As expected, opening GV6 after being soft-closed for >3 hours caused PT114 & PT124 to alarm from the release of unpumped gate annulus accumulated gas.  Alarm threshold 1e-7 torr.  Leaving GV8 soft-closed for crane activity over XBM tomorrow.

Updated cabling in SUS Test Rack (Corner station) per D1001725-V7. Changes are to add Duotone FB to DAC and ADC cards. Changes made were swapping cables H2:SUS_BS-92 and H2:SUS_ITMY-24.

Summary:

Main activities in the LVEA were venting the Y-Beam Tube Manifold (for feedthru work on BSC8) and bringing in our new big Mode Cleaner Tube (see attached).

Activities:

• Crane inspections in the LVEA
• 9:01Snow Valley here for Ski
• 9:14-9:22 Filiberto updated SUS Test Stand Cables
• 9:25 Kyle starting on Vent
• 10:28  h2 daq reboot
• 11:00 electrical inspector to work with Ken Dyer
• 11:05 Beam Tube arrives (truck escorted around & not contacted via gate phone)
• lots of access alarms at the H2 PSL
• 2:10  Stoneway electric here for delivery for Ken
• 3:00 beamtube brought into LVEA (caused some DST7 Alarms)

Contractors:

• Snow Valley met with Ski
• Stoneway & an electrical inspector worked with Ken

Attempting to fix the overall pitch problem of the main chain.  After working through course pitch adjustments at the Top Mass, we in-fact found a differential pitch between the Top Mass and UIM.  After a few hours of fussing with UIM masses we discovered that one of the UIM wire clamps was clamped down on the free end of the wire which was bent under the clamp.  So we lifted and lowered masses, removed the clamp, fixed the wire, and still found the differential pitch was hanging around.  So, now we are installing the new redesigned UIM pitch adjusting turrets to see if they help us any.  We might try swapping wire segments out altogether but we're not willing to do that just yet.  Mid-diagnostics, Jason is setting up to measure if the PUM-to-Test Mass pitch differential is still 3.6 mRAD.  

After SEI ISI Balancing finished mid afternoon, we embarked on:
 - Lacing the ESD and UIM/PUM BOSEM cables up the reaction chain
 - Reattaching the suspension wires between the UIM and Top  Mass
 - Suspending the chains

The good news - The Monolithic hangs, so fibers survived round 2 of installation activities!
The bad news - The Main chain is hanging with a pretty heinous pitch up.  But, the pitch is maintained all the way up the chain, so we only need to adjust the course pitch adjusters at the Top Mass.  This step takes some time, so we bagged for the night.  Sorry, testers.  We'll have to have another round of mechanics on Monday before BOSEMs tell you anything useful.

The ISI was left locked, but the masses are mostly free (M0 Top Mass is clamped a bit to correct for the pitch).

Bland, Sadecki

A draft of the h2iscey model has been committed to the cds_user_apps svn:

isc/h2/models/h2iscey.mdl

All of the I/O is there, and the alignment control is blocked out.  Still a lot more work is needed.

I'll keep working on this remotely, and we'll coordinate on getting it running once the EY IO chassis is up and running.

Doors and dome were removed from the chambers first thing this morning. The support table was removed from HAM-9 and preserved clean to be used as a jig for HAM-11/12 support tube installation the time comes. Mark Layne went in through HAM-9 to assess and document the condition of the chambers. He noted that there was quite a bit of writing on the interior of the HAM. (We'll see if it measures "down" to the standard set by aHAM-11: aka iHAM-12 which MZ described as looking like a "graffiti-ed underpass".) There was also plenty of detritus of various kinds on the floor of the HAM as well as fibers on the support posts.

(Radkins, Robinson, Warner)

BSC 8 had Stage2 ballast mass removed and was floated and balanced. Some minor adjustments were required to Stage1 trim mass, and multiple CPS's needed regapped, mostly on Stage2. The system was left in a locked state for SUS cabling work, but should be otherwise fully functional. The weight distribution on Stage2 is ugly, but will need be revisited after the cartridge install because all of the keel mass will be removed to facilitate the lift.

The h2susb6 IO chassis seems to be missing a dac (dac_4).  lspci is listing 4 dacs, but 5 are needed for controls of ETMY and TMSY.  See the SUS ETM controls wiring diagram (D1002741).  h2susetmy uses dac0, dac1, and half of dac2 for OSEM coil drive signals, h2sustmsy uses half or dac2 for it's OSEM coil drive signals, and h2susetmy uses dac4 for it's ESD drive signals.

The new epics gateways installed to support CA connections between CDS, H2FE and H2PSL LANs enabled an EPICS "loop back" whereby on any LAN both the local IOC and the gateway responded to connection requests. Using the "signore" server ignore argument, these loop backs should now be eliminated.

(Sadecki, Bland, Buckland, Garcia)

Today we:
Attached the 4 Stay assemblies to the FMy (modification and recleaning complete), dog clamped them down and torqued the bolts to spec.
Verified magnet polarities of all magnets on ITMy.
Sorted, checked function on medm, and connected the 12 ITMy Top BOSEMs (model/code fixed).
Finished the ITMy cable routing.
Added ITMy Top Stage split lock collars.

And FINALLY,
Mated the ITMy Monolithic lower suspension to it's upper structure under the BSC8 ISI!

Attached the sleeve (with only a few bolts, because we only want the payload right now and will maybe remove it again).
Attached the LS cross braces.
Attached Vibration Absorbers (with only a few bolts as these will be removed and replaced again).

Again, the FMP tooling helped to ease the process.  The mating screws for the Lower to Upper structures  and the Sleeve are difficult to attach so we're considering looking into opening up some holes on the future units.

Full picture collection from today is on ResourceSpace:

https://ligoimages.mit.edu/?c=770

Tomorrow, the SEI crew will add ballast mass and rebalance the table.  We will then work on lacing the cables up the suspension, reconnecting the wire segment between the UIM and top mass, and freeing the masses into suspension.  Then we'll need to attach and align the BOSEMs before we can take transfer functions.  A tall order for the last day of the week.

Terry and Christina got second cleaning taken care of this morning. The ICC crew removed bolts from the dome and the appropriate doors, moved the purge air from HAM-9's west door and attached it to the BSC, and started removing feedthroughs and viewports. Mark asked John to have a look at a couple of viewports that had "discoloration" on them: one turned out to be something on the glass surface that was readily removed and the other one seemed to be a spot where a laser had gone astray.

On another note, Rai and I spent some time in the optics lab looking at a couple of possible methods for documenting/quantifying particulate depletion on chamber surfaces.

I made a couple of minor tweaks to the h2susitmy model. Most of them were entirely cosmetic, but I did change a couple of the goto/from names to be a little more generic, mostly just to make things easier when porting the model to other quad suspensions (etmy, itmx, etc.). I recompiled the model to confirm that everything was kosher, and restarted it on h2susb478. The seemed to come back up fine after the restart...

However, during the restart I received a flood of the following messages:

CA.Client.Exception...............................................
    Warning: "Identical process variable names on multiple servers"
    Context: "Channel: "H2:SUS-ITMY_R0_COILOUTF_F2_SW1R", Connecting to: 10.201.0.28:56833, Ignored: 10.201.0.180:5064errlog = 31 messages were discarded
Channel: "H2:SUS-ITMY_R0_COILOUTF_F2_Name03", Connecting to: h2susb478:56833, Ignored: 10.201.0.180:5064"
    Source File: ../cac.cpp line 1209
    Current Time: Thu Oct 13 2011 17:33:47.977845564

I'm not sure what's causing this issue, although I note that Cyrus and Jim were working on EPICS gateway stuff earlier today....  Still investigating the issue...

Previously, we had no guidelines on how to connect our 25-pin cables (they are used for the Trilliums [D1100152] and as Extensions for the GS13s/L4Cs [D1100153]).  These cables have Peek connectors on both ends, but one end is nickel plated; we weren't aware of an orientation for these cables, so we randomly had Peek/nickel plated connectors connected at the feedthru. 

We were notified that the Peek connector must be connected at the feed-thru.  This morning (4) of our cables were flipped around for the BSC8-ISI.  BSC6-ISI is also connected correctly as well.  Attached are photos of the wrong connectors plugged in at the feed-thru and the right ones plugged in.

The ETMY SUS model (h2susetmy) has been updated and brought into sync with the ITMY SUS model (h2susitmy).

This was done by taking the itmy model, modifying the cdsParameters and subsystem names appropriately, and fixing the IO wiring to match that of the SUS ETM controls wiring diagram D1002741-v3.

NOTE: the DIO stuff was not changed.  As far as I can tell from the wiring diagram the BIO wiring for ETMY is the same as that for ITMY.  However, I'm not entirely clear how the BIO interface works, so I may be misunderstanding the mapping.  I'll try to confirm and post a follow up to this log.

NOTE: the model was compiled and installed but is not currently running.

(Hugh, Jim)

Balancing The System

After the Trillium Installation, the system was balanced today, with the hopes for Vincent to have an assembly to run tests on.

More Cabling Notes

Following up on Greg's cable work, today Hugh & Jim installed the Extensions for the Actuators, GS13, and L4Cs.  From Greg's documentation, we can add these cable serial numbers:

(Corey, Jim, Mitch, Vincent)

Installing/Testing Trilliums

We received a crate of (4) Trilliums this morning, and we immediately installed them into the BSC6-ISI (aka Unit#2).

• Corner1:  s/n 31
• Corner2:  s/n 22
• Corner3:  s/n 41

One of our Trilliums we ended up pulling out (s/n 03).  After it was tested, we were getting ready to bolt it to the Stage1 Floor, but the 1/4-20 bolt had issue dropping through the base flange of the Pod.  We pulled out the pod and visually observed the base flange was slightly rotated wrt the pod.  Enough so, that it was not easy to pass a 1/4" bolt through the hole.  This is when we decided to install #31 here.

All of the Trilliums were passed tests for functionality (Vincent ran 5-10min power spectra), and the pressure sensors were also looked good on all four.

R. Lane, A. Ramirez

Testing ITMY (QUAD 2)
Took the Top Mass OSEM Coil Resistances, Photo Diode Voltages, and LED Voltages today. Took measurements at the connection between the octopus cables (D1000234) and the top mass extension cable. The OSEMS meet the requirements.*

Coil Resistances: 39±1Ω
PD Voltages: 1.01±0.05V
LED Voltages: 0.53±0.05V

	Main Chain
OSEM	S/N	Cable	Coil(Ω)	LED(V)	PD(V)
Face 1	481	695	36.3    1.017	0.554
Face 2	638	695	36.0    1.018	0.551
Face 3	501	695	36.4    1.018	0.558
Left	496	695	36.0    1.017	0.551
Right	499	698	36.5    1.018	0.558
Side	445	698	36.7    1.017	0.558

Reaction Chain
OSEM	S/N	Cable	Coil(Ω)	LED(V)	PD(V)
Face 1  471	698	35.9	1.018	0.553
Face 2  484	698	36.4	1.018	0.554
Face 3  472	707	36.9	1.016	0.554
Left    630	707	36.8	1.017	0.562
Right   466	707	36.7	1.019	0.558
Side    415	707	36.0	1.018	0.559

*The requirement for the coil resistance to be 39±1Ω was defined at LLO using "extra long" non final cables. This requirement is not sufficient to determine if the resistance is within standard. I will inquire with the correct authorities to determine what the new value should be for the in-vacuum final cables. However, they do meet the tolerance of ±1Ω. We took the measurement at the octopus cable, not at the vacuum feed through simulator as specified. We did not have the cables available. Although this should not add more than a few tenths of an ohm to the final resistance and would not make up the difference.