Attached are plots of dust counts requested from 5 PM June 9 to 5 PM June 10.

Both the dust monitor at location 14 in the LVEA (H2 PSL enclosure) and the dust monitor at location 16 in the LVEA (H1 PSL anteroom) are indicating calibration failures.

8:42 Praxair delivery
Cleaning at end X
The BSC9 ISI was moved onto the test stand at end X.
10:00 Kiwamu I. transitioned the LVEA to laser safe to allow Filiberto C. to pull power cables to ISCT1. (WP 3966)
11:12 Paradise water delivery
11:59 Mark B. restarted the h1susauxh2 model. (WP 3967)
Cyrus R. and Jim B. went to end Y to connect the reflected memory switch to the corner station. Dave B. changed the IOP models on iscey and lsc0 to turn on the RFM DMA. Chris W. modified the h1iscey and h1lsc models to use the RFM IPC. Dave B. then restarted all the models on these frontends. (WP 3963)
Dave B. reconfigured broadcast0 to add channels to DMT monitoring for HIFO Y. (WP 3961)
12:34 The DAQ was restarted.
1:04 The DAQ was restarted to add Ethercat channels.
1:15 The DAQ was restarted after removing duplicate Ethercat channels.
Kyle replaced a leaking 2.75 CFF gasket on the GV1 plumbing. (WP 3968)
1:37 The DAQ was restarted.
Jim B. went to mid X to remove the IRIG-B from h1pemmx and move the timing signal from the fan-out to the IO chassis. Did not work, reverted to slightly modified original configuration. (WP 3969) (see alog below)
Mark L. went to end Y to see if power cabling needed to be removed tomorrow.
Thomas V. to align the optical levers for ITMY and PR3.
Michael R. transitioned the LVEA to laser hazard.

Last week, I tried to evaluate the best configuration to use the sensor correction (HEPI vs ISI) and the influence of the ISI stage 1 blend frequency (CPS-T240-L4C) on the isolation once the sensor correction is engaged on the ISI.

The stage 1 motion was measured in different control configurations:
- HEPI controlled in position (UGF 5Hz), ISI – Isolation Level 3 (40Hz UGF on stage 1 – 15Hz on stage 2) – Blend 250mHz (with T240s in stage 1 super sensors)
- HEPI controlled in position (UGF 5Hz) with sensor correction from STS-2 to HEPI, ISI – Isolation Level 3 (40Hz UGF on stage 1 – 15Hz on stage 2) – Blend 250mHz (with T240s)
- HEPI controlled in position (UGF 5Hz), ISI – Isolation Level 3 (40Hz UGF on stage 1 – 15Hz on stage 2) – Blend 250mHz (with T240s) and sensor correction from STS-2 to Stage 1
- HEPI controlled in position (UGF 5Hz), ISI – Isolation Level 3 (40Hz UGF on stage 1 – 15Hz on stage 2) – Blend 750mHz (with T240s) and sensor correction from STS-2 to Stage 1
- HEPI controlled in position (UGF 5Hz) with sensor correction from STS-2 to HEPI, ISI – Isolation Level 3 (40Hz UGF on stage 1 – 15Hz on stage 2) – Blend 750mHz (with T240s)
- HEPI with IPS-L4C blend (UGF 10Hz) with sensor correction from STS-2 to HEPI, ISI – Isolation Level 3 (40Hz UGF on stage 1 – 15Hz on stage 2) – Blend 250mHz (with T240s)

Below 100mHz
- The amplification at low frequency seems to be more important when the sensor correction is implemented on HEPI (probably due to the tilt - twist of the HEPI structure). The effect is more visible in the horizontal directions.
  red & cyan (Sensor correction on the stage 1 ISI) vs purple & gold (Sensor correction on the HEPI)
- With the sensor correction implemented on the ISI, the amplification seems to be lower when the blend frequency (CPS-T240) is higher
  cyan (750mHz blend) vs red (250mHz blend)

[100mHz;2Hz]
- When the T240s and the CPSs are blended at 250mHz, sensor correction implemented in HEPI or ISI performs similarly (with SC on the ISI, isolation seems slightly better)
  red (SC on the ISI) vs purple (SC on the HEPI)
- The SC performs better when the blend frequency (CPS-T240) is increased at 750mHz. Are we reinjecting more noise or tilt when the CPS-T240 are blended at 250mHz? The Q of the low pass filter at 750mHz also has lower than the Q of the 250mHz low pass filter. It might also explain the difference of isolation around 200mHz.
  cyan (750mHz) vs red (250mHz)
- The smallest stage 1 motion is obtained when the HEPI is controlled with the IPS-L4C blend
  gold

Above 2Hz
-  Isolation is slightly better (at 2Hz) when the HEPI is controlled with the IPSs and the L4Cs.
   gold
-  When the T240s and the CPSs are blended at 750mHz, the isolation is limited due to the lack of “roll off” of the CPS low pass filters.
   cyan

Regarding these results, it seems that the sensor correction works better at low frequency (below 2Hz) when it is implemented on stage 1 (vs HEPI). Further measurements need to be performed to determine the effect of the blend filters with sensor correction on the isolation.

Tested a configuration for h1pemmx in which the timing for the I/O chassis was connected directly to the master fanout with a single-mode fiber, and the IRIG-B card removed from the front-end computer.  This would have allowed us to not use a timing fanout and IRIG-B fanout at the mid station for a single computer.

This test failed, running the front-end computer with no IRIG-B card installed caused the IOP model to have a 0x4000 status (timing error) and the state word also indicated a timing error. 

I reinstalled the IRIG-B card in the computer, and restored the timing system connections to their original state.  Single-mode fiber to the timing fanout at MX, multi-mode fiber connect the I/O chassis and the IRIG-B fanout, and coax cable connecting the IRIG-B fanout to the IRIG-B card in the front-end computer.  Had difficulty getting the IRIG-B card to read the correct time, eventually moved the connection to the middle card in the fanout where it sync'd up without problem.

WP3963. Jim, Cyrus and Dave. The 5595 RFM switches in the MSR and EY computer racks were connected to each other with single mode fiber optics cable. The ports used on the long haul patch panels were in conformance with Richard's drawing. The order of the front ends on the Y arm loop and node ids were verified. To permit DMA transfer of RFM data, the IOP models h1iopiscey and h1ioplsc0 were modified to add the rfm_dma flag to the CDS part. All models on these two front ends were restarted. Chris W modifed the h1iscey and h1lsc models to use RFM IPC and verified this is working. One problem he encountered was a build error with the h1lsc model, it uses RFM CARD=1 while h1iscey uses RFM CARD=0. A work around suggested by Rolf is to force h1iscey to use CARD=1 even though there is only one physical card, this fixed the error. This closes WP3963.

WP3961. The DAQ broadcaster was reconfigured to add a large number of DAQ channels needed for the DMT monitoring of the H1IFOY run. This closes WP3961.

ECAT EDCU. The DAQ was reconfigured to add three ECAT EDCU INI files, adding about 3,300 slow channels to the DAQ.

To support the above changes and other user changes, the DAQ was restarted multiple times today.

May also have a leak in GV1's bonnet annulus seal -> will follow up

Changed etmy model per request by isc team :

• deleted the recently created link H1:ISCEY-SUS-ETMY_LONG in etmy model coming from iscey model (cf picture 1)
• replaced it by the copied H1:LSC-ETMY_L_SUSETMY from lsc model (cf picture 2 and 3)

Per WP 3967, I edited the h1susauxh2 model to remove blocks PR3OL and H2OL which were generating spurious signals 

H1:SUS-PR3OL_PR3OpLev_UL/LL/UR/LR

and 

H1:SUS-H2OL_H2OL_UL/LL/UR/LR

These had always been nonsense because the physical OL quadrant signals weren't even plumbed into the h1susauxh2 chassis for the h1susauxh2 model to read them. Rather, they were going into a different, non-aux chassis, h1sus2b, and the correct digital signals were already being generated by user model h1susim as H1:SUS-PR3_M3_OPLEV_SEG1/2/3/4_IN1 and H1:ISI-HAM2_OPLEV_QUAD1/2/3/4_IN1.

ETMY:
I have attached spectra of ETMY stage 2 motion in the Y direction measured during the single arm and a month ago while working on a new set of filters. Isolation was improved except around 1Hz (Blend filters are different) but stage 2 motion is close from the requirements. It is a better tradeoff.

The conditions of the measurements are specified below:

OAT:
- ISI
    - Damping
    - UGF 15Hz on all DOFs
    - Stage 1 Blend frequency at 100mHz with T240s in super sensors in X, Y and blend frequency at 750mHz in the other directions
    - Stage 2 Blend frequency at 250mHz in X, Y and blend frequency at 750mHz in the other directions

- HEPI
    - IPS-L4C blend frequency at 800mHz in all DOFs
    - UGF 10Hz on all DOFs
    - Sensor correction in X, Y and Z directions

2013 05 14 - Measurements starting at 1052610960 - 100s sample - 10 averages - 50% overlap
- ISI
    - Damping
    - UGF 40Hz on all DOFs of stage 1 and 32Hz in all DOFs of stage 2
    - Stage 1 Blend frequency at 250mHz with T240s in super sensors (all DOFs)
    - Stage 2 Blend frequency at 250mHz (all DOFs)
    - Sensor correction from ground (STS-2) to stage 1 in the X, Y and Z directions
    - Sensor correction from stage 1 (T240s) to stage 2 in the X, Y and Z directions

- HEPI
    - Pure position control - No blend
    - UGF 100mHz on all DOFs
    - No sensor correction

ITMY:
Damping and isolation filters installed on BSC1 (ITMY) are those installed during the OAT (minor tweaks were necessary since HEPI is locked). Isolation performance is similar to OAT. New set of filters will be designed when the HEPI will be unlocked.

Found x1fe3 and x1seiham front end computers to be non-responsive.  Rebooted both, they appeared to start normally and run their models OK.

These will be used during Initial Alignment.  It isn't a big deal if these get bumped for now but we don't want them damaged.  Please be careful.

No issues to report here.  The ISI is on the Test Stand shifted south one set of holes (7".)  Like EndY, this is to accommodate the TMS installation.  Let us know soon if this is not appropriate.

This is a log-log plot with a 1/t curve superimposed with exponent of 0.85. Also shown is a zoom in of the last 10 days.

It appears that we have cleared up some virtual leaks(annuli?) in our pumping exercises.

Attached are plots of oplev signals of ETMY and ITMY, as well as the arm cavity reflected power (ALS-Y_REFL_B_LF_OUT).
Plot 1 shows the signals in lock.
Plot 2 is a time series in lock.
Plot 3 shows the same signals as plot 1, but out of lock.
Note that neither channel is properly calibrated yet. (TBD)

Conclusion:
- The limiting peaks are ~0.44Hz and ~0.55Hz.
- Both ETMY and ITMY show the motion.
- Our slow feed-back of the length signal to ETMY M0 makes them worse for ETMY in-lock.

Started transfer functions measurements with DTT on MC2 for M2 and M3 masses. ISI is damped. Lock filters and alignment offsets have been turned off.

(Alexa, Kiwamu, Daniel, Stefan)

Since the HAM1 was leveled, we first fine-tweaked the PR3 alignment to maximize the ALS-C_TRY_A_DC signal.
New PR3 alignment: P:-150, Y:125 (i.e. we moved -5ct in pitch). We have not re-tweaked the IR beam.

Then we build the beat node path on ISCT1. Daniel fixed the SHG TEC (I have not idea how). So far we only used Kiwamu's pre-calculated mode-matching solution, without fine-tweaking it. We had to steel a power supply diode from a neighboring table to power the 18V needed for the broad-band PD. (Needs its own power cable.)

With all that we got a nice beat-node up to 100mVpkk (out of about 600mVpkk that we guess from a back-of-the-envelope estimate). Still room for improvement. Most importantly though, the beam was fluctuating a lot. We need to revisit the ETM and ITM suspensions/ISIs.

Also I did fine-tweak the transmission monitor table (TMTS) alignment slightly in pitch to reduce the arm intensity fluctuations: from -14400 to -13820 counts.
The arm is still moving too much tough.

To do next:
- Stabilize the ETM and ITM to reduce arm motion
- Measure beam profile out of the corner SHG
- Measure beam profile out of the arm
- Wire the beat node PD's power cable
- Configure the electronics for feeding back to the input mode cleaner CM board.


On that note: We should really change our nomenclature for the "Common Mode Board". The name is purely historical. We have so many of those now, and most of them have very little to do with a "common mode". My proposal: the "Sigg Servo Board"...

• Green laser at EY was shuttered for SEI work in LVEA. IO and ALS light pipes were shuttered as well.
• Shutters open at 2:30, HIFO work ongoing.
• Thomas working on optical lever at EY
• Hugh picking up parts at EY

The fluid analysis for EndX after flushing for almost 5 weeks can be found at T1300527.  All the LHO HEPI Fluid Analyses can be found at T1300521.

Arnaud started MC1/MC2/MC3 M2/M3 TFs on Friday, but they were interrupted by Saturday commissioning activity. It appears they were in the middle of MC1 M3 when they were stopped, so I'm restarting them there shortly. Commissioning has priority so text/email me if you need them shut down.