I did a quick temperature test of the PSL room today, shutting off one AC unit (ACN) and seeing if the other unit could hold the temperature of the room steady. It could not. I turned the other unit back on after about an hour and the room temperature as returned to normal. The spike in the attached plot shows the temperature excursion.

We removed the rigid section of spool BE-3A and placed hard covers on each end and placed on pallets. We laid both of these sections down for safe storage. Hard covers were placed on the flanges of bsc 2 and ham 3 as well. We loosened all of the door bolts on ham 2 after a 1st cleaning and plan on removing those doors tomorrow.

We pulled the soft cover off the North side of HAM3, and took a series of pictues in the chamber. 

These pictures will be used to asses the state of the ISI payload when we measured the ISI transfer functions for the Viton Pads Efficiency Investigation.

Attached phase 2b power spectra for PR3.
The two first pdfs show a comparison of the power spectra between L1-PR3 (June 2012),X1-PR3 (June 2012) and H1-PR3 (Feb 2013) respectively damping off and damping on.
The three others show the effect of damping for the top, middle and lower masses of PR3

New power spectra will be taken tomorrow since Betsy has to change some of the OSEMs.

Mark and Arnaud

Betsy wanted to set the M2 OSEMs on the beamsplitter so we logged the open light voltages and calculated the gains and offsets.

prettyOSEMgains(logOLs('H1','BSTST'),'BSTST')

M2UL 25262 1.188 -12631
M2LL 24175 1.241 -12088
M2UR 24464 1.226 -12232
M2LR 20926 1.434 -10463

Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot requested from 5 PM Feb. 12 to 5 PM Feb 13. Also attached are plots of the modes to show when they were running/acquiring data.

Data was taken from h1nds0.
1440 seconds worth of data was unavailable on this server
1440.0 minutes of trend displayed

The Mid-Y entry bay is now full up with TCS optical enclosure equipment. Thanks to Rodney and Ski for helping me get it all moved in. 

HAM-ISIs and (HAM)-HEPIs use the latest version their respective master models. 
- Revision 3734 for HAM-ISI
- Revision 3774 for (HAM)-HEPI

Unit-specific models were updated with the $Id$ and $HeadURL$ tags for the following units:
- H1: HAM2-ISI
- H1: HAM3-ISI
- H1: HAM1-HPI
- H1: HAM2-HPI
- H1: HAM3-HPI

svn propset was performed. Unit-specific models were re-compiled, restarted and commited to the SVN. Tags got updated with the proper fields (see atachement for example). These tags will automatically be updated at every svn commit from now on.

Note: We were running on an old HAM-ISI master model to avoid perturbating the IMC test. Channel rates were updated since, which required a DAQ restart. DAQ restart was performed today around 3.15pm by Dave Barker.

Leak testing done @ X-end with the exception of the viewports which I should be able to get to tomorrow -> Discovered that the gate valve which isolates IP12 is leaking  > 3 x 10-7 torr*l/sec and will need to be addressed at some point.

- Fire department at MX and EX
- Dust alarm: EX_DST1_1, EX_DST1_5 ("INVALID" values)
- CDS alarm: H1:SUSB6-SUS-ETMY--CPU-MAX (Dave said is a bug)
- SUS alarm OSEM5 - OSEM6: Mark explain that this is a special situation when systems are not in vacuum
- PSL alarm: H1:PSL-ENV_LASERRM_ACN_TEMP_DEGf (Michael took over)
- Hugo restarted several models: HAM1,2,3; HEPI; etc.
- Dave restart DAC

Welding finished Tuesday; system pressured tested with argon.  One leak was found near HAM4 and was repaired this afternoon.  The system (LVEA Portion) is up to 125psi and holding.  Will sit at this for a couple days to make sure there are no small leaks.  The Actuator Hoses still need to be connected to the 4-way valves at HAM6 NW corner.  Otherwise, all connections on the hardline side are permanent.  We will do a check round of confirming the Actuator Hose connections to the 4-way valves are tight and next week we'll start flushing the hardline side.
I'll report in a couple days on the pressure test.

Meanwhile, as usual, do not operate any valves on the HEPI system.

[Stuart A, Jeff B]

Jeff reported issues running the automated Matlab TFs on his triple test-stand. I logged in remotely, but could not reproduce the errors he was seeing. 

So I have set Matlab TFs to run overnight on the LHO triple test stand. They will commence at ~8pm (CT) 6pm (PT), and run for approximately 8 hours.

While configuring these to run I noted that the x1sushxts model had been restored with the incorrect HLTS settings, so I re-configured for a HSTS and have taken a safe BURT snapshot.

n.b. please ensure watchdogs are un-tripped before leaving 

			
			


		
		

We removed the septum between ham 3 and bsc 2, wraped in aluminum foil and ameristat, laid on a pallet. The bellows portion of the spool BE-3A was also removed and hard (aluminum) covers installed on both ends of said spool, and placed on a pallet. A aluminum cover was also installed on the rigid portion of BE-3A which is still connected to bsc 2. This spool will be removed tomorrow.

I and Kiwamu disconnected all cable connectors from IOT2L, and cleared the area around the table in preparation for IOT move.

LEXAN covers were put in place on the viewports.

Laser curtains/dividers were put aside in front of the PSL room and are leaning on the west wall.

Things that seemed to be for I/O purpose (labeled containers for IO mirrors, some mirrors and a couple of mirror holders) were put in front of Cheryl's desk.

When moving the table:

1. Do NOT crane it as it would be hazardous, they're not designed for this.  Unlike iLIGO tables, the legs of these are merely held down by claws.

2. One heavy cable bundle is still attached to the table by a zip tie. Break it first.

3. Two ducts are still trapped between the chamber and the table, though the duct clamps are loose. We need to keep these ducts.

Arnaud P. and Mark B.

We noticed that the OSEMs on the M2 and M3 levels of PR2 were dead. Trending revealed that they had been dead since Tue 1/29. Richard investigated and found that the power to the AA chassis had not been turned back on after the power supply work that day (alog 5300). They're now back on and working.

Betsy and Deepak put the PRM and PR3 M2 and M3 OSEMs into the OL condition and I logged them. The values with corresponding gains and offsets are as follows:

>> prettyOSEMgains(logOLs('H1','PRM'),'PRM')
...
M2UL 24227 1.238 -12113
M2LL 25363 1.183 -12682
M2UR 25248 1.188 -12624
M2LR 26266 1.142 -13133
M3UL 24755 1.212 -12377
M3LL 24556 1.222 -12278
M3UR 26514 1.131 -13257
M3LR 25374 1.182 -12687

>> prettyOSEMgains(logOLs('H1','PR3'),'PR3')
...
M2UL 17618 1.703  -8809
M2LL 20217 1.484 -10109
M2UR 18644 1.609  -9322
M2LR 17674 1.697  -8837
M3UL 17262 1.738  -8631
M3LL 22811 1.315 -11406
M3UR 24286 1.235 -12143
M3LR 17108 1.754  -8554

Attached power spectra of MC2 and PR2 from yesterday afternoon Feb 12th, comparing damping on and off. 

Deepak and Bubba report they're done for the day, so commencing Matlab TFs on PR3.

[Kiwamu, Paul]

Just before the vent today we measured new noise spectra for the frequency and length feedback paths.

The 'whitening filters' in the IMC_X path (see Giacomo's LHO alog entry 5311) were not engaged. They were put in the model at LLO in an attempt to combat the digital noise in IMC_X above ~50Hz (see Anamaria's LLO alog entry 5821) but need to be taken account of when plotting the data.

We corrected the IMC_F frequency to length calibration to give the equivalent motion of MC2, instead of the equivalent round trip length change. This has now been edited in the filter bank for the IMC_X path; the FtoL filter has been changed to a DC gain of 5.8465e-14 (dX=df x lambda/(2FSR)). 

Relevant paramters during the measurement:

Common mode gain 20dB

Common mode filters: Compensation and 1st Boost

Fast gain -2dB

Slow path bypassed offsets and filters

MC2 M3 lock gain -1000, engaged filters: 150:4 and CLP100

MC2 M2 lock gain 0.06, engaged filters: 0.01:0.1, 0.03:1, Stab8:2, 300:1 and ELF80

Damping filter: resg and Ellip50 (the filter in IMC_X path was switched to the wresg filter to reflect this change)