Indicated He baseline of 4.5 x 10-10 torr*L/sec at start -> 10 second audible blast at each conflat joint and 5 second audible blast in volume between each window and corresponding guard shutter  

Note:  There is still an untested electrical feed-through flange on south side of HAM2 between the support tubes but it is not accessible 

(Betsy, Gerardo)

Both sets of prisms have been glued onto the BS.

Prism SN 41 was used for the ARM side, and Prism SN 40 was used for 180ARM side.

ARM side results:

Measurement from S1 to the fiducial side of the prism, 20.08 mm + 9.99 mm (prism Wp/2)  = 30.07 mm

The measured distance from the centerline of the primary prism to the S1 surface is 30.07 mm, the target is 30.04 mm, so this gives us a +0.03 mm, away from S1 surface, but well within the +-0.1 mm.

180ARM side results:

Measurement from S1 to the fiducial side of the prism, 40.07 mm - 10.01 mm (prism Wp/2)  = 30.06 mm

The measured distance from the centerline of the primary prism to the S1 surface is 30.06 mm, the target once again is 30.04 mm, so this gives us a +0.02 mm, away from S1 surface, but well within the +-0.1 mm.

Replaced the dust monitor labeled 'C' at LVEA location 15 in the clean room over BSC1 with the dust monitor labeled 'P'. The dust monitor labeled 'C' was reporting occasional calibration failure errors.

  We ran Phase 1b power spectra on the India HLTS PR3 this morning. The plots are in the attached files. The results are positive. If the results are approved by the testing group, we will put this suspension into storage. I have added these results files to SVN. 

We installed the ASC IMC model on h1asc0 front end for the first time yesterday (Tuesday). This model is a copy of LLO's latest model in svn, converted from L1 to H1. Wednesday we will re-attach the ASC to the Dolphin Fabric, add the ASC Pitch and Yaw control inputs to the MC1,2,3 Suspension models and add the ASC to the DAQ. We also need to copy LLO's filter module, safe.snap and latest MEDM screens.

The h1ascimc model required a new QPD common model in isc/common/models. This file is used by the Suspensions systems, so we verified that the change did not change the main QPD part but added new QPD-with-whitening parts not used by suspensions. However we think the h1iscey model may need rebuilding.

Gate valve 18 was soft closed at 3:58PM and open again at 5:45PM

Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot from approximately 6 PM Jan. 14 to 6 PM Jan. 15. Also attached are plots of the modes to show when they were running/acquiring data. The dust monitor at location 15 should probably be replaced. It has alarmed a number of times with a calibration failure.

Got corner4 (NE) HEPI L4Cs leveled today.  Again aggregate motion is very small; no translation or rotation larger than 0.001" or 0.02mrad.

WHAM2 HEPI is ***UNLOCKED***

Filiberto pulling cables to IOT2L.
Corey to end Y to look at ALS table enclosure.
Tumbleweed bailing between mid X and corner station.
Jim B. to mid X to connect PEM channels.
Mid X PEM model built and started. Channels not added to DAQ (waiting on channel names).
ASC IMC model built and started. Channels not added to DAQ (waiting on check of data).
Apollo to move clean room from BSC5 to A-1E adapter spool for mounting viewports.
Apollo to move north side of BSC1 work platform away from the chamber to facilitate SEI work on support tubes.
Reverse Osmosis alarm.
Dust monitor 15 calibration failure alarms.

11:00 Hugh to work on HAM2 HEPI L4C leveling.
16:00 Rai soft closing GV18 for RGA measurements, plan to reopen around 17:00.

The h1pemmx computer has been started with models to collect mid-x seismometer, vault seismometer, and vault magnetometer data.  As soon as channel names are decided, the channels will be acquired.

Mark B.

Travis reports that he found some blade stops touching on the BS, so I'm starting another round of DTT TFs for the BS.

Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot from approximately 6 PM Jan. 13 to 6 PM Jan. 14. Also attached are plots of the modes to show when they were running/acquiring data.

The HEPI was unlocked, Corner 1 relocked, Horizontal Actuator disconnected etc, L4C Leveled.  Reassembled, Vertical L4C leveled, Corner 1 unlocked & positioned checked.
Upon first unlock, lock stress unloads and IPSs read larger numbers.  But in aggregate they tend to counter act one another and motion is very small: 0.0006" +X, 0.0018" +Y & 10urad.
After completing the job however, Corner 1 Horizontal IPS is possibly a bogus number since that Actuator was disconnected.  If I ignore that possibility though, the motion is still pretty small: 0.0019" +X, 0.0008" +Y & 32urad.  Dang those numbers look too good, I better check my spreadsheet eh!

I left HEPI ***UNLOCKED***

Jim and Dave.

We borrowed the modified One Stop card from x1fe3 and installed it into h1asc0's chassis. We started the front end and ran the h1iopasc0 model. 

As an aside, we found that x1psl0 had a non-modified One Stop card, it has been shipped to CIT for upgraded.

• Ken working at end stations installing plastic hose for cables
• Cable installation work on IOT1
• Hugh working on L4Cs by HAM2. The light pipe shutter was closed for this work, making the area laser safe
• Dave and Jim working on rebuilding SEI models
• Cheryl increased the power into the beam tube to 210mW

I adjusted the power in the IO path in the PSL to be 1.1W in front of IO_MB_M3.  The power incident on the top periscope mirror is 210mW.  This increase is necessary to align beams on IOT1/IOT2L...

Mark B.

Travis has corrected an EQ stop on the BS (see 5096), so I'm commencing DTT TFs.