

TCSY:
Optics/mounts have been staged, and are ready for table installation. Cabling is almost complete. Attempts were made on Wednesday to operate the laser/test the output power, however this was unable to be performed due to a fault with the paddlewheel flow meter (amongst other interlock/laser controller issues that are still to be tracked down). Some additional cabling is still to be installed. 

TCSX/Y periscopes have been partially assembled, still to track down one last component. Socket head cap screws with lower profile heads have been ordered, as it was observed that the cap screws for the periscope base sit proud. 

We Left ETMX running over night (it wasn't very windy so this should probably count as a quite time, I need to make a tool that will tell me that kind of thing).

Sensor correction was installed in three degrees of freedom last night and running. This is ground to stage 1, using Ryan's filter which is targeting the first suspension mode at 0.45Hz.

I've attached three sensor correction plots on/off, blue is sensor correction off the other colors are sensor correction on with various gains. The X direction gain ended up at 1 (which is what it was designed to be) Y and Z came out to be 0.6,
which is very weird.

  There are also three performance plots from last night, with the GS13 and T240 curves.  In general we are buried in the GS13 noise above 0.5Hz (red vs green) except at the BSC pier resonance, we do not have the HEPI L4C feed forward filters installed yet. GS13 rY and rX tilt coupling (yellow line) explains most of the low frequency gs13 signal.  There is clearly some room to relax rZ loop to reduce the gain peaking below 0.2Hz

and again none of this is Stephen's fault I can't figure out how to change the login to me

Rich 

Mabey I hope that I now have the correct plots

Since Saturday the ODC for the PSL and (obviously) IMC have looked a little odd. They both keeping reporting very short, quick times when both the systems are not 'good'. These happen throughout the day as you can see by the two attached plots which show yesterday's activities (you can see more of these plots on the summary pages - https://ldas-jobs.ligo-wa.caltech.edu/~detchar/summary/). Just wanted to check you knew about this and if so is this nothing to worry about? Thanks!