With phone help from Bram, I reset  SUS, ISI and HPI,  which had tripped in the middle of the night, and relocked the arm. Low power though.

Attached are plots of dust counts > .5 microns in particles per cubic foot.

I have placed a dust monitor in the clean room at end X. It is set to location 1.

Reset the watchs dogs for ITM SUS, ISI and HEPI (needed to zero the ITM dc alignemtents).

I did a quick dither alignment of the TM to the laser beam.

I engaged the ISI isolation on both ITM and ETM (I think they don't have the boost on), and enabled the offload to the ETM HEPI.

attached are a spectrum and a striptool.

All is running smoothly.

In the H2 FMY suspension the USER DACKILL has white screens. I am not even sure if the damping feedback is going out to the suspension or not.

I would not be able to reset this if it had tripped. Would be nice if this can be fixed.

Removed the 90/10 beam splitter in front of the RF LSC diode, and replaced it with a 50/50 beam splitter. Adjusted the gain to set the UGF to ~300 kHz. I tried to insert a ND filter to see if the 2.74 Hz peak disappears, but don't have a conclusive result yet.

Progress on the leak testing of the Vertex has been hampered due to the prevalence of "very" loose bolts on 80% of the flanges on the GNB provided MC spools.  After finding that 12 of the first 15 flanges tested were leaking badly I ceased spraying any additional helium and, instead, torqued the bolts on the flanges which were leaking.  This was very time consuming and was not "on the schedule" but did manage to demonstrate that the majority of leaking flanges could be made leak tight by doing this. 

I will propose that all of the GNB joints (leaking and not yet leaking) be torqued on Monday (Apollo help?) before continuing on with the helium leak testing. 

Aug. 3 OPS:

Start of the day: 
ISI tripped on ETMY - HEPI tripped on ITMY - Vincent looking into it, Bram emailed

Work going on:
craning arm to install on HAM3
Filiberto to EY to pull network cable
Karen to LVEA to clean
Patrick working in the NYN room
Patrick to EX to install dust monitor
Eric to HAM2 to install hardware on actuators
Kyle to EY - retrieving equipment from VEA
Alex to EY - inventory in TMS lab
Michael R. to EY TMS lab to verify tagged out lasers
Doug to HAM3 optics table to measure some threaded hole diameters
Karen and Chris to EY to clean
HAM3 has an ARM attached to it

[Jeff Bartlett and Andres Ramirez]

After replacing a broken magnet on the H1-MC3 intermediate mass, we ran Phase 1b transfer function. The results showed a rubbing issue at the side and left BOSEMs on the M1 Level, (2012-07-30_2100_X1SUSMC3_M1_ALL_TFs). While looking for something rubbing on the upper mass (which we did not find), discovered the T3 BOSEM showed no voltage, which was traced back to a loose connection at the D25 end of the cable. After reseating the cable, the SpeedDials values still did not look right. We reran the Open Light script for T3. The Open Light voltages were OK; the Offset and Gain values in MEDM were not correct. We reran the Open Light script for all the BOSEMs and adjusted the MEDM offsets and gains as necessary. 

We reran the transfer functions this morning (2012-08-03_0730_X1SUSMC3_M1_ALL_TFs), the results look much better. Requesting final approval for metal build of H1-MC3.    

[Elli and Bram]

After the OAT RefCav work, we relocked the PLL in EY. We had to tune the laser crystal temperature up to 42.27 degC (from 42.08 degC). We also teaked the waveplate, setting the beatnote power to -31dB.

I had a look at the refernce cavity today to see where we losing our gain. Initially I tweaked the alignment increasing it by approximately 10%, the 01-mode is now much dimmer on the monitor (I didn't do a scanning alignment, and tried to kept the cavity locked).

Also, I rotated the QWP just infront of the cavity to maximise the power on the RF LSC diode. In the beam just after the PBS, which taps the beam for the RF LSC diode, is a ~90/10 beam splitter (unlabelled), directing 90% of the beam to a CCD camera! Due to a lack of looking for a smaller splitting ratio beam splitter I left it inplace, so we now geting ~4 mW onto the RF LSC diode (of the 34.4 mW available in the return beam).

I dropped lock, so I could measure the power. Into the cavity is 46 mW, reflected is (out of the PBS) 34 mW. I measured the power incident on the transmitted diode but forgot to measure the total power transmitted! There is 4 mW on the RF LSC diode (reading 169 mV at the DC output). Once locked the power drops to 40 mV out of the DC output.

The UGF is 287 kHz, with the folowing Interface Settings

It runs with Common at 850 and Fast at 700 (UGF 315 kHz), but it becomes more sensitive to bumping and floor motion and starts to oscillate.

You can recover from the oscillation by reducing the Common gain to below 160, and bring it back up.

The relock of the RefCav is at a slightly different mode, asI tweaked the coarse tuning down wards to find the 00-mode. There is 210 micro Watts on the transmitted diode, reading ~828 mV (it has a gain setting of 20 dB).

Attached are plots of dust counts > .5 microns in particles per cubic foot. The dust monitor at location 8 in the LVEA (H0:PEM-LVEA_DST8_5) was put in the assembly prep area near HAM2 and HAM3.

Vincent finished installing the HEPI system. Because the ISC signals are now added into the HEPI feedback just after the compensation filters, the gain and sign have changed.

Now we have a gain of -2 (from +0.2). Also the units are not in nm anymore .... not a drama but makes thinking about limits a bit harder ...

I engaged the ISI isolation on ITM, but the ETM kept tripping so I left it in damping only (didn't further investigate).

Left the cavity locked for the night.

Kyle 

With the leak detector configuration as left yesterday, i.e. backing the Vertex MTP (100% of the turbo exhaust) the helium background had decreased from 1.3 x 10-8 torr*L/sec (as left yesterday) to 6.2 x 10-9 torr*L/sec today -> I vented the HAM5 and HAM6 annulus volume and decoupled the HAM5 aux. pump components leaving the pump port connection open to the room.  Then I let the HAM6 aux. cart diaphram backing pump pump air through the annulus, i.e. room air enters HAM5 pump port and routes through annulus volume and exits HAM6 pump port.  This was another attempt to expedite removal of any helium permeated in the annulus O-rings -> No help, too slow.  Next I calibrated our 2nd leak detector and swapped it in place of the initial leak detector -> No change.  It measured and behaved within 10% of the first.  This was done to rule out any instrument-specific inability the initial leak detector might have had in resolving helium ions from non-helium ions in the spec. tube (as the leak detector inlet pressure is relatively "high" baking the MTP).  This concludes my attempt to get the helium background to the nominal <2 x 10-9 torr*L/sec value.  

Moving on, I reconnected the initial leak detector and began testing CF joints on the output MC tube with a background of 6.2 x 10-9 torr*L/sec.  Two of the first three flanges I tested were 10-6 range leakers!! Ouch!!  Will have to continue tomorrow after this pumps away.  

Day's Activities:

Since there was not OAT activities during the day, this allowed for noisy activities in the LVEA/EY.

• HAM3 Survey work started off the morning
• Chris/Karen given ok for LVEA vacuuming
• Apollo crew were craning around ISC tables
• Vincent reconfiguring HEPI model for filter name changes
• Betsy turned on PR2 Damping
• Szymon did some ETMy SUS measurements earlier in the day
• Robert/Richard addressed a "noisy" transformer at EY
• SEI crew removed mass from HAM3 via forklift
• SUS crew staging to mount Installation Arm on HAM3
• Apollo busy down at EX (removing doors from BSC9, and staging for In-Chamber cleaning)
• YMCA Tour in the afternoon

This morning, the HEPI master model was updated, corrected and committed. The two HEPI models (BSC6 and BSC8) were recompiled, re-installed, restarted and restored. The safe burt snapshots were updated. Bram was able to lock the cavity with the new configuration.
Note that the Yaw offset is now introduced in the DC_BIAS and the ISCMON filter output signals are not going through the isolation filters.
Now, ISC signals can be read by the HEPI models using the reflective memory.

Jeff K. , Thomas V.

Below are the calibration parameters for the H2 ITMY Optical Lever:
        Slope          Y-intercept
Pitch [ 580.41229822  -11.51774017]
Yaw  [ 689.70532274  -13.3345144 ]


And here are the calibration parameters for the H2 ETMY Optical Lever:
         Slope           Y-intercept 
Pitch [ 1666.80728788   -33.14694715]
Yaw  [ 1727.67131855     23.41350328]

Both sets of calibrations were attained via the same process of moving the QPD along a translation stage and measuring the output signal.  All four sets of slopes are in units of radian*meters.

OK now we have all the HEPI Actuators attached & released at the correct elevation and IAS has signed off on the position.

Elevation & level is 0.1mm below nominal of -250.5mm (wrt LIGO Global) with a +-0.1mm levelness.

Attached is my field notes of the final dial indicator readings and the level survey-enjoy.

Thanks to Mitchell & Jason