- ICC in BSC6
- Some high dust counts by H2 electronics/PSL area (see eLog entry)
- Electrical work continues at EY
- Dome being replaced on BSC6
- Welding in LVEA

Laser Hazard Situation:

Today, we were in laser hazard for the entire day. An SOP is being designed to allow for modified laser hazard in the LVEA that will accommodate everyone's needs, i.e. Squeezers vs. H2 Install teams. Please communicate your intended work schedule well in advance. Additionally, please communicate your progress and start/finish updates to the operator du jour and MikeL so we can transition most efficiently.

Annotated plot attached. After Patrick fixed the dust monitor in the morning, counts were high at some discrete points, peaking the afternoon.

Note: Dust monitor is located by H2 electronics area, so dust may be caused by systems besides for the PSL.

Look at my recent post about seismometers.  The filename was 2011_09_15_seismometerCheck.pdf.  However, below my post, the filename is indicated as just 2011.  It would be great if more of the filename can be shown because it describes the file itself.

SAT Field cables for ITMY and FMY to be replaced. New cables are routed next to old cables. Swap of cables at rack and SAT Units will be done tomorrow. Old cables will also be removed.

KeitaK, RobertS, RichardM, JonathanB

We noticed that the seismometer FOMs were showing both dubious H1 range data and strange traces (see page 1).  In the 0.03-0.1 Hz band, signals from the same seismometer but different axes should be at similar levels, but p.1 shows that this is not the case. Running RobertS's PEM test spectra (/hanford2/users/s6/dtt/PEMtestspectra/) on the seismometers showed that the VAULT-SEISZ was running a factor of ~20 lower than the other traces and MY-SEISX seems completely dead.

See attached PDF.

TIP OF THE DAY:

The projector machines no longer send minute-by-minute screenshots to blue.  To take screenshots on Solaris, I quote from this amazing page:

To Take Screenshot of a Frame

When logged onto the CDE, open a terminal session and run the command as follows:

sunsolaris# xwd -frame > screenshot.xwd

This will prompt you to select a window (the cursor becomes a +), then it will take a picture of the window (as it appears on the screen), the “-frame” options will have it also include the window managers decorative borders, then the file is converted to png.

Screenshot and Convert togethor

sunsolaris# xwd -frame | convert xwd:- screenshot.png

Unbeknownst to me yesterday, Richard considered the sat amps from Vern loaners until the originals could be modded. That happened in the last 24 hours, so I swapped the modded ones back into their former positions. As part of the mods, the old boxes acquired S numbers, so now we have

M0-F1 to M0-LF: 32007-14, now a.k.a. S1105154
M0-RT to R0-F2: 32007-15, now a.k.a. S1105152
R0-F3 to R0-SD: 32007-03, now a.k.a. S1105153
L1: 32007-08, now a.k.a. S1105151
L2: 32007-06, now a.k.a. S1105150

According to David Stone, all the jumpers were set to "L".

I'm putting this in the aLOG because it is read more widely than the iLOG.

It is clear from the attached plot that the RefCav is behaving completely normally within it's normal ~0.1 degree (!) tolerance level.  However, the alarming is incessant because it is not adjusted seasonally.  It should probably be updated to reflect current conditions.

I replaced the fuse in the break-out box for the dust monitor at location 7 (near previous location of H2 electronics racks).

The ICC crew finished wiping down the lower sections of the chamber this morning. Then the entire chamber, including doors, was gently vacuumed as called for in the procedure. By the end of the day, inspection had been completed. The dome will be replaced on the chamber and FTIRs will be shipped tomorrow. There may be some delay in replacing the door blanks since Clean-and-Bake is somewhat overwhelmed at this point in time. 

Last night at 18:46 local time the GPS time rolled over from 9 digits to 10 digits. The DAQ system was checked and no problems were detected. The frame writers did not lose any frames.

The cabling was completed today for the full FMY suspension system. The M1 - F1, F2, F3, & LF OSEMs were connected and their outputs verified on the medm screens. The cable of type D1000234 - 125" has a S/N of 900, which is then connected to an extension cable of type D1000225 - 199" with a S/N of 1104783. PEEK cable ties were used to consolidate the 12 cables from each OSEM into a bundle that runs up against the sleeve of the FMY. This bundle is then clamped to the BSC-ISI Optical Table using the new Cable Brackets.  The feed-through positioning did not allow for a "clean" path for the extension cable for the normal M1 - F1,F2,F3,&LF slot, so instead the "SPARE" slot was used in the feed-through.

In yesterday's aLog , the M2 OSEMs and the "RT" and "SD" OSEMs of M1 were connected and verified on the medm.  After unplugging and rearranging cabling today, the OSEM cables were reconnected but the M1 "SD" output in the medm screen did not read a "real" signal.  Reseating of the cable to the OSEM output was tried, but no difference in the output was noticed.  This is an issue to investigate after the SEI crew has completed re-balancing the ISI.  

I swapped out the satellite boxes in the test stand for new ones provided by Vern, with all the latest fixes from G1100856 according to stickers on the front:

Gain resistors R1012-R402 changed to 121K
Inductors L101-L401 changed to 100R resistors
Capacitors C107-407 removed
ICs IC551 and IC552 changed to OP27
(No offset resistors as per experimental change on some boxes.)

I opened the boxes and triple checked that all the jumpers were set to "L" (=LIGO=photoconductive mode=10 V bias). 

The old and new boxes were

M0-F1 to M0-LF: 32007-14 -> 3202-012, a.k.a., S1100124
M0-RT to R0-F2: 32007-15 -> 3202-004, a.k.a., S1100125
R0-F3 to R0-SD: 32007-03 -> 3202-026, a.k.a., S1100126
L1: 32007-08 -> 3202-018, a.k.a., S1100127
L2: 32007-06 -> 3202-034, a.k.a., S1100129 (yes, not 128)

The new boxes have not yet been tested against actual OSEMs - hopefully in the next day or so.

Today, the cabling for FMY was mostly completed with the exception of the M1 - F1, F2, F3, LF outputs.  The M2 and two of the M1 outputs were connected and confirmed via the medm for the input filters.  The clamps to the BSC-ISI optical table will be installed tomorrow morning and re-routing of the extension cables will continue.  The work today established the correct cabling from each OSEM sensor to the readout signal in medm.  

M2 (UL, UR, LL, LR): 
The cables from each OSEM (D1000234 - 125") were then connected to the extension cable (D1000225 - 199") that went to the new SUS feed-through plate.  For the cable of D1000234-type, the S/N is 902.  The extension cable S/N is 1104781.  

M1 (RT,SD):
The cables for only the RT and SD OSEM were connected and confirmed via the medm readout.  The D1000234-type cable S/N is 901.  The D1000225-type cable has a S/N of 779.  

M1 (F1,F2,F3,LF):
The SUS feed-through plate on the mechanical test stand will need to be adjusted to accommodate the extension cable (D1000225 - 199").  The plate did not leave enough room to squeeze this cable in without rubbing against the (dirty) Test Stand.  

As a test, the H1 PSL dust monitor has been changed to a Met One 6000 series model. Both the vacuum line and particle intake lines were swapped. I had to make minor changes to the CDS code, and it seems to be working.

First vacuum was completed. Wipe down progressed through the upper chamber, upper fins, lower fins, and ring. That leaves only the chamber floor to be wiped down. By tomorrow, I expect that second vacuum will be finished and inspection can begin. That puts us on pace to be out of the chamber by Thursday at the earliest and Friday at the latest. (Go team!)

SUS work on BSC8 test stand
Electrical work on air conditioning for electronics building is nearly complete.
delivery pickup
Unifirst delivery
Praxair delivery to CP8
Filiberto made cable length measurements in the LVEA
Michael R. changed H1 PSL dust monitor to the new Met One 6000 series model. I updated the code again.

Plots of dust counts > .5 microns attached. The dust monitor at location 7 (near the previous location of the H2 electronics racks) seems to have disconnected. The dust monitor at location 6 (the H1 PSL diode room) has been disconnected for about a week or two.

BBland (for Bartlett, Sadecki, Ramirez, Garcia, Cook, etal.)

This week, the crew:

1) Made the M0 PUM loop.
2) Prepped the M0 chain via moving it to it's parking spot in the LVEA fiber room where it won't be moved for the next few weeks while the monolithic build takes place. Also, we mounted the triple hang tooling and Doug started to setup IAS to look at the hanging dummy PUM.  Note, the TM is still removed so we'll take this first pointing fiducial with the UIM and PUM only hanging (no TM), which is the same state we will restore when we swap in the glass PUM and it's wire loop.
We still need to finish leveling the setup before Doug's first look.
3) Laced the FMy cables (D1000234-125" s/n 900, 901, 902) up the structure and PEEK xip-tied them.  
4) Mounted the newer, functioning version of the pseudo feedthru to the test stand and connected the rack cables.  

We still need install the SRS cables between the 125" and feedthru, which will takes some fussing to mate to the ISI properly.  We'll broker with SEI for more time and guidance on this.

5) Assembled the beginnings of the Table Cable Brackets (3 for this table).

6) Gerardo continued measurements of the crooked ITMy TCP (CP09) in an attempt to find a path forward to gluing the SST prisms onto it.  He reports that this is challenging...

It's redundant to have a user's comment to another user's entry show up both at the top of the "news feed" and be attached to the original entry. Further, a useful model of the old eLOG was to add subentries with related but less important information. So I suggest one or both of the following:

- If the desire is still to have the comment pull to the top of the "news feed," bring the whole main entry back up to the top of the feed, with the new comment attached.
- Or, have the "comment" button create a "sub-entry" that doesn't pop up at the top of the "news feed," but merely attaches to the main entry.

Either way, the comment / sub-entry should stay attached to the main entry, and that's the only place it should show up.

(For an example, I had intended entry 967 to be a subentry to 966)

Often times I would come to a work station, attempt to write an aLOG entry, and find that the web browser has someone else's ligo.org credentials in place (either from recent use or a stored kinit), and I have to close and restart the browser before continuing, or run kdestroy. One should have the ability to log out, or at least have a "Not You?" link that takes you to the home screen, clears the store credentials, and asks for new ones.