After this morning's adventure with the ETMX UIM driver, and thanks to Richard's help to fix it, I could take UIM to test mass pitch and yaw transfer functions. Drivealign filters were then designed in the same manner as Keita with the measurements from this morning. The last two pdf show the filter design, with the filter in cyan.

They are now installed in the L1 P2P and Y2Y drivealign matrix filterbank with a gain of 1, but need to be tested.

UIM data used for the fitting are under the svn and located in :

/ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ETMX/SAGL1/Data
2014-03-20_H1SUSETMX_P2PY_WhiteNoise.xml
2014-03-20_H1SUSETMX_Y2PY_WhiteNoise.xml

Since the top mass P2P and Y2Y drivealign filters disappeared, I reinstalled them, and the first two pdfs are showing the design.

Arnaud, Sheila

Today we worked on the OpLev damping more, including making the modification to the etmx and Itmx models needed to route the damping through the drivealign matrix for both PUM and UIM.  These models (h1susetmx and h1susitmx) committed to svn.

The problem with the pitch loop saturating the DAC was the high frequency noise, as Keita suggested.  I added a low pass at 10 Hz, and now the loop runs with the intended gain without saturating the DAC.  The first screen shot attached shows the coil driver outputs with the loop in last night's configuration (dashed lines), and with both PIT and YAW damping loops engaged (solid lines).  (The max is 130000 counts). 

The next plot shows the performance of these loops (blue is both loops on, red is neither on).  We get a factor of 5 improvement at 0.45 Hz in Pitch, and a factor of 10 at 0.13 Hz in Yaw.  The Pitch RMS is reduced by 60%, while Yaw rms is reduced by 50%.  

The Pitch loop gain is half of what I had originally indented, the current set up is shown in the attached screen shot. 

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.

*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 

** 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.

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.

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

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 

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

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. 

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.

[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.

10:45 to 12:00 Hugh and Apollo using fork lift to add payload to HAM5.

No channel value changes are being recorded for the duration of the backup.

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.

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.

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.

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...

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