Displaying reports 72521-72540 of 83105.Go to page Start 3623 3624 3625 3626 3627 3628 3629 3630 3631 End
Reports until 18:32, Thursday 20 March 2014
H1 ISC
jaclyn.sanders@LIGO.ORG - posted 18:32, Thursday 20 March 2014 (10890)
ISCTEY progress report and power budget, with bonus TMS offsets

While Corey and Keita were aligning the TMS, I kept myself busy touching up some of the alignments and clean-up tasks on ISCTEY. The refl path and WFS paths are nominally aligned, and I've observed that without my favorite anthropogenic noise sources in the chamber, the return beam is relatively stable.

I'm working with TMS offsets of PIT 20 urad, YAW 9 urad. Not all that bad.

IR:

I adjusted the polarization on the IR Path from its initial position to something closer to the nominal power given in the ISC End Station manual.

Also, my earlier concerns about the shorted power cable damaging the BBPD appear to be unfounded... that factor of 10 I had to add to the impedance was nicely accounted for by the gain switch on the hardware PD interface, which I had completely forgotten existed.

  power
Laser output enough*
After attenuation 38.7 mW
IR mon PD 310 uW
BBPD 18.4 mW

*this power meter's filter didn't make it into the storage bag, no chance of measuring this one with the tools I have right now.

Green:

PD4 is aligned to the rejected Faraday beam. At this moment, the polarization coming from the laser in relation to the first Faraday appears to be slightly different from EX; I'm consistently measuring ~1.2% power rejected to EX's 1.9%. I've also adjusted the laser current to increase power to the chamber; I'd had it turned down to 0.97 A in an attempt to find the beatnote, and the polarization of the laser wasn't optimal for getting power into the rejection beam (it was initially about ~0.4% of input power). This may be why I was having such a hard time aligning PD4 earlier, there wasn't much there to find.

Also the REFL_A PD might need 

  power
Laser output 53 mW
After 1st Faraday 49.1 mW
On mon PD 700 uW
After 2nd Faraday 41 mW
At periscope 40 mW
At REFL_A PD 12.87 mW**

** at the PD I'm seeing flashes up to ~5 mW. Unclear if this is an alignment or calibration issue, will be tracking this down tomorrow.

H1 CDS
cyrus.reed@LIGO.ORG - posted 18:04, Thursday 20 March 2014 (10909)
CR Workstation Updates

I took advantage of an unusually quiet control room to apply updates to any available worksations.  Updates have been run on opsws1-6, opsws8-10 (vm), operator0, and vacuum1.  Additionally, opsws1-6, operator0, vacuum1 and alarm0 were moved to the new workstations subnet.

opsws0, opsws7, and operator1 still require the latest os updates.  Of these, opsws0 and operator1 still need to be moved to the workstations subnet.

H1 SEI (INS, ISC)
hugh.radkins@LIGO.ORG - posted 16:34, Thursday 20 March 2014 - last comment - 18:33, Thursday 20 March 2014(10908)
ETMY HEPI TF scheduled to run about 630pm tonight, untrip SUS & HEPI Please

If the crew leaving EndY could ensure the SUS is damped and the HEPI watchdog is untripped, it would be much appreciated.  ISI is locked and can be as is.  Thanks, Hugh

Comments related to this report
jaclyn.sanders@LIGO.ORG - 18:33, Thursday 20 March 2014 (10910)

As of 6:30 PM, HEPI watchdog is untripped and SUS is damping. She's all yours.

H1 General
jeffrey.bartlett@LIGO.ORG - posted 16:00, Thursday 20 March 2014 (10907)
Ops Summary
LVEA Laser Safe

Hugh – Adding payload to HAM5
Aaron – Pulling cables HAM3, HAM4, & BSC3
Apollo – Drilling in LEVA wall for nitrogen line installation

09:42 Keita & Corey - Working on TMS at End-Y
10:05 Sheila – Restart ITMX model 
10:26 Jim – Shutdown OAF
10:30 Richard – Adding ADC card to OAF
10:43 Hugh & Apollo – Adding Payload to HAM5 – Using Forklift
11:20 Jim - Restart OAF
12:00 Praxair – Delivering nitrogen
12:50 Filiberto – Going to End-Y and End-X to pick up items
12:50 Karen – Cleaning at End-y 
13:20 Patrick – Taking down conlog for backup
14:00 Travis – Working in SUS LVEA cleanroom
14:13 Gerardo – Working in the H2 Laser enclosure
14:33 Craig – Working in the H2-PSL
14:35 Richard – Going to End-X
15:30 Sheila – Restart ETMX model 

H1 SEI (INS)
hugh.radkins@LIGO.ORG - posted 15:45, Thursday 20 March 2014 (10906)
WHAM5 ISI Optical Table Payloaded with ~600lb iLIGO Leg Element

This completed the need for forklift action at HAM5 for the time.  The Mass was placed on six 1"x1"x1/16".  Will continue payloading (lighter stuff.)

Scott, Bubba, Hugh

H2 SEI (SEI)
mitchell.robinson@LIGO.ORG - posted 15:25, Thursday 20 March 2014 (10903)
Staging building, 3IFO (unit 2) progress
Jim, Mitchell
The down facing optical table is now parked on the granite table anxiously awaiting Apollo on Monday. The up facing is on the assembly stand also ready for action.

As for unit 2 the small and large horizontal actuators have been installed. Stage 1 doors prepped. Horizontal L4-C's have also been installed. Some of the blade bending fixtures have been added. 
H1 ISC
sheila.dwyer@LIGO.ORG - posted 15:18, Thursday 20 March 2014 (10902)
TMSX alingment

I redid the baffle PD alignment,

Baffle PD 1: 208.4P -234.0Y

Baffle PD4: 278.4P -297Y

Alinged 243.4P -265.5Y

Change from saved: +5 PIT +1 Yaw

PR3 (-245 PIT -250.3 Yaw) hasn't changed.

H1 SUS
arnaud.pele@LIGO.ORG - posted 13:57, Thursday 20 March 2014 - last comment - 15:36, Thursday 20 March 2014(10898)
ETMX L1 OSEMs

[Richard Arnaud]

This morning while taking measurements on UIM ETMX, I saw all four L1 osems readback were zeros. Looking at the past data, signal stopped at ~10:51 am PT. Richard and I went to the end station, and saw that the UIM coil driver switch was mysteriously turned off... After turning it back on, sensing and actuating now work again.

Comments related to this report
arnaud.pele@LIGO.ORG - 15:36, Thursday 20 March 2014 (10905)

Richard went back to the end station after lunch and found the hardware switch of the UIM driver turned off again, whereas nobody physically turned it off.

H1 SEI
jeffrey.bartlett@LIGO.ORG - posted 13:27, Thursday 20 March 2014 (10897)
Payload HAM5
10:45 to 12:00 Hugh and Apollo using fork lift to add payload to HAM5.
H1 CDS
patrick.thomas@LIGO.ORG - posted 13:23, Thursday 20 March 2014 - last comment - 15:12, Thursday 20 March 2014(10896)
Conlog stopped to start full backup
No channel value changes are being recorded for the duration of the backup.
Comments related to this report
patrick.thomas@LIGO.ORG - 15:12, Thursday 20 March 2014 (10901)
The good news is that the backup took only about 20 minutes. The bad news is that it took a lot longer to restart conlog. At startup, when it tried to add the last shutdown time to the database, it reported errors of the type: 'The total number of locks exceeds the lock table size' and quit. Adding 'innodb_buffer_pool_size=1G' to '/etc/mysql/my.cnf' and then restarting the computer seems to have fixed it, but I'm not sure what other implications this may have. I think I'm going to have to rethink how I record the shutdown times in the database.
H1 CDS (DAQ)
david.barker@LIGO.ORG - posted 12:22, Thursday 20 March 2014 (10895)
CDS model and DAQ restart report, Wednesday 19th March 2014

model restarts logged for Wed 19/Mar/2014
2014_03_19 15:43 h1iopsusquadtst
2014_03_19 15:52 h1iopsusquadtst
2014_03_19 18:02 h1susetmx

all restarts expected.

H1 AOS (ISC)
david.ottaway@LIGO.ORG - posted 11:54, Thursday 20 March 2014 (10879)
Schnupp Asymmetry Measurement
Dave O

I re-analyzed the data that was used to determine the PRC Length (see alog 9th March, 2014) to see whether it was possilbe to determine the losses in the PRC and hence the Schnupp Asymmetry. The results hint at the Schnupp Asymmetry being around 9.5 cm (See attached report). However the measurement will need to be re-done with the increased signal to noise that was obtained late last week to be certain.
Non-image files attached to this report
H1 CDS (SUS)
james.batch@LIGO.ORG - posted 11:49, Thursday 20 March 2014 (10894)
Additional medm directories restored
A make install has been performed for h1sustmsy, h1iopsusauxh2, h1ascimc, and h1sustmsx to restore medm directories in /opt/rtcds/lho/h1/medm.  These were not restored on Tuesday but should have been. They are not new missing directories.  I verified this against the build log and the list of missing files to see they had not been restored with the other missing files.
H1 PSL
jeffrey.bartlett@LIGO.ORG - posted 11:35, Thursday 20 March 2014 (10893)
PSL Status
Laser Status:
Output Power : 28.3w
FRONTEND WATCH is green
HPO WATCH is red

PMC: 
Locked for : 1d 18h 16m
Reflected power : 1.2w
Power Sum : 11.3w

FSS: 
Locked for : 0d 0h 55m

ISS:
Diffracted power : 13.105%
Last Saturation Event : 1d 18h 30m
H1 CDS (PEM, TCS)
james.batch@LIGO.ORG - posted 11:15, Thursday 20 March 2014 (10892)
Addition of 5th ADC to h1oaf0
WP 4517

The h1oaf0 computer was shut down to allow addition of a 5th ADC card for use by h1peml0.  

The h1iopoaf0 model was modified to add ADC4.  Card assignments to the models will be ADC0, ADC1, ADC4 to be used for h1peml0, and ADC2, ADC3 will be used for h1tcscs.  This allows the same ADC card assignments to be used at LHO and LLO for the tcscs model.  

A burtrb was done on h1tcscs before shutdown, it can be found in target/h1tcscs/h1tcscsepics/burt/h1tcscs_burt_140320_100830.snap

The h1peml0 model was modified to move ADC2 to card_num=4.
H1 General
jeffrey.bartlett@LIGO.ORG - posted 11:13, Thursday 20 March 2014 (10891)
Craning HAM5 Doors
07:30 to 08:15 Apollo craned the two HAM5 Doors in the LVEA
H1 AOS (SUS)
jeffrey.kissel@LIGO.ORG - posted 19:01, Wednesday 19 March 2014 - last comment - 13:48, Tuesday 25 March 2014(10881)
H1 ETMX Optical Lever Confusion
Has the analog whitening settings changed on the ETMX optical lever? I've compared a high-frequency spectrum with a measurement I took in February, and there's reported tons more motion above 2 [Hz], when the ISI motion is roughly equivalent if not better at these frequencies (see attached). Looks there's an extra 1:10 analog filter that's not being compensated or something...
Non-image files attached to this report
Comments related to this report
arnaud.pele@LIGO.ORG - 15:28, Thursday 20 March 2014 (10904)

Looking at a previous OPLEV spectra that was made in February on ETMX ITMX and ITMY (calibrated in urad/sqrtHz), it looks like the signal amplitude @ 10Hz (on the three of them) was similar to what you have on your red curve (~0.1 nrad/sqrtHz). Maybe the green trace (reference) was taken with a digital compensation filter engaged, but no analog whitenning ?

thomas.vo@LIGO.ORG - 13:48, Tuesday 25 March 2014 (10988)
Refer to ALOG-10267 for the changes in whitening settings on Feb 21st 2014. This accounts for the two orders of magnitude difference you see above 10 Hz.
H1 SEI
filiberto.clara@LIGO.ORG - posted 12:57, Monday 03 February 2014 - last comment - 14:24, Thursday 20 March 2014(9758)
Installation of Trillium T240 Seismometer - Ex
Installed Trillium Interface Chassis S1101837 in Rack SEI-C1 (slot U18).
Trillium was placed close to southwest side of BSC9.
Outputs from Trillium were connected to AA Chassis U30, CH21-26 (Port 5).
Trillium may need to be zero-ed.

Filiberto Clara
Comments related to this report
jeffrey.kissel@LIGO.ORG - 14:24, Thursday 20 March 2014 (10899)
The serial number of this T240 is 000531.

Also, for information about calibration and cabling layout, checkout LHO aLOG 10635.
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