Dale shot this curvilinear representation of the LVEA H2 diagonal section showing the absence both input and output mode cleaner tubes, as well as the (temporarily) relocated HAM11 chamber.  HAM11 moves downsteam of HAM12, and is renamed HAM12, in aLIGO.

H2 Input beam tube removed from LVEA.
HAM6 survey work.

Bubba evened the wager count. HAM11 was weighed today with two 84inch doors and two 68inch temporary covers of 3/16 aluminum. There were no internal components for this measurement. Annulus ion pump and power supply were still mounted. Actual weight was 9200 pounds (winning number was 9210)

H2 input beam tube was removed and placed on the stands on the LVEA floor.
Ski and a visiting contractor worked on the air handler systems.
Betsy took a SUS delivery at the staging building.

I have changed the holding time to 1 minute and the sampling time to 1 minute for all the dust monitors in the LVEA in an attempt to resolve a problem with them getting stuck on hold.

8:36 Unifirst delivery
~11:09 Praxair filled CP1 and CP2

Richard investigated the tripped breaker for the LDAS chiller
Dave tested the vacuum system email alarms
HAM 11 was picked up and moved next to the Y arm! (pictures attached)

Measured with the Optical Level the vertical distance from the TestStand Stage0 Supports to the top of the Optical Table.  This gives us an idea of how tall the assembly is wrt design.

Using the Wilde Optical Level we averaged the four ends of the HAM Adapter Bars Height.  These sit between the Stage0 bottom and the Test Stand.  This gave us an average height of the bottom of the Stage0 mount.  We then shot the top of the Optical Table at four corners and the middle.

The average height difference was 780.8mm; the design height given by DCoyne PerComm is 780mm.

So not bad.  Attached is the field note.

All aligo and iligo CDS machines with ports open to GC were patched this morning. If a reboot was required to complete the patch it was done so.

machines patched are: ruby,silverstar,ilog,apache,sugarloaf,strawberry,cdslogin,cdswiki

(Corey, Greg, Hugh)

In preparation for installing the HEPI Assemblies on an upcoming BSC, Greg & I set the HEPI Foot to it's "nominal position" for four of HEPI Assys (to be installed on BSC7).  On the HEPI "Cage", there is a part/serial number marked on the base.  The four we worked on were Serial #'s:  54, 77, 51, & 45.

I took (3) plastic containers from the ISC Optics cabinet near the H1 PSL into the Optics Lab (container ISC-18 (various optics), ISC-19 (1" and 2" newport mounts) and unlabelled with bases and posts). We will use these parts to set up the Reference cavity for the H2 One Arm Test (H2OAT).

We will keep track on what we took from the containers, to keep the stock list up to date.

Also, I took the 'spare' 21.5 MHz modulator from the cabinet from the cabinet labelled 'Camera', which has a list on the door with 'Who' took 'What' and 'Where' with 'Date'. So I listed the modulator and my name on it as well. I guess I will double check if we can use this modulator.

Still not sure what the beam height on the table should be, as the RF diode is at ~3" height (unless there is a magic spacer). I guess the 'soon to come laser' will probably set the standard.

I have created a new machine which sends EPICS alarms as text messages to cell phones. It is a GC machine which is also on the iLIGO CDS network. Its names are:

It is running a modified version of the email_alarms.pl script, ported from solaris to linux and using burt in place of caGet. This system can send emails directly, even to Sprint phones. So it is not dependent upon the robinson email proxy which the old system needed.

We completed the Quad 3 rough alignment for both chains. Set up the optical lever and started on the fine alignment. Found the Reaction chain yawed relative to the Main chain and the structure, and adjusted the Top Stage blade angles to remove the yaw. We will work on setting the pitch tomorrow.    

~9:45 fb0w was re-booted 

10:30 - Rodney to Squeezer area to flush out eyewash station

Hugh and others prepping for HEPI install

11:35 – Dave reports that fb0w is stable and rebooted the machine to begin writing frames again.

12:30 – truck for freight pick-up from Doug

Flushed all of the eye wash/shower stations in LVEA, LSB Optics lab and Warehouse

H1 DAQ system.

LDAS were down due to  cooling issue in their server room. While the disk system for fb0w's frames were not available, fb0w was ran in partial mode (real time data only). LDAS have recovered their disk system and fb0w is now writing frame files again.

The data gap on nds0 is

08:50 H-R-982947008-32.gwf
11:37 H-R-982957024-32.gwf

For data in this period, please use nds2.

RO unit shut down in auto from level control

The aLOG will be rebooted tomorrow after some routine system maintenance.

The reboot should happen at 10am Pacific time 1 Mar 2011.  Please save any entries you may be working on before that time.  The down time is expected to be a minute or two.