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Reports until 17:19, Friday 08 February 2013
LHO General
dale.ingram@LIGO.ORG - posted 17:19, Friday 08 February 2013 (5436)
Day summary for Friday
H1 AOS
dale.ingram@LIGO.ORG - posted 17:04, Friday 08 February 2013 (5435)
Dust Monitor 4

Dust monitor 4  in the beam splitter test stand clean room was of interest today because of drilling for cable trays along the Y beam manifold.  Signals from this monitor were quiet throughout the drilling, with only occasional 3um counts of 10 or 20.  There have been several higher count episodes (100-200) over the last 1.5 hr while someone has been working on the suspension.

H1 SEI
hugh.radkins@LIGO.ORG - posted 16:40, Friday 08 February 2013 (5434)
WHAM1 HEPI L4Cs 1/2 Leveled--HEPIs ***Unlocked***
That is half of the L4Cs have been leveled.  We got the East side done today and will work on the West side corners Monday.  The HEPI remains unlocked--mind the signs please.
LHO General
patrick.thomas@LIGO.ORG - posted 16:00, Friday 08 February 2013 (5432)
plots of dust counts
Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot requested from 5 PM Feb. 6 to 5 PM Feb 7. Also attached are plots of the modes to show when they were running/acquiring data.

Data was taken from h1nds1.
1440 seconds worth of data was unavailable on this server
1440.0 minutes of trend displayed
Non-image files attached to this report
LHO VE
kyle.ryan@LIGO.ORG - posted 15:49, Friday 08 February 2013 (5433)
HAM2-HAM3 pumpdown -> 9.5 x 10-7 torr


			
			
H1 SUS
robert.schofield@LIGO.ORG - posted 15:41, Friday 08 February 2013 (5431)
PRM Phase 2b TFs - ready to roll

Betsy (sadly logged in as Robert)

 

Today, we finished adjusting the roll, pitch, and z DOFs of the glass PRM.  The center of the optic is sitting at 158.75mm above the table surface (if it had the 19.1mm spacer under it).  The nominal is 158.8 +/- 1mm.

Travis adjusted the top stage BOSEMs to center in x,y,z and Mark is on deck to run TFs.

We;ll refit the lower stage OSEMs next week.

LHO VE
kyle.ryan@LIGO.ORG - posted 15:24, Friday 08 February 2013 (5430)
Started leak-checking at X-end
Found BSC5 dome annulus is leaking badly -> Will spray new CF joints next week
H1 SUS
keita.kawabe@LIGO.ORG - posted 11:34, Friday 08 February 2013 (5428)
New H1 TMSY Suspension settings (Vincent, Keita)

Vincent told me that H1 TMSY was ringing up when the damping was on. BIO was working.

Eventually I found that I had to turn down the damping gain of all rotational modes by half, plus turn off ELF10 filters in the coil outputs, to get going stably. Since there is zero reason to go aggressive under the air, I'll leave them like that for now.

H1:SUS-TMSY_M1_DAMP_R_GAIN is -10 instead of -20.

H1:SUS-TMSY_M1_DAMP_P_GAIN is -5 instead of -10.

H1:SUS-TMSY_M1_DAMP_Y_GAIN is -5 instead of -10.

All ELF10 filters are disabled instead of enabled.

My guess is that somebody decided to go aggressive under the vacuum a long time ago, and now, in the air, OSEM positions are different and that makes coupling between DOFs different, causing oscillations.

H1 SEI
hugo.paris@LIGO.ORG - posted 11:02, Friday 08 February 2013 - last comment - 17:30, Tuesday 12 February 2013(5427)
HAM-ISI - Viton Pads Efficiency Test

Viton pads are usually set under the balancing masses of the HAM-ISIs in order to damp resonances at high frequencies (above 100Hz).

The SEI team would like to asses the improvements that the Viton Pads help achieving. To do so, we decided to have viton pads under the balancing masses of the ISIs of LLO's IMC, and to try without those pads here at LHO.

Transfer functions were measured ovenight on LHO HAM3-ISI. We compared those transfer functions with the ones measured at LLO under an equivalent state:

Comparative plots are attached.

Non-image files attached to this report
Comments related to this report
hugo.paris@LIGO.ORG - 17:19, Monday 11 February 2013 (5464)

The script which produced the plots mentioned above was re-checked. The curves it displays match with the ouput of the generic commissioning scripts, for both LLO and LHO. 

Data in the 5Hz-200Hz range was retreived and added to the plot. Results are attached.

Non-image files attached to this comment
hugo.paris@LIGO.ORG - 17:30, Tuesday 12 February 2013 (5477)

The results presented above were calibrated and transposed into the cartesian Basis, as performed during the step 3 of the commissioning process of HAM-ISIs.

Narrow peaks can still be seen on LLO's transfer functions. We held off on the installation of the Scraper Baffles here, while they were already on the ISI at LLO, at the time of the measurement. It could be the cause of it.

Once HAM3 chamber is open, we will look at the items installed on the ISI. It should help clarifying the cause those peaks that we did not witness here.

I attached a picture of HAM3 chamber taken on Dec 6th 2012. Pumpdown started on Dec. 21st.

Non-image files attached to this comment
H1 General
dale.ingram@LIGO.ORG - posted 07:55, Friday 08 February 2013 (5426)
Friday morning alarms in CR

I acknowledged the following alarms Friday morning:

All of these cleared when acknowledged except the IOP which remains yellow.

LHO General
bubba.gateley@LIGO.ORG - posted 06:54, Friday 08 February 2013 (5425)
Yesterdays report
The Apollo crew removed the ISI from BSC 10 and placed it on the north side of the termination slab, wraped, bagged and sealed. We chose to stand down on the ICC for now, instead we relocated the clean rooms that were over HAM 4 and BSC 1 and began disassembly of the E module and work platform around BSC 1 to be relocated to BSC 2.
H1 CDS
david.barker@LIGO.ORG - posted 17:56, Thursday 07 February 2013 (5424)
FMCS network at EX disrupted due to disconnected ethernet cable

At approx 08:10 this morning the network to the EX FMCS system and the wall camera was disrupted. Upon investigation we found that the ethernet cable in the VEA rack was disconnected. This cable had an extender and a 6 feet additional ethernet cable before it plugged into the Foundry switch. The connection at the extender was disconnected. We found that the extender was not needed any more and plugged the long haul cable directly into the switch.

H1 DAQ
david.barker@LIGO.ORG - posted 17:52, Thursday 07 February 2013 (5423)
h1fw0 down this afternoon

Dan from LDAS worked on the h1ldasgw0 system to investigate why h1fw0 has become unstable since last Wednesday 30 Jan with apparent disk write slow downs. He upgraded the firmware, we then restarted the h1fw0 writer. Jim has made h1nds1 the default nds because of this problem so the shutdown had minimal impact.

After h1fw0 was restarted we restarted the DAQ due to an 0x2000 status on h1hpiham1. It appears that the model change earlier made channel number changes and a change in DQ channels (perhaps a common model was changed recently).

H1 SUS
betsy.weaver@LIGO.ORG - posted 16:56, Thursday 07 February 2013 (5422)
PR3 optic - loaded into oven

The magnetized PR3 optic was loaded into the custom ABO today for a 6 hr. ~34 degC air bake.

H1 SUS
betsy.weaver@LIGO.ORG - posted 16:52, Thursday 07 February 2013 (5421)
PRM-04 optic suspended in suspension

Yesterday, we installed the PRM optic in the suspension.  Today, we adjusted roll and suspended it.  It has a bit of a pitch which we will need to work out tomorrow - the top mass is ~level and the optic is ~level, but the middle mass is pitched.  So, it's either the top mass blades, or middle mass weight configuration inducing pitch.  WIll confer with others and make adjustments tomorrow.  Preliminary height measurements do not indicate any major height problems.  Final numbers/tols will come later after tweeked.

H1 SEI
hugh.radkins@LIGO.ORG - posted 16:17, Thursday 07 February 2013 (5420)
WHAM1 HEPI Unlocked
I really didn't get to any L4C leveling but unlocking is the first step so I did get started on this long pending task.
Please be mindful of the signs and avoid the blue Crossbeams.
LHO General
gerardo.moreno@LIGO.ORG - posted 16:13, Thursday 07 February 2013 (5419)
Ops Shift Summary

Activities for today:
- Pole cavity measurement, PSL room, Michael R., Rodica M. and Paul F.
- Jim B., One-stop card addition, see his aLOG.
- Eric A., working around WBSC02, no cranning needed.
- Hugh, Cable relief at WHAM02.
- Ski, working fixing X-Mid intrument air.
- Kiwamu, ALS path work, PSL area.
- Praxair, LN2 delivery CP1.
- Kyle work at the input tube large ion pumps.
- Hugh, work at HAM01, HEPI is unlocked now.
- Dave and Jim, visited X-End troubleshooting FMCS/camera communication issues.

LHO FMCS
mark.lubinski@LIGO.ORG - posted 15:54, Thursday 07 February 2013 (5418)
FMCS data problem
The communication problem with X end FMCS has been fixed
LHO VE
kyle.ryan@LIGO.ORG - posted 15:51, Thursday 07 February 2013 (5417)
Replaced compressor #2 pressure relief valve on Y-end purge-air skid
Had found stuck open previously and had valved-out -> Now all (5) compressors are valved-in
LHO VE
kyle.ryan@LIGO.ORG - posted 15:35, Thursday 07 February 2013 (5415)
Moved South crane in LVEA from HAM2 to HAM3 then back to HAM2 ~1330 - ~1430 hrs. local
Used for fall protection whilst atop MC tube (Connecting HV cables to IP1 and IP2)
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