BSC1:	
        Installation and alignment work on ACB
        Final IAS check on ITMY
	Mitch doing prep work for ACB installation 
	Filiberto testing the photo diodes  


BSC2/BSC3:
	Jim BSC2 problem are fixed and TFs are good
	Jim is testing BSC3
	SUS ready for final close out activities 
	TCS alignment needs to be checked

End-X:
	Will try to close BSC9 this week
	LLO crew working on close out prep and cleaning

HAM6:
	Plan to open on Tuesday or Wednesday

Electrical:
	Cable checkout at HAM6
	Prep work for high voltage work for PSL

Gerardo: 
	Viewport readiness survey

no restarts reported.

no restarts reported.

Patrick and Dave

at 14:52PDT cdsfs0 (file server for /ligo) encountered a error. All workstations are frozen due to loss of /ligo.

We are rebooting to see if we can bring it back.

The Hanford Fire Dept will be on sight doing some fire hydrant flow measurements.  Should be done around noon.

model restarts logged for Fri 25/Jul/2014
2014_07_25 10:25 h1odcx
2014_07_25 13:56 h1odcx

no unexpected restarts. PCAL work at EX.

Mike V, Richard S, Shivaraj K and Darkhan T

Pcal efficiency measurements were taken at EndX on 07/22/2014, 07/23/2014 and 07/24/2014.

We took in-chamber and out-of-chamber measurements on 07/22/2014 and saw >2% power drop between transmitter output and receiver input (overall efficiency). On the same day during several measurements in the beginning halogen chamber illumination lights were turned on. During measurements on following days we kept halogen illumination off.

Since major power drop was between transmitter output and ETMX input (viewport+periscope), on 07/23/2014 before taking any measurements we wiped some of the periscope mirrors.

By now we have
* 3 samples of in-chamber measurements, efficiency of ETMX at Pcal laser wavelength (1047nm) and two viewports separately;
* 5 samples of out-of-chamber measurements, for overall efficiency calculations.


	

		

			
Date, sample #
			
07/22/2014
			
07/23/2014
sample 1
			
07/23/2014
sample 2
			
07/24/2014
sample 1
			
07/24/2014
sample 2
		
		

			
Efficiency of the viewport at transmitter module
		
		

			
inner beam
			
0.9870
			
0.9936
			
0.9943
		
		

			
outer beam
			
0.9756
			
0.9916
			
0.9892
		
		

			
Efficiency of ETMX (reflectivity)
		
		

			
inner beam
			
0.9975
			
1.0003
			
0.9986
		
		

			
outer beam
			
0.9938
			
0.9978
			
0.9993
		
		

			
Efficiency of the viewport at receiver module
		
		

			
inner beam
			
0.9935
			
0.9951
			
0.9960
		
		

			
outer beam
			
1.0021
			
1.0008
			
1.0011
		
		

			
Overall efficiency
		
		

			
inner beam
			
0.9781
			
0.9890
			
0.9890
			
0.9858
			
0.9876
		
		

			
outer beam
			
0.9717
			
0.9902
			
0.9897
			
0.9836
			
0.9848
		
	


Background readings
* for WS were ~0.03mV (< 0.01% from laser beam unshuttered reading);
* for TXmon were ~4.45mV (< 0.5% from laser beam unshuttered reading).

Variation of ratios WS/TXmon of up to +/-0.5% were observed in most of the measurements, we assume that it's mostly due to temporal laser speckle variations.

RXmon/TXmon calibrations:
* on 07/23/2014 - 2.3539;
* on 07/24/2014 - 2.3445.

Took a snap shot of the ITMY HEPI position at various times: IAS align good (Tuesday Rz & X), SUS completes payload hanging on ISI (Wednesday Rx & Ry), and finally today when the ACB was hung on.  I'll hold the positions to these times.  With the ACB install the Z has shifted down seemingly a lot but actually only 160000nm.  I've closed the loop and used this target and the loop is fine but it isn't our practice to 'target' the Z DoF.  Rx & Ry I do want to hold although again the amount of shift isn't huge: -78000 & 20000nrads.  But this is tilting HEPI and changing the hang of the ISI stages although likely not to 1st order; our level Spec on ISI is 100urads.  Y shift from alignment time to now in only 4um.

Target values: X/RX/RY/RZ == 300000/15000/56000/-16200

Previously as reported, the Ry loop has not been stable; interestingly it seems to be happy now.  Of course the ISI & SUS both were locked for the ACB install...

Meanwhile, I have Guardian controlling HEPI for all DoFs and holding position on X, Rz, Rx & Ry.  We'll try to off load the X, Rx & Ry to the HEPI Springs at a later time. Yeehah!

Matlab TFs are set to run on HAM2 suspensions overnight as follows:-  

- MC1 (HSTS) M1-M1 undamped TFs
- MC1 (HSTS) M2-M2 undamped TFs
- MC1 (HSTS) M3-M3 undamped TFs

- MC3 (HSTS) M1-M1 undamped TFs
- MC3 (HSTS) M2-M2 undamped TFs
- MC3 (HSTS) M3-M3 undamped TFs

Starting now, and when complete the measurement status will revert to OFF and damping loops will be restored to the ON state.

n.b. all stages of the above suspensions have been configured to Coil Driver BIO state 1 to try and limit any DAC saturations.

These measurements have been initiated from the opsws2 workstation.

Mitchell R, Mike V, Travis S

Today the ITMY ACB suspension and box assemblies were installed in BSC1. There is good clearance with respect to the ITMY suspension.

Pushers and clamps are installed in preparation for alignment work to commence on Monday.

The photodiode cable is still to be connected followed by a functionality check by Richard M.

The full payload is not in place; masses currently at clean and bake will be installed Monday, followed by a short period of balancing.

Attached is a photo of the installed baffle, along with a bonus shot of a happy Mitch.

8:15-8:45 Morning Meeting
8:50-11:30 Heading into the LVEA to continue with HAM2/3 work – Matt/Jeremy
8:55-11:30 Contamination & Control work in LVEA - Jeff B
8:59-12:00 Going to End Y to work on illuminator – Aaron
9:15-12:00 Working on Optics Lab/Laser ON – Nathan
9:35-11:24 Locking/ Unlocking suspension in LVEA (BSC1 & BSC3) – Travis
9:39-11:24 Heading into the LVEA to work on ACB – Mitchell/Mike V.
9:52-12:18 Stage Viewport Preparation in LVEA – Gerardo
10:20-12:18 Joining Gerardo in the LVEA for Electric Field measurements – M. Laundry  
10:22-11:30 HAM 2 testing in LVEA – Stuart/Arnaud
10:24 - Restarting h1odex model - Dave 
12:13- 14:50 Heading back to the LVEA – Matt/Jeff B/Jeremy/Apollo
12:17- 14:50 Heading back to the LVEA – Stuart/Arnaud
12:43-     Going to End X to work on illuminator – Aaron
13:12-13:56 Working at End Y – Karen
13:18-     Replacing BSC2 ISI chassis in Electronics room – Filiberto
13:40-LVEA transitioning to Laser Hazard – Richard
14:21-12:18 Back to the LVEA for Electric Field measurements – Gerardo/M. Laundry  
14:23- LVEA transitioning back to Laser SAFE – Richard
14:37- 15:40 Returning to the LVEA to work on ACB – Mitchell/Mike V.

Jeremy B, Stuart A, Jeff K, Arnaud, Jeff B, Matt H, Apollo, Richard M

Success....HAM2 closed up :-)

Quick rundown of events. 

Entering HAM2 straight after doing door work on HAM3 and the particle counts were zero. We had some troubles with PRM showing signs of rubbing overnight so we looked at this first. I didnt find anything glaring but saw a couple stops kinda close. We backed these off ran another set of TFs and got a clean bill of health. Then to save time later we centered all ther OSEMs on all four suspensions on all stages. After this I locked all four HXTs's to get ready for FC pull

Jeff B went in and did a quick last wipe down, put in wafer and monitor optic, removed optics/wafers that were still in chamber, etc. We were all straged to pull FC but couldnt get low particle counts. People were working in BSC's so asked the to stand down to let the particle counts drop. 

After a quick lunch to let the particle counts settle, it was all systems go. On the way out we bumped into Mike Landry et. al. who had been doing tests with the large optics/top gun. I am sure he will write a report on his work but he indicated it took ~9mins for the fields to drop. Thus we decided we should blow the smaller optics for 5mins continuously with the top gun after FC pulled. As I was worried about the pony sized bottles running out we dragged a large cylinder out there for the top gun. 

Particle counts showed us good to go and so we pulled PR3, then MC1 then PRM FC. I went for MC1 now due to the awkwardness of having to unlock that suspension and how have to get on the table to do so. And I didnt want to do this with a half unlocked ISI. I inspected each optic for particulate and Arnaud/Stuart have a log of what I saw (which they will post). We also pulled the FC on the moitor optic. After I reminded myself about 50 times about it :-). We actually had to pull FC twice on it as after I pulled the outer layer, we saw there was still FC on the backside, so had to remove optic to pull backside FC and put optic back. Afte unlocking those three suspensions, TFs were taken on all three by Jeff K/Arnaus and given the all clear. Once the all clear given, the ISI was unlocked on east side and door went on. 

Whilst door being put on on east side I pulled the FC on the MC1 suspension (particle counts were low), and unlocked the suspension. We found we had to change some of the OSEM positions on the three stages.  TF's were taken on this suspension and given the all clear. Whilst TFs were being taken, Richard M transitioned us to laser hazard, and I visually inspected the ISS array cables one last time and they all looked plugged in. 

Once TF's were given the okay, the offset settings for the MC mirrors for when we flashed the mode cleaner successfully in the past were applied and the mode cleaner flashed right away. YES.

ISI on west side unlocked and door went on :-) :-)

Stuart/Arnaud have a detailed log of particle counts/timeline/particles per square inch on the optic which will post to this log

Pic: The HAM closeup crew. Thankyou to all who have helped get LHO to this point. Its amazing to be to this point and when we had schedulded it

Jeremy B, Matt H, Jeff B, Apollo

As you may remember from one of my alogs last night, i forgot to pull the FC on the witness optic in HAM3. It was decided to play it safe and pull the door to get at it. So before anyone else started in chamber work we quickly pulled the door. Particle counts in cleanroom were 10 counts and straight after the door came off was also 10 counts in chamber. Door came off at 9.09 am, Half the ISI was locked....and whilst ISI was being locked I looked at MC2 optic. Looked same as yesterday which is awesome. I tried pulling the FC on the small optic and in doing so it ripped so I only had a little bit come off with first go (I think the layer was to thin). So had to try to get at it with a gloved hand to get the rest. We did so, but it definitely meant that the cautious approach was the right one. We did a quick check to make sure we got all the FC, unlocked the ISI and the door went back on at 9.22am (off for around 13mins). Jeff checked particle counts as the door was jamming shut with the chamber and saw no puff of particulate. 

Stuart has a detailed log of timeline and particle counts that hoping he will add to this

Matt H.  requested that we verify the ISS PDs were still connected in vacuum.  I was able to get to the all 16 cables and tested each pair. They all tested fine with a reading of approximately .384VDC Anode to Cathode and OPEN Cathode to Anode on my Fluke 87V set to diode test. The last set I tested seemed to be reversed so I left them disconnected until I can have better access to the chassis under the chamber behind the HEPI support Structure.

J. Kissel, R. Schofield

I discovered a lonely, forgotten, disconnected GS13 hiding under BSC9 (H1 ETMX) chamber today. I attach pictures. 

Things that Robert and I can surmize:
- It's serial number is 574, and has a "property of the USGS, greater than $5k" sticker on the side with the number G12077 and a bar code.
- It may have been used for S5/S6 feed-forward studies (Will check with Mike, Keita, Richard)
- Ski may have purchased it, given the bar-code on the side (Will check with John)
- It's a 2005-ish era model, based on the color of its can and unfinished look of the feet.
- It's currently configured as a horizontal
- It claims of a broken locking mechanism, but after a few turns the mass seemed locked enough for transport
- It's functionality is unknown.

Finder's keepers ...