In-Chamber Cleaning (henceforth ICC)

The ICC Crew today: Mark Layne, Zack Haux, Chris Soike

We started the morning by inspecting the compressors with John W. and Michael L. The ICC crew had noticed moisture in the air hoses attached to the compressors. After checking the hoses and the filters, John was convinced that the moisture was water condensate and not a threat to our work. He did suggest blowing out the lines both before the beginning and end of work each day so that will be added to the procedure. John and Michael were in agreement that work should proceed.

Tasks accomplished today
-West beamtube dust barrier (iLIGO) installed
-Gaps at the top of north and south dust barriers were filled in
-Condition of chamber documented (pix)
-Pre-work particulate samples taken
-Particulate depletion samples taken
-Soft dome cover removed and soft roof retracted
-2 sections of the collar area cleaned
-Soft door/dome covers re-installed
-Hoses blown out at end of work
-Materials consolidated to provide room for HAM 5/6 door lay-down

Kyle, Gerardo -> Vented Vertex and HAM6

Leaving GV5 soft-closed

Wednesday Ops Log

- Cleanroom moving to HAM5, bolts taken off north door by OMC TT1
- Quad 3 being moved to EY
- Greg to break cement under HAM9 piers because aLIGO piers are slightly bigger than eLIGO piers
- Squeezer electronics being moved to between HAM5 and HAM6
- Gregorio Tellez, Eric Black, and Eric James, inspect HEPI piers in LVEA
- h2adcumy needs to be rebooted and it's MEDM needs to be fixed so that it shows red not black.  Black is ambiguous.
- Reibold, MikeL, MattE to EY for penetration and drilling.  Vacuum cleaner brought to keep dust down
- Kyle vents vertex and HAM6
- Deliver from Conway for Hugh to the warehouse
- Oxarc delivery for Kyle
- Small rodent found under Control Room big table during safety meeting. It crawled under the FMCS workstation and disappeared...it will return, no doubt.
- SUS people working on test stand in the LVEA
- LVEA is currently transitioning to laser hazard.  Keita will lock mode cleaner (?) and Squeezers will work from there.
- MattW will be leading efforts at the lab in EY.  The phone extension there is x175 (posted on white board).

BSCISI #2 Assembly Status

(Corey, Jeff, Jim, Mick V.)

Today consisted of lots of helicoiling and torquing.  One team torqued down the Stage1 Close-Out Plate, while another team (mainly Jeff) worked on helicoiling the Top-Facing Keel Plate.  Once the Stage1 Close Out Plate was torqued down some other Gussets and hardware were installed on the system (such as the Outer Upper Walls for Stage2. 

The Bottom-Facing Keel Plate was installed on the system.  Once the Top-facing Keel Plate was helicoiled, the day ended with us dropping this Keel Plate on it's respective plate.  We now have all big plates on Assy#2!!

A background activity was building the Sensor Assemblies.

Sub-Assembly Status:

• Actuators:  COMPLETE
• Lockers:  COMPLETE
• Flexures:  COMPLETE
• Sensors:  COMPLETE

H2 workstations ligo.org authenticated

Jonathan and Dave.

We have installed ligo.org authentication on all the H2 CDS Workstations in the control room and the LVEA. In addition to the "controls" generic account, you may log in using your "albert.einstein" ligo.org account. Note if you dont already have a CDS account I will need to create your home directory before this will work for you.

Access to CDS from outside of CDS is still strictly controlled and is not ligo.org authenticated. If you need a remote access account, please contact me.

Please email Jonathan and myself if any problems are found with the new scheme.

BSCISI #2 Assembly Status

(Corey, Eric, Jeff, Jim, Mick V.)

Stage2 Work

After part of Stage1 was put on the Optics Table, continued to build up Stage2.  The Mid-Plate was installed, Upper Hex Assembly installed, and then we moved back to Stage1 work....

Stage1 Work

After the Stage2 Mid-Plate/Upper Hex Assembly was installed, the Stage1 Close-out Plate & Close-Out Plate Cover were installed (still need to put in bolts and torque the latter).

Subassembly Status

• Small (stage 1-2) Actuators:  COMPLETE
• Large (stage 0-1) Actuators:  COMPLETE
• Small (stage 1-2) Lockers:  COMPLETE
• Large (stage 0-1) Lockers:  COMPLETE
• Flexures (stage 0-1):  COMPLETE
• Flexures (stage 1-2):  COMPLETE
• Sensors (stage 1-2):  currently being built
• Sensors (stage 0-1):  currently being built

Misc.

Top-Facing Keel plate was put on the Granite Table (lots of helicoiling for it!)

Opened Y-arm for ~90 minutes for squeezer group

Gerardo assisted-  

Dumped gate annulus then opened GV10.  Dumped gate annulus then cycled GV18, cycled GV5, dumped all annulus volumes then cycled GV1, cycled IP1, IP2, IP3, IP4, and IP11.

Dumped GV14 gate annulus into pump cart, opened GV14

PT144 alarms should now go away

Ops Summary

Sprague
Unifirst
Mid Columbia Forklift
delivery from Peninsula

BSC7 dome removal for in chamber cleaning
LVEA SUS test stand assembly
Transition to laser hazard for locking of H1 Y arm
Optical lever mid arm testing

In-Chamber Cleaning (henceforth ICC)

BSC-7
The dome was removed by the Apollo crew, led by Randy Thompson. The operation went pretty smoothly although the dome still lists to one side and counter-weight must be used to keep it level during transit. The o-ring protectors were installed on the flange (6 sections)and C-3 soft covers were installed on both the door and the dome.

Mark Layne, Zack Haux and I garbed up after lunch. Mark and Zack removed the one electrical feed-through on the chamber and it was wrapped for storage. Zack went into the chamber and installed support tube/bellows protection (C-3 covers)on the west support tube. Mark prepared the 60" dust barriers and Zack installed them in the north and south beamtubes. We thought that the west beamtube nozzle might be a different size than the others but it wasn't true. Turns out that once we got some experience with installation, the dust barrier fit much better. We still have a little work on that dust barrier as the Viton rim is lost somewhere on site. (If nothing else we'll cut and clean a new one.)

The other tooling is ready to go tomorrow: the compressor trailer is in the high bay (close to the BSC), the hose is there too, six tools are cleaned and in the staging area-two with shrouds attached so we can get started tomorrow.

In-Chamber Cleaning (henceforth ICC)

BSC-7

20 June 2011
Continued training Apollo contractors (Mark Layne and Zack Haux) regarding contamination control and viewports (Kyle Ryan), general in-chamber cleaning procedure, and job hazard analysis (Michael Landry). Removed four viewports, one camera, and one illuminator. Viewports were preserved in Class A condition. Camera and illuminator were wrapped in UHV foil and set aside. 

EPICS CDS RMS Filter

J. Kissel, R. Lane

While working on the BSFM we came to the conclusion that we needed to be able to plot the RMS values of the OSEMS. This included some slight modifications to the model to include new Test Points, recompilation of the model, modifications to the.ini to be able to record the new RMS Test Points, and a DAQ reload. We took a power spectrum of X1:SUS-BSFM_M1_OSEMINF_F1_IN1_DQ and X1:SUS-BSFM_M1_WD_OSEM_F1_RMS_IN1_DQ (CDS RMS Channel), discovering that the CDS RMS filter is, in effect, a Low Pass Filter. Note: X1:SUS-BSFM_M1_OSEMINF_F1_IN1_DQ(RMS) is the DTT RMS of X1:SUS-BSFM_M1_OSEMINF_F1_IN1_DQ.

BSCISI #2 Assembly Status

(Corey, Eric, Mike V., Jim)

Plate Shuffling

Thought we could work on the Stage1 floor on the Assembly Stand, but since we need to install Ballast Weights under it, it wasn't going to work.  So this plate was moved onto the Granite Table (where the Stage2 Midplate was....Stage2 Midplate was moved on to the Assembly Stand).

Stage0 Assembly

5/8" bolts were torqued down (once we received a Class-B-ed socket).

Stage1 Assembly

After the Stage1 Floor was moved onto the granite table, the walls were installed.  This assembly was then installed on to the top facing Optics Table plate.

Stage2 Assembly

Tried to be clever and pre-assemble the inner hex walls on this plate while it was on the Assembly Stand, but we discovered these walls cover up holes for other bolts we need to get to later, so the inner hex was disassembled.

X1 BSFM Blade Tip Height Adventure

B. Bland, J. Kissel, R. Lane, J. O'Dell, N. Roberston, T. Sadecki

Over the weekend, I took a two vertical transfer functions, at high frequency (15-50 Hz) and at low frequency (0.05-0.3 Hz), using swept sine DTT (as opposed to the white noise excitations that have been performed in the past) just to begin to get a feel for what would be excitation levels will be needed to get good coherence for Matlab transfer functions. However, in the process, I discovered that there was a good deal of cross-coupling between vertical and roll (with a little bit of transverse -- see first attachment). This cross-coupling is completely unexpected, but our best guess was that it had to do with the recently re-adjusted blade spring tip heights -- in that one side of blades, or even a particular blade was higher that the opposing side. 

So, taking advantage of the newly arrived Joe O'Dell, we went in and re-assessed and re-adjusted all four blade spring tip heights, such that they "better" matched the nomimal 26.6mm from blade spring tip height to M1 base plate (see description of measurement in Saturday's aLOG). After a few more lessons from Joe on how best to align the OSEMs (use CAM tools instead of just fingers -- see second attachment), we sat down for another round of transfer functions. Retook the 15 -50 Hz Vertical transfer function (because it was quick), and the cross-coupling has *changed* but *not improved.* 

Both Joe and Norna recommended a pitch transfer function to diagnose whether we've got the blade tip heights correct. 

Attached (fourth attachment) are the results of the (white noise) transfer function, compared with two models. The first, blue, "d1 = Nominal" model uses the same parameter set that was used for the BSFM's final design review (see T1000724), except that I've removed the damping by turning the damping gains to 0.0, to recreate a free model. This is what the M1, Pitch to Pitch transfer function *should* look like. The second, green "d1 = Nominal - 3 mm" model uses the exact same parameter set, except for subracting 3 mm from the d1 parameter (the distance between the vertical suspension break off points of the M1 blade springs and the M1 center of mass). This is the same as *raising* the blade spring tip heights by 3 mm.

One can see that the "d1 = Nominal - 3 mm" model matches first two measured resonances exactly -- the first mode at 0.41 Hz is a L mode. The second mode, at 0.44 Hz (nominally at 0.48 Hz) is the pitch mode that we're trying to nail (see M080134 for reasoning). Again, this implies that the blade spring tip heights are *too high* by 3 mm. 

So, tomorrow we will readjust the blade spring tip heights such that our fiducial measurement reads 23.6 mm (the distance between the blade spring tip and the M1 base plate).





The DTT files for the attachments can be found here:
~/SusSVN/sus/trunk/BSFM/X1/BSFM01/BUILD02/SAGM1/Data
(First Attachment)
110617_X1SUSBSFM01_SweptSine_V_15to50Hz.xml
110617_X1SUSBSFM01_SweptSine_V_0p05to0p3.xml -- This one's cycles and averages are ridiculous, if you want to use it again (and have it *not* take all weekend, then reduce the number of cycles / averages / points)

(Second Attachment)
110620_X1SUSBSFM01_OSEMDiagonalization_VtoLFRT_1p1Hz.xml
110620_X1SUSBSFM01_OSEMDiagonalization_YtoF2F3_1p4Hz.xml

(Third Attachment)
110620_X1SUSBSFM01_SweptSine_V_15to50Hz.xml

(Fourth Attachment)
110620_X1SUSBSFM_WhiteNoise_P_0p005to50Hz.xml
(Exported as 110620_X1SUSBSFM_WhiteNoise_P_0p005to50Hz_F1F2F3LFRTSDLTVRPY_{tf,coh}.txt)

The Matlab script to process the Pitch transfer function is
plot_110620_X1SUSBSFM01_WhiteNoise_P_0p005to50Hz.m
(which uses the BSFM model and parameter files in ~/trunk/BSFM/Common/MatlabTools/BSFM_Model_Production/, which are edited versions (as described above) of T1000724)

Oplev Mid-arm Test

(Gregorio, Gerardo, R. Savage, Volker)

- Electronics and telescope arrived today
- Breadboard and translation (X-Y Opto-Sigma)ready to be mounted on the RX pylon
- Corrections on the base plates were completed by the Apollo crew (late last week)
- E. James was at the site inspecting the test area; E. Black will come tomorrow
- After staging and planning,'tilt' angles, etc, final locations set for oplev mid-arm test 
   * Final approval is needed to drill holes and grout plates

PT144 alarms

Operators:  Sorry for the nuisance PT144 alarms.  GV14 has been left cracked open to allow IP10 to pump the accumulating hydrogen in the X-1 beam tube module    but obviously it is not open enough as the pressure in X-1 hasn't leveled off -> I will open GV14 a little bit more tomorrow.  

Added 2 quarts turbine oil to Kobelco

Ops Day Shift Summary

The SUS crew prepared the first test stand in the LVEA to receive an ISI.
Gerardo and Gregorio messed with oplevs at MY.
SEI crew (Greg) continued HEPI assembly in the LVEA.
Assembly of custom clean room #2 proceeds apace.
The planned Y-arm peek and laser hazard in the LVEA was delayed until tomorrow morning to give Kyle some time.

HEPI HAM 7

The HAM 7 HEPI frames and crossbeams are now in place and have been brought to nominal position. The set screws in between the HEPI frame and the foot were used to adjust the height and reduce the skew. Working with Scott and Ed the support tubes were able to be brought within 8-12 thousandth of an inch of the specified value.

 

HAM 9 work has already started with removing the old iLIGO equipment and staging the new aLIGO piers and frames.

Update On BSC Assembly Work

(Corey, Eric, Fabrice, Greg, Jeff, Jim, Mitch, Myron, Sebastian, Vincent, et. al.)

It's been a while since progress has been posted, but tons of work has occurred; so here's a rough summary of the main assembly points of the last week or two.

BSC ISI#1

• Blade Springs:  Installed and pulled/pushed for both stages
• Lockers: Installed (both stages)
• Actuators: Installed (both stages)
• Sensors:  Assemblies built (except for actual sensor & target face).  But they are practically ready for install
• Horizontal Gs13's:  Installed
• Vert GS13's:  Issue with dowel pin/hole connection.  Will ream (make bigger) the holes on the GS13 base once we receive/clean reamers which were recently ordered.

Notes:  The L4C's & GS13's we recently received from LLO had noticeable dark powder/marks on them (believe this is the typical Aluminum Oxide we've seen before).

WHAT'S NEXT ON #1:  Goal is to float the assembly today (which means tossing lots of mass on the Assembly!), and hopefully start some testing soon (Vincent could atleast play with the Horizontal GS13's)

Circuit Overload?

We have been overloading one of the electrical circuits in the Staging Building (noticed this when we hooked up Rai's helicoil machine and vacuum).  When this circuit trips, it would shut every thing on this circuit down:  including both the BSC/HAM Test Stand AND SUS Test Stand (!!!).  Several times Vincent had to deal with losing all of his work and it would generally take a few hours to get everything back on-line. 

I believe there are the two plugs which are on the wall with the circuit in question.  Do not plug anything into these circuits which could overload the system (i.e. vacuum for example).  Perhaps we should put up some signs, or tape over the plugs, or have some killer moths guard the plugs (more on them below).

BSC ISI#2
Roughly 75% done with helicoiling Optics Table

Staging parts for this assembly

Attack Of The Moths (& Tropical Temperatures)

Over the last month or so, we've noticed a deluge of moths within the cleanroom area of the Staging Building (attached is a photo of a pile of dead ones on the floor).  They've been spotted inside and outside of our big cleanrooms (and we found a dead one on a large BSC plate under a cleanroom cloth cover!).  This is just to note if we come across any questionable particulates.

On Monday it was downright tropical in the Staging Building (can't remember but it was in the mid to high 80s).  John was able to give us tolerable temperatures by the afternoon (perhaps the moths like warm weather & learned how to futz with our thermostat!)