Mike V, Rick S, Darkhan T

This afternoon the alignment of the ETMX PCal IR path was finalized.  The upper/inner beam did not require adjustment of the periscope optics. The outer/lower path required realignment of two mirrors.

The alignment of the camera optics was finalized. The paths from both camera viewports were adjusted. The camera and enclosure that were installed in the upper viewport on the West side of the beamtube has been removed for this work, and will be re-installed at its final position in the lower viewport on the east side, next to the OpLev transmitter.

Particle counts were taken before, during, and after the in-chamber work.  After entering the chamber, Rick wiped the floor plates to reduce stirring up dust.  The actual counts will be posted as a comment, but the cleaning reduced the after-chamber-work particle counts from ~2000 cts to ~350cts for 0.3 micron/c.f.. A great improvement.

08:55 Daniel and Sheila working on optics table at end Y ?
09:00 Jodi reports H1 PSL chiller is alarming
09:02 Hugh to HAM 3,4,5 to balance check seismic
09:05 Jeff B. and Andres going to HAM 4 and 5 for contamination control closeout work
09:09 Paul and Jordan to end Y to work on PEM
09:10 Jeremy B. and Matt H. going to HAM 4 and 5 for closeout work
09:12 Jeff B. added 200 mL of water to the H1 PSL chiller
09:12 Nathan starting unattended work in optics lab with laser on
09:16 Mike V. to end X, PCAL work?
09:23 Rick called from end X, looking for Mike V.
09:30 Doug C. to ITMY, spool area to calibrate survey equipment
09:37 Jason heading out for ITMY alignment
09:46 Aaron to end Y to install illuminator chassis in SUS rack
09:52 end X is in laser hazard
09:53 Travis to ITMY to work on reaction chain alignment
11:15 Stewart and Arnaud to HAM 4 and 5 to better communicate with closeout team on transfer functions
12:48 end X is laser safe
12:59 Aaron to end Y with power cord for illuminator chassis, and then to end X to install illuminator chassis there
~13:30 Dale leading tour in control room
14:00 start of putting doors on HAM 4
14:11 Jeff K. to end X to measure cable tray lengths
14:12 Stewart into LVEA to start work on SR2
14:46 Hugh to electronics room to check coil driver chassis
14:56 Mike L. going to HAM 4 to talk to closeout team
15:05 Jeff K. back from end X
16:01 Nathan done unattended work in optics lab
16:30 Fred taking 2 visitors on tour through the LVEA
16:30 standing down on putting door back on HAM 4, reapplying first contact

Mike V, Rick S, Darkhan T

This morning Rick and Mike went into chamber to continue with the alignment of the PCal transmitter and periscope, with Darkhan outside. Alignment now looks good.

This afternoon we will continue with alignment checks of the camera mirrors.

Particle counts were reasonable before work commenced (attached photo IMG_0086), however after exiting chamber counts were very high (attached photo IMG_0087).

This is most likely due to stirring up dust; we will wipe the floors as well as the PCal periscope and Manifold Cryo Baffle which are noticeably dirty.

Some odd noises were also coming from the clean air compressor (very low audible tone), Kyle is investigating.

High Potential (HIPOT) testing essentially applies a predetermined high voltage to a device under test.  If a threshold current is detected, the tester shuts down and issues an audible and visual alarm alerting the operator. 

The following items associated with the HAM6 ISC Fast Shutter system have been HIPOT tested using the indicated DC voltage.  The threshold current was set at 300uA for all measurements.

(Refer to D1400225 for cable components and D1400078 for overall shutter details)

1.  Air-side 35 foot, 6 conductor cable - Tested at 3kV in every possible wire permutation including the connector body
2.  6 Pin vacuum feedthrough (Military 5015 connector compatible feedthrough) - Tested to 1.5kV
3.  In-vacuum 10 foot, wiring harness (from flange to shutter) - Tested to 1.5kV while attached to vacuum flange
4.  Fast Shutter Coil - Tested to 1kV as a fully assembled unit (between coil and fast shutter body)

The chosen voltages are somewhat arbitrary based on an internal dialog with myself, but the maximum system voltage for the fast shutter is 500VDC.  The fast shutter operational peak current is just under 30 amperes with that peak lasting a few milliseconds.

While working around the ISC rack behind HAM6, we noticed a cable labelled ISC_410 falling off. Not sure if it was plugged or not before. tbd

Updated the dataviewer and command line nds tools on the DTS to test changes to read unsigned int values.

Got a couple sections, 5 to 800Hz Friday evening before Matt grabbed it Saturday morning.  Yes the number of averages was too many.  Matt relocked te ISI and Sunday night the .01 to 5hz was collected.  See attached for the concatenated sections.   They look identical to the In-Vacuum TFs run a year ago.  I'll attach those too for anyone interested.

TFs completed.  Relocked ISI; float/locked position comfortably within spec.

ISI left Locked.

Upon unlocking HAM4 there was a shift of just a few 100 counts vertically.  Relocked to confirm lock position--still good.  No balance mass adjustments required.

ISI left locked.

Upon unlocking the ISI, there was a 1200,-4100,2800 count vertical shift in the CPSs; spec is <1600.  Relocked to confirm and yes, we have a out of spec unlock position.

Just a little weight shift to correct this, a few tenths of a pound, I don't think the total mass changed by more than a 0.1lbs.

ISI left locked.

LASER is on
Frontend output power is 36.2 W, HPO output power is 29.9 W
Watchdog is green
'LRA out of range' error is active [OUT OF SPEC]

PMC:
Locked for 1 day 19 hours
Reflected power is 19.5% of transmitted power (should be 10% or less) [OUT OF SPEC]

FSS:
Locked for 1 day 19 hours
Trans PD threshold is .4 V, should be at least .9 V [OUT OF SPEC]

ISS:
Diffracted power is ~ 9% (should be ~10%)
Last saturation event was 1 day 19 hours ago

HAM2: Apply first contact, check cables into ISS array
HAM5: Check seismic, clean chamber, pull first contact, run spectrum, close doors
ITMY: Reaction chain alignment
BSC3: Check issues with first contact
end X: PCAL alignment
end Y: Installation of hardware for illuminators, laser noise eater

Install doors on HAM4 and HAM5

model restarts logged for Sun 20/Jul/2014
2014_07_20 11:00 h1odcx
2014_07_20 11:05 h1odcx
2014_07_20 11:10 h1odcx
2014_07_20 11:12 h1odcy

no unexpected restarts

These were not running when I came in. I burtrestored both to 07/18/2014 09:00.

Matt, Rich

All picomotors in HAM2 have been retrofitted with Kapton washers to prevent the motor from sticking upon full insertion of the screw thread.  The process of installing the Kapton washers in HAM2 was made far easier when Matt had the good idea to cut the washers (now known as the Heintze Cut) such that they can be put on one-handed (See attached photo).  Essentially, what started as a simple washer shape ends up more like a Greek capital omega.  After that bit of cleverness, it is now possible to actually put the washers on all the picomotors in HAM2.  All washers should be so cut from now on.

While in HAM2, I had a chance to see the ISS array cabling.  Given the constraints, what has been done is about as good as can be done.  A decent cable strain relief has been implemented.  Unfortunately, as the PSL folks well know, there is really not much holding the connectors in place.  Just prior to closing this chamber, it's essential to gently verify the connectors are fully seated as I found two that were not fully engaged.  Matt mentioned how the halogen flood lights can be used to illuminate the array such that it's possible to see the 120Hz detected by each PD; this should also be done prior to final closing.  It's suboptimal, but it's what we have.

Kate G, Rich A, Calum T, Matt H

Again another big thankyou to Kate, Calum and Rich for coming in for another marathon session today (which is still going I am just getting a jump on the alog). Much appreciated you all coming in on both days of the weekend to do this and help me

Things for the most part went really well today. Today we:

• finished locking MC1. Rich watched the magnets on the back as I gently pushed the optic back using the front stops until the optic hit the back stops (because back stops locked in place). I then locked barrel EQ stops and removed the front EQ stops on the optic. MC1 now ready for FC
• Took front EQ stops off PRM and MC3 optic. Both now ready for FCing
• Installed Kapton washers on pico motors in HAM 2 (Rich will write a bit more on this). All Kapton washers now installed on pico motors in HAM2 and 3
• Inspection occurred on ISS array cabling/strain relief (Rich will write a bit more on this).
• SR3 was finished being first contacted and the baffle in front of SR3 put back in place
• SR3 was released for Arnaud to take TF's overnight if he wants
• SR2 was first contacted, Face EQ stops put back in place and TCS mirror put back in place
• Beamsplitter optic finished having its FC applied.

I think thats most of it. Doesnt sound like much but was a full day

So HAM4 and HAM5 should still be on schedule to get all doors on tomorrow (if I can have Apollo guys for doors, SEI guys to check balance (and unlock ISI at the end), Arnaud to do quick TF's for me and Jeff B to put wafer in for me, and someone to help me wipe down in HAMs 4 and 5 I should be able to get unlocked and all doors on in short order), . Here is what I believe are the steps to go:

HAM5 (should do first I think)

• Double check ISI balance quickly
• Lock SR3
• Quick last wipe down
• Peel FC on SR3
• Peel FC on small monitor optic on SRM
• Unlock SRM
• As unlocking SR3, install wafer
• Quick pitch TF on each suspension to see if have unlocked correctly
• Quick last check for tools, etc
• Unlock ISI
• Doors on

HAM4

• Double check ISI balance quickly
• Chamber clean (hasnt been wiped down yet, and this is why think HAM5 should go first)
• Install wafer
• Peel FC on SR2
• Peel FC on monitor optic on SR2
• Unlock SR2
• Quick pitch TF to see if have unlocked suspension correctly
• Quick last check for tools, etc
• Unlock ISI
• Doors on

Additionally I believe Kate/Calum et. al. tomorrow are going to try to finish off the FC on BSC3 (painting the outer "crust" and then move onto starting the 4 triples in HAM2 have to do FC to.

Note: The HAM AUXs ARE NOT locked in HAM2 and I dont plan on locking them at this stage for the work that needs to go on in there. So though the main optics are locked pleas go a little eay in HAM2 if you find yourself workin gin there

Based on yesterdays FC troubles I went back and had a look at some of my alogs regarding humidity in chamber.

By looking at the various pics I posted of particle counts in links:

https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=12874

https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=12873

https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=12866

https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=12859

You can see the humidity in chambers varies from 13%-33%. I was surprised at this, and I have to take back what I had said to Kate and Calum yesterday at how I said I had noticed that the humidity levels usually stayed pretty constant in chamber here at LHO

Calum, Kate, Rich A, Nichole, Betsy

Reporting for the team last night:

After collecting all of the required equipment, we started the ITMx First Contact cleaning at ~5pm yesterday.  We used the spray cone to apply a nice coating to the CP-AR and then to the ITMx-HR.  When we did the ITMx-HR we had to slide the ACB wedge part way out in order to have the ACB swing back in such a way to not interfere with the spray cone attached to the front of the QUAD structure.  Reportedly there is a new cone somewhere that does not interfere with the ACB fully swung back.  Will continue tracking said cone.  The plan is to clean the chamber and continue with other mechanical closeout items before pulling the FC and closing the chamber door (the typical procedure).

Prior to starting the First COntacting of the ITMx-HR surface, we attached the green lantern fixture and inspected for particulate on the surface of the optic.  A few weeks ago, we used the fixture to spot ~2 particles per sq. inch on this surface.  Since then, much in-chamber activity has taken place.  Yesterday, we spotted ~5-10 particles per sq. inch.  We should inspect after we pull the FC.