We have found that the polarization of PDH/WFS path was totally bogus because of one HWP somebody has installed, and that was the reason why the green 50:50 S-pol splitter was giving us something like 20:80. We rotated the HWP such that 50:50 becomes 50:50-ish, but that also means that 80:20 splitter to separate PDH and WFS was also affected.

Before: 4.4mW or so going into PDH, 4.8mW into WFS (0.9mW WFSA and the rest WFSB).

After: 8.2mW for PDH, 1.2mW for WFS (0.6mW WFSA, 0.6mW WFSB).

Tomorrow we'll remove the HWP as it is not in the design.

During green WFS RF check we've found that the PDH modulation frequency was set to 23.387319MHz , which is 1.002MHz off of our previously set frequency 24.389319 MHz (see alog 9708 when it was set last time). Strange.

Added APPSROOT environment variable to the default user environment with a value of either /ligo/apps/linux-x86_64 or /ligo/apps/darwin-x86_64 as appropriate.  Also fixed MANPATH environment variable value so it also points to system man pages.

Here is the list of commissioning task for the next 7-14 days:

Green team:

• Hand-off to red
• Noise measurement between red and green locked on red.
• Make a mode scan of the red resonances.
• ETM drive diagonalization for length and angle.
• ITM drive diagonalization for angle.
• Commission the length feedback path to the ETM top suspension point to suppress microseism.
• Camera for ITMX face view (possible?)

Red team:

• Center the red QPDs in EX.
• Investigate the robustness of the 3f lock in presence of an arm cavity.
• Start commissioning the alignment system. REFL_A commissioning.
• Optimize the thermal compensation of ITMY.
• Investigate the REFLAIR45 whitening filter issue.

Blue team (ALS WFS):

• Test electrical connections.
• Use AM laser to test RF signal chain.
• Beam quality investigation.
• Measure sensing matrix.

Blue team (ISCTEY, delayed):

• Prepare second set of WFS Complete the feedthrough panels.
• Install the on table cabling.
• Prepare for move to the end station.
• Check out ALS electronics in EY.
• Add WFS.

TMS:

• Ground loop investigation.
• Beam alignment in final position.

SEI/SUS team:

• Improve stability under high performance for ETMX.

This morning, with a little help from Hugh, I finished preparing the ISI for chamberside check out. I replaced the bad St1H3 cps, fixed some cable routing issues, then floated and balanced the stages. All went relatively painless, aside from the chaotic, cramped quarters in the end station (cables EVERYWHERE!). Now, all the sensors seem functional and I've started running some basic tests. Should be starting on tf's soon.

Working on unlocking SR2 suspension. 

The default nds server is now h1nds1 for new applications that use it.  It had been moved to h1nds0 temporarily to allow maintenance on h1fw1.

Jim and Dave

Jim removed the unneeded second 16bit DAC card from the h1lsc0 IO Chassis this morning, starting at 10:21. I made the appropriate model change to h1ioplsc0.mdl (userapps SVN r7165).

This closes WP4446

I swtiched the stage one blends on ETMX back to Tcrappy, Attached is a screen shot of the opLevs, in units of urad, the green references are from before (stage 1 level 3, 250mHz blends, stage 2 level2 Tcrappy).  The red is now, with Tcrappy on both stages. 

With the 250s, the Pitch rms is 0.7urad with the 250s, with tcrappy it is 0.5urad rms.  (At the same times, the ITM rms is ust under 0.3 urad)

This is saved as sheila.dwyer/ALS/HIFOX/ISIs/TcrappyFeb18.xml

Filiburto replaced the DC power supply in h1susauxh56's IO Chassis. We restarted the front end and all looks good with this system.

11:02 and 11:06 DAQ restarts due to following changes

• new h1ioplsc0 model (minus second DAC card)
• new h1iscex model from Daniel
• new H1BROADCAST.ini file with John Z's latest list

The second restart was due to duplicate channels in the DMT broadcast. The number of channels this system handles went from 271 to 854.

EDCU is PURPLE due to Guardian changes, Jamie will produce a new H1EDCU_GRD.ini file when his changes are complete.

h1ecatc1 seemed to be running, but nothing was getting to epics.  When I tried to login to PLC2 the PLC control crashed. I restarted the machine, and reran the install scripts, but the PLC control keeps crashing.

We also got the message callBackRequest: cbLow ring buffer fulll

Daniel fixed the problem by reseting each PLC, deleting the target directories, and re running the install scripts.  When he did that, the PLC Control were still crashing, at which point he used the restart button in the lower right hand corner to restart the system. 

Now things seem to be back. 

I burted all three PLCs to 11:00on feb 14th (Friday)

Power down H1LSC to fulfill Work Permit #4446 (remove a DAC card from IO Chassis) and also restart ISC EX model

Working on SR3

Looking at the ELIGO TCS viewport

Passing on a note sent to LHO Operators with regards to the FOMs.  If you have suggestions/desires for what we want/removed on these FOMs please let Dave B. or myself know.

Note on FOMs for Operators:

The Wall TV Screens (aka FOMs) have been approaching a state where what we want on them is becoming useful and consistent.  As part of a shift task, let's make sure these Screens look good.  Once we have a Checksheet, we'll be sure to add checking the FOMs on it.

The ALS-X BBPD appears to have gone dark around 2:30 PST on Friday.  The EX laser IR PD and fiber monitor PDs appear to have been disturbed around the same time, but they have recovered.

Possibly this is related to Friday's work on installing WFS on the ISCTEX table, or the related editing of the X-end simulink models.

I temporarily installed a modal damping filter on the longitudinal degree of freedom of ETMX. The filter has 32 poles, so it is split between two modules, 'md_part1' and 'md_part2'. I plan to measure ringdown times of the test mass tomorrow using the green cavity signal. This is part of an effort to see what are the fastest possible ringdown times of the test mass with top mass damping. After the test I will remove the filters.

Normally a modal damping filter wouldn't need this many poles, but I decided to include the pitch dynamics in the estimator to get a more faithful reproduction of the 1st longitudinal mode frequency for this test.