Still need to do the NE Corner to close out.  HAM3 HEPI is currently FLOATING.

Michael, Keita, Dick G

We received the 4 port RF combiner today and were able to install it in the H1 electronics room. I measured 17.3 dBm going into the TTFSS LO inside the laser room with no attenuation. The common gain was lowered from 18 to 15 dB to give a UGF at 415 kHz with 55 degrees of phase margin.

We then tried to adjust the notch at 790 kHz but in the process I appeared to have crushed the variable capacitor and had to replace it. While tuning the notch back to 790 kHz with the new capacitor we noticed a peak around 1.6 MHz with a notch just off it at 1.8 MHz. We brought the notch to 1.6 MHz to compensate for this peak using a variable capacitor labeled in the attached picture.

The INI change for the h1isietmy system precipitated a mini-restartfest. We restarted the models on h1seib2, h1susb6 an h1pemey (Dolphin related) and then restarted mx streams on h1susbstst, h1susauxb6 and h1susauxh2 (mx end point related).

Mind the signs--the HEPI is unlocked so the Blue Crossbeams are floating.  Do not step on anything if possible.  I should wrap this up today after which I will relock.

The housings, crossbeams, and clamps have been installed on HAM6. It was a bit of a tight squeeze but with the help of Apollo we managed to get it done. Support tube positioning is almost complete, at which point I'll lock down the springs. One housing clamp needed a small modification, but is working well now.

I have updated the IMC master screen, namely H1IOO-MC.adl, to the laest Livingston one this morning in order to enable links for some QPDs associated with the IMC.

The IOP watchdog of H1SEIB6 was tripped due to a IPC connection error between H1SEB6 and H1SUSB6 (cf attachment). An error rate of 10samples/s (64K model) will be allowed soon.

Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot requested from 5 PM Jan. 30 to 5 PM Jan 31. Also attached are plots of the modes to show when they were running/acquiring data. Dust monitor 10 in the H1 PSL enclosure is still indicating a calibration failure.

Data taken from h1nds0.
T0=13-01-31-01-00-00; Length=86400 (s)
9780 seconds worth of data was unavailable on this server
1419.0 minutes of trend displayed

Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot requested from 5 PM Jan. 31 to 5 PM Feb. 1. Also attached are plots of the modes to show when they were running/acquiring data. Dust monitor 10 in the H1 PSL enclosure is still indicating a calibration failure.

Data taken from h1nds0.
T0=13-02-01-01-00-00; Length=86400 (s)
7740 seconds worth of data was unavailable on this server
1427.0 minutes of trend displayed

Design of isolation loops for HAM-ISIs go in 3 steps:
1) - Isolation loops level 1 :UGF=10Hz
2) - Isolation loops level 2: UGF=25Hz
3) - Isolation loops level 3: UGF=35Hz
The higher the step, the more sophisticated the control loops are.

Level 3 Isolation loops were designed, and installed, on HAM3-ISI a couple weeks ago. They were not used then.

The design of Level 3 isolation loops for HAM2-ISI was completed today. These control loops were installed and tested in cunjuction with their counterparts, running on HAM3-ISI:
- The IMC was locked right away (Gain=10dB, boost filter engaged) ~ 1.45pm PCT
- Spectra of the IMC length controls were taken, and compared with results obtained with the level 2 isolation loops (same blen filters used)

Improvements:
- Better performance in the 5Hz-10Hz range
- Better performance in low frequencies, below 200mHz

Notes:
- The IMC is still locked (5.41pm) and I am about to lower its loop gain to 0dB, just to make sure the servo does not damage anything if the IMC loses lock (requested by Giacomo & Cheryl)
- Ground motion is a bit favorable now, but not in the range of improvements, along the X-axis.
- Level 3 isolation loops will be left engaged over the weekend (see attached screenshots for Watchdog Values).

Giacamo/Cheryl worked out at IOT2R for the first part of the day with Laser Hazard (then after their work, we transitioned to Laser Safe).  This cleared up Hugo to do work on HAMISI & Barton to run measurements.

The Y Beam Manifold Spool was installed this morning.

Betsy worked on ITMy & Travis worked at Test Stand

EY BSC10 door was removed

Toppenish Middle School had an 8th Grade tour of the site (~100students)

This morning, I pulled the First Contact from ITMy-HR.  I then swapped in fresh witness plates for the ones I placed under the ITMy yesterday since I already saw particulate on them.  I did a final check over of the chamber and moved out all of my equipment.  The chamber is ready to close.

For the record, here are the weights of the glass optic, compared to the weight of the dummy we used to tune the suspension:

BS optic = 14,251g

Dummy mass = 14,180g

So, the optic hangs a bit lower in the structure than the metal dummy mass - Travis confirms this with the position error of the top BOSEMs.  We will correct this if IAS measures that we need to.

Also, FYI - a BS shipping cake tin weighs = 22,538g

Fogot to post this Wednesday.  These are the pitch/yaw numbers after Travis locked the quad pitch adjustor set screws Wednesday morning.

• Pitch: 5.0 µrad up
  • Target: 12.5 µrad up
  • Error: 7.5 µrad down
  • Tolerance: ±160.0 µrad
• Yaw: 72 µrad CCW
  • Target: 0.0 µrad
  • Error: 72 µrad CCW
  • Tolerance: ±160 µrad

All BSC8 HEPI actuators have been removed.  These may be used for BSC3 after replacing the left(NW,SE) return vertical flexible pressure lines from 30" to 41".

Attempting undamped TFs on IM1 using new script. Commissioning switch should go on and off automatically.

- Giacomo, Cheryl

Alignment of the IMC, and IM3 and IM4, increased IFO REFL from 106mW earlier this week to 147mW today, giving 90% power coupled into the IMC.  In our first measurement, the IMC alignment had drifted away from optimum, and the the IFO REFL beam was clipped on the baffle in front of IM4.

Power budget: 

• 2:58am:  6.0mag earthquake near Alaska.
• 9:09am:  Arnaud starting ITMy (BSC1) SUS Transfer Functions (at 9:09am till 11?)
• Rodruck/Apollo craning/fit checking Photon Calibrator periscopes (10-12)
• 10:30am:  Filiberto running cable around HAM3 around 10:30
• Hugh checking out issues with BSC1 HEPI Sensors
• SUS gave ok, so tomorrow (Fri), Spool & BSC1 door can be installed
• FMCS alarms:  EY Temperature (temperature heading over 75deg [from 69deg]) & MX Air Handler