Nothing major today. Toyota forklift moved out of the high bay and craned over the beam tube. Cyrus working on phone systems at the end stations.

No major work today. We were also expecting several large deliveries for SEI (Hugh, to go to the warehouse) but none of them arrived today.

Ice accumulation on exposed portion of LLCV needle valve needle not applicable to CP2's recent misbehaviour.  Instead, the pneumatic actuator box required thawing via the heat gun.  As found, the needle was stuck in it's nominal position (~15% open) and wouldn't stroke when >nominal open settings were selected (in manual control mode) or stroke closed with the instrument air valved out.  With the actuator thawed, now the needle strokes freely through 0-100% settings.  

CP1 is working at this time but was probably experiencing a similar problem yesterday.

Probably ice accumulation on exposed portion of LLCV needle valve preventing valve from stroking closed (or not).  I'll be in today anyway for unrelated reason.  I'll investigate CP1 and CP2.

CP1 and CP2 (corner station) "out-of-whack" for some reason. Am monitoring from home.

I Turned on one stage of heat as it was getting kinda cold out there.

Removed all components for RM and BS optical levers.
Removed most of the components for FMY and ETMY, piers still need to be removed.
Also removed laser boxes for ITMY and FMX.

After the removal of optical lever components, the uncovered view-ports were covered with view-port covers, bright yellow ones.

I tried to get all the seismometers into the frame, but I'm hitting
a recurrence of the 5579 RFM problems which means I cannot get all the
ADCUs up and running. It is not reproducible, I was able to run h1adcuex
earlier, but cannot get it running now.

So what is running:
h1adcuey,h2adcumx,h2adcumy

What is not running (stuck at waiting for RFM data)
h1adcuex,h1adcusus,h1adcupem.

I tried the usual power cycle of:
5579RFM vme crate
h1dcuepics
h1awg0
h1iscex and the stuck adcus

but to no avail. So will run for now with just 3 of the 6 seismometers going.

Saw smoke at end of X arm, Gerardo called it in, this is a controlled burn by hanford fire dept.

photo shows the smoke.

Here is a picture of the X-arm, the vit plant is beginning to dominate the view.

Couldn't remote login to blue on Saturday (Christmas day).  Still couldn't remote login on Sunday morning->Came on-site to status 80K pump levels etc., Dave B. already on-site.  Had power loss Friday morning->Restarted MTPs @ X-end and Vertex-OK now->Toured buildings, chiller yards, LN2 dewars, Fire pump room, water room etc->Vacuum/VE OK.  Found VFD controller for "Supply" fan on AHU-2 in LSB had tripped->Reset but VFD tripped on "OVERLOAD" shortly after trying to spin-up fan->switched to "BYPASS" and let controller spin-up fan then switched over from BYPASS position->OK now.  

Misc.->CP7 dewar vapor pressure still 0 psig->Adjusted economizer regulator adjusting screw 1 full turn cw.  

There is no data between these two times due to the site power glitch:

Dec 24 07:11 H-R-977238656-32.gwf
Dec 26 13:44 H-R-977435040-32.gwf

We had a 3 second power glitch at 07:11 Friday 24th December 2010.
LDAS cluster rebooted itself. Some GC servers needed restarts.

On the iligo CDS system, I had to restart fb0c, fb0w, nds0,
silverstar, apache, wiki, hanford5, h0epics[0-3] projector[0,1]

On the fmcs system I have to restart both HP PCs in the control room,
control9 and the fmcs epics software.

Toured through Mid and End buildings, chiller yards and dewars.  

Vapor pressure for CP7 LN2 dewar still 0 psig->Fully closed economizer regulator adjusting screw, tapped regulator body, turned out adjuster screw 6 turns ccw.  Also, closed QDP80 shaft purge (LN2 boil-off) valve at QDP80.  

Leaving early, but this is what's happened so far

Gerardo at MY uninstalling the optical lever
Oscar baling tumbleweeds on the x-arm
RO water sampling

Kyle, Ski, Chris, Joe-> Hung HAM12 South and North doors.  

Kyle->Adjusted Diagonal Volume's purge air setting (all doors on, 7 with only (4) bolts).  

Kyle->Valved-out and shut-down GV10 annulus aux. pump cart.

Kyle->Replaced 0-100 psi gauge at Y-end LN2 dewar (damaged dial face).  Also, noticed that 2 of 2 gauges indicating 0 psi for vapor pressure (see problem following last LN2 delivery)->Closed economizer (vapor pressure regulating) valve 1/2 turn cw.  Note steadily increasing %open response for CP7 LLCV.  Nearly 100% open.  Will loose ability to control CP7 level without aid of some vapor pressure to add to the liquid column weight.

We went into HAM 12 today for the purpose of trying out the modifications to the rotary tool and funnel for collecting freon samples. (We were also hoping to take some more "legitimate" freon samples today but sample bottles did not arrive.) 

Report on rotary tool:
1. Housing modifications (housing was split down the middle) worked well: the housing was easy to take apart/put together and speed could be changed without dis-assembly.
2. Stem (replaced the chuck) worked very well.
3. Fabric sock needs work: still did not allow enough "play".
4. Vertical brushing does not seem to generate as much particulate as horizontal brushing.
5. Cup brush lost a bristle today.
6. Current bush does not allow tool to be used to clean close to "fins".

Report on funnel:
1. Horizontal orientation seems easier to use.
2. Radius of curvature on the rear wall of the funnel allowed closer contact with chamber wall.
3. Handle allowed pressure to be applied to increase contact between chamber and funnel wall.
4. Thinner metal seemed to make a difference as well.
5. We collected ~80% of the freon that we poured in the trial run.
6. We are likely to add a valve to allow collection in chamber but recovery in the staging area.

Misc.
1. We tried brushing near a "fin" with a stainless toothbrush which cleaned the chamber wall effectively but generated high particle counts.
2. We ran the external purge air unit with the output ducted to a HEPA filter.

I will post some official report on the DCC that includes pix.

Kyle, Zack, Rodney->Hung BSC6 South door.  

Kyle->Torqued BSC6 South door bolts, pumped BSC6 volume down to 0.5 torr then valved-out pump (for overnight).

Note: Inner O-ring on spool connected to GV10 leaks into annulus.  Thus, while BSC6 volume remained vented an aux. pump cart was used to prevent the GV10 annulus ion pump from becomming overwhelmed.  "Roughing" out the BSC6 volume will allow the removal of the aux. pump cart from the GV10 annulus piping. This is a "safer" configuration for Y1 during the Holiday break.  

Note: PT210 gauge pair (mounted on BSC6 dome) are not connected to CDS system.  Any pressure indication for these is "bogus".

Today's main tasks:


 BSC6 Cleanup
 HAM12 Cleaning Tests


Other items to be documented by their task leaders.

There will be a small amount of maintenance on the aLOG tomorrow.  This is an upgrade to some auth project (LIGO.ORG) infrastructure.

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Thank you for your patience.