Maintenance: Reset HEPI overflow counters for HAM3, HAM4, ITMX, and BS.

Andres reported that the analog video feeds in the control room weren't working.  The matrix switcher in the MSR was plugged in, but did not appear to have power.  I unplugged it, waited a few seconds, and plugged it back in and it powered up.  There was nothing that looked amiss with the power supply module or any of the boards accessible from the front of the chassis.  It may have been a power glitch, or the power supply is getting flaky in it's old age.  It appears to be a modular type under the cover, so it may be easy to replace if needed if it is still available commercially.

Crystal chiller has been refilled (added 250 ml of water to bring the level up to maximum)

J. Kissel, K. Venkateswara

Because we continue to find the reference mirror signal -- a proxy for the autocollimator noise -- to be a useful signal to judge where the Beam Rotation Sensor's noise floor lies, we've output this channel out of the laptop's DAC, and piped it into the H1 ISI EX ADC on Channel ADC_0_29, and stored it in the science frames at 256 [Hz]. We expect the reference mirror to be stable, so we've not applied the very-low-frequency 1 [mHz] high-pass, but otherwise the calibration of the signal is identical to that of the beam balance mirror (see 13448):
3.5e-6 [rad/pixel] * 1 [pixels/V_sing] * 1/2 [V_sing / V_diff] * 40/2^16 [V_diff/ct] * 1e9 [nrad/rad] =  1.0681 [nrad/ct]
This gain, called "cts2nrad" has been installed into FM1 of the H1:ISI-GND_BRS_ETMX_REF filter bank, as with the beam balance mirror.


This required a recompile, reinstall, restart, and restore of the H1ISIETMX. We have not yet reboot the frame builder, so it remains with a 0x2000 status until the next DAQ restart at a more convenient time. I've committed the changes both the top-level h1isietmx.mdl model, and the H1ISIETMX.txt filter file to the userapps repo. We haven't yet added the filter bank to the BRS screen, but we'll get there.

WP 4790 - The default NDS server has been changed back to h1nds1 for the control room workstations.  This affect new logins or new shells. Existing shells and programs should not be affected.

Attendees: Fred, Richard, Robert, Daniel, Keita, Patrick, Ed, John, Jodi, Jim, Jeff, Kori, Travis, Gerardo, etc 

Today's Tasks:

•	H1 EX BRS Installation/ More debugging and data analysis - Krishna
•	ETMY HEPI/Chamber system B-K Hammering work continues- Jeff K/T MacDonald
•	Cable work at corner station – Richard
•	3IFO (Quad #9) assembly continues in Staging Building – Jeff B.
•	Staging Building/Setting up computer for Quad9 testing – Arnaud

Daniel, Jim, Dave

The status of the Beckhoff IOCs was missing from the control room. This was highlighted by their slow recovery following the power outage last week. As a first attempt to make them more visible, I have added their current time EPICS channels to the CDS STATE_WORD overview MEDMS (large and small versions). This immediately paid off, as we found the end station IOCs were not actually running, Daniel restarted them. We also noticed the OPI computers' times were off from each other by 2 seconds, so we need to NTP these machines today.

Hopefully better diagnostic channels, like UPTIME, can replace the current time on the overviews.

For the purposes of integrating Beckhoff "front ends" with the DAQ FE, I'm going to make a "GDS" screen per PLC which gives top level status info like STARTTIME, CODELIST, etc.

model restarts logged for Mon 18/Aug/2014
2014_08_18 10:20 h1fw1
2014_08_18 21:02 h1fw1

both restarts unexpected. First restart linked to firmware bug in sataboy, second restart not related to any other activities.

J. Kissel, T. MacDonald

We've finally collected our "money" data set on ETMX HEPI/Chamber system -- and a quick look at the mode shape at 8 [Hz] reveals that this motion is the two crossbeams moving in concert along the beam direction (see ETMX_HPI_8Hz.avi). However, contrary to popular belief, this mode does *not* really involve the piers, the slab, or the chamber. 

Excited by the result (no pun intended), and having a measurement method and system nailed down, we packed up and high-tailed it to ETMY. We took the identical measurement there, and got the same exact mode shape (see ETMY_HPI_8Hz.avi). So it's systematic to the HPI/Crossbeam system, as has been indicated by the good Dr. Nuttall's work (see, e.g. G1400858). You'll notice that three data points on the cross-beam in the distance are exactly out of phase with everything else -- this is a measurement artifact: due to access issues (the chamber work platform is still set up at EY), so I had to hit that cross-beam from the opposite site (we're looking into whether we can somehow just invert the phase of those few data points with the B&K software).

This settles the argument as to what I've moving at 8 [Hz] here at the sites!

Now that we've got the result we want, and a whole lot more data to work with (we have modal information with 0.5 [Hz] resolution up to hundreds of [Hz]), we're going to use the one day two days that Tim has left to take finer resolution data on the horizontal cross beam / pier top / HPI boot system to nail down the exact mode shape so we can consider ways to *fix* it.

(Again there's too much data to export at the moment, and this can easily be done offline -- which Tim will do back at Stanford, but stay tuned for more fun results!)

[Dan, Alexa, Koji]

We measured the beam geometry on HAM6 after the rotation of the septum window.
The new beam is actually going up by 1.9mrad, in stead of previous going down by 4.3mrad.
The beam height entering HAM6 is too low from the beginning, this upward angle gives us
the right height of the spot on OM1 in sub-milimeter presicion. In the horizontal projection,
The new beam is almost overwrapped with the designed path.

Attachment 1: Measured height of the beam on the HAM6 table.

Attachment 2: Summary of the beam geometry.

AS, KA, DH

As part of the HAM6 alignment work, we used OM1 to center the beam on OM2, and adjusted the OSEMs to the proper half-open-light values.

Thanks to the rotation of the septum window by Keita et al., the beam was well-centered on OM1 (see Koji's post on the new beam alignment in the chamber).  We had to perform some not-so-gentle manipulations of the pitch adjustment screw at the bottom of the mirror holder to get the OM1 mirror to pitch enough forward that the beam was centered on OM2.  In the end this required the use of an extra class-A nut to properly balance the mirror, and the removal of the tip-tilt's backplane (which holds the OSEMs) to allow us to access the mirror holder (and the screw hole) from the back.  There were some tense moments of tip-tilt frustration, but in the end the screw+nut combination was just right for the pitch adjustment.

Once the beam to OM2 was aligned we checked the OMEM DC values and adjusted LL and LR to center the flags.  The flag of the LL magnet is no longer touching the side of the OSEM (although it is close).  The attached spectrum shows the OSEM signals for OM1; the mirror is free, the damping works, the beam is in the right place, we are happy.

J. Kissel, K. Venkateswara

This morning I modified the laptop code to write two additional channels into aLIGO DAQ: One writes the tilt channel but with a lower gain such that it covers the entire range of the CCD. Obviously this doesn't reach the full sensitivity of the autocollimator but is useful as a diagnostic check on the DC position of the balance. The high-passed tilt channel doesn't give that information. The second channel, I added, writes the reference mirror position.

I also noticed today that the Ion pump current was at 0.48 mA this morning, whereas it was about 0.38 mA on Saturday evening. It continued to rise to about 0.58 mA by today evening but appears to be leveling off. It may be an effect of 'saturation' of the pump. We will know by tomorrow, when we look at the trend.

I also did a quick look at the data from the weekend and I've attached a couple of graphs. The first is from ~10k seconds on late Saturday night-early Sunday morning, when the ground was very quiet. There appears to be some excess noise in the BRS channel between 10 to 60 mHz, which is not tilt. Additionally, there are lines present at the harmonics of the beam resonance, due to small non-linearities in the read out. On Sunday night around 8:30 PM, there was an earthquake which shows up clearly in the T240 data, but is not visible in the BRS data. The second plot shows the ASD of 10k seconds during that period. This is preliminary and I'll do some better analysis soon.

(Koji, Dan, Alexa)

We first centered the beam on SR2 by adjusting SR3. We looked into HAM4 using the analog camera and we centered the beam around the aperature in front of SR2:

(SR3 original position: P 500 Y -150)

BOTTOM: P 513 Y -100

TOP: P 428 Y -100

RIGHT: P 464 Y -138

LEFT: P 464 Y -98

FINAL SR3: P 464 Y -118

Next, we adjusted SR2 to center the beam onto SRM/FI via the analog camera looking into HAM5:

BOTTOM: P 4154 Y 1770

TOP: P 599 Y 1770

LEFT: P 2376 Y 3420

RIGHT: P 2376 Y -100

FINAL SR2: P 2376, Y 1660

To fine tune SR2, we examined the beam in HAM6 and found the positions when the beam disppeared:

Dark  in pitch:

P 2546, Y 1660

P 2006, Y 1660

Dark in Yaw:

P 2276, Y 2061

P 2276, Y 1482

FINAL SR2: P 2276, Y 1771

In this configuration we measured the power in HAM6 to be 2.6mW with ~1600mW at the PSL periscope PD.

[Dave Arnaud]

Since the test stand for testing the 3rd IFO quads will be needed soon, we took a look at the h1susquadtst model, and succeded a 'make' after making some modifications to the model : 

1. grounded two tests inputs/outputs of the quad common part (wouldn't compile with unwired inputs)
2. grounded the DACKILL_STAT_OUT bit which enables ISI watchdogs (no ISI wired up, so no need for it)
3. Modified the Binary Input/Output parts (copied from itmy) with the new CBI-CB0 parts + hwwd (wouldn't compile with the old parts)

When the test stand will be wired up / turned on, h1susquadtst model will simply need a make install (follow instructions here)

New model was commited to the svn under revision 8555

Work on the PSL FSS and locking the IMC for HAM6 work
Journal club talk by Prof. Paik

08:26 Ed updating AI chassis in H2 building
08:32 Filiberto to end Y to look at ESD power supplies
08:33 Tim to end X for B&K hammer measurements
08:53 Jason starting work on SR3 optical lever
08:58 Nathan starting unattended work in the optics lab
09:05 Karen to mid Y to clean
09:13 Jeff K. to end X with Tim to work on B&K hammer measurements
09:44 Kyle to end X to work on vacuum equipment
09:44 Manny checking for property tags at the end stations
09:45 Richard and Filiberto to end Y to work on ESD
10:47 Travis to test stand area to retrieve parts for the staging building
10:47 Richard and Filiberto back from end Y
11:00 Keita done transitioning the LVEA to laser HAZARD
12:08 Karen back from mid Y
12:13 Richard to end Y to reinstall Comtrol box
12:14 Robert and Paul to Y beam tube enclosure
12:35 Richard back from end Y
13:25 Jeff K. and Tim to end X
13:55 Kyle to end Y
15:04 Kyle back from end Y
15:50 Nathan done unattended work in the optics lab

(Entry by Kyle) 

John, Kyle, Daniel

Today we finished roughing and transferred to the turbos (YBM, XBM, Vertex) -> I valved-out and spun down the Vertex turbo @ 1530 hrs. local -> Currently, the turbos are being backed by the QDP80 roots pumps -> Tomorrow, I'll switch to backing with the nominal small scroll pumps (these had been loaned to the Y-end for Rai's ionization apparatus)

(John W, Daniel S, Keita K)

The viewport on the HAM5/6 septum was rotated by 120 degree clockwise. Torqued to 16 lbs.foot as per the spec. We didn't have to use a new O-ring as the old one was intact.