Mark B.

Set MC3 to undamped at 08:55 for a 20 minute spectrum series. (We already have a nice damped interval from last night).

EricA & Hugh
The welder finished the tubing runs Tuesday and yesterday we did a couple of the last things required.
First the Actuator Flex hoses were attached to the 4-way valves.  These valves are in recirculate mode.  This position isolates the Actuator/Hose from the housing supply/return plumbing.  The Actuator & hose have fluid in them; the housing tubing remains dry.  The 4-way valve is very stiff and takes a good effort to turn so it is unlikely they will be inadvertently moved.  Please don't do so purposely; we must flush the main lines before opening the valves.
Second we started the install of the electronics modules.  These reside out in front of the pier; please be mindful of these components.

[Luke, Paul, Giacomo]

In the late afternoon we moved the faraday isolator from the PSL enclosure to the HAM2 ISI. We used the cookie cutter place it, so it is already positioned properly. It is not clamped down though, as we don't have the right type of clamps. So, we left the cookie cutter on the table.

We also put in the periscope cookie cutter. The periscope does not have the optics and the black glass in it yet, but we temporarily place it on the ISI table to remove it from the chamberside cleanroom. It is clamped with two temporary clamps.

We couldn't place the cookie cutters for the HAUXes because of a number of issues (for which we should already have a solution), so we just positioned them such that the are (hopefully) out of the way for MC3 installation (but they can be moved easily).

Attached are a couple of pictures of the growing HAM2 population...

PAC meeting
Rick, Cheryl, installation of light pump, alignment of optics between laser enclosure and HAM1.
Sensor failure for dust monitor in Bake Oven Room.
Hugo reported DAC channels not writing correctly for h1seih23, frontend rebooted.
HAM2 viewport installation
Filiberto dressing cables in cable trays around HAM3
Operator station alarm handler moved to H1

Two visible earthquakes on seismic plots:
5.1	54km SW of Champerico, Guatemala	2012-11-07 22:42:48 UTC	13.907°N	92.225°W	35.1 km
7.4	24km S of Champerico, Guatemala	        2012-11-07 16:35:50 UTC	14.083°N	91.916°W	41.6 km

LukeW and RickS

We started the installation of the beam pipe and shutter/beam dump housing designed by Joe Gleason at UF.

There is a slight alignment issue that appears to be partly due to an error in the clocking of the housing where it mounts to the (double window) viewport adapter.

The housing was intended to mount vertically, but is off by one half hole spacing on the 24-hole bolt pattern of the 10" conflat - 7.5 deg.

Tomorrow, if time allows, we may slot or re-drill the flange of the housing so that it mounts vertically (as intended) and relieves some of the misalignment with respect to the opening in the Laser Area Enclosure (LAE).

For now, the lock and tag for the plug that blocks the opening in the LAE has been moved to inside end of the tube, i.e. inside the Laser Room.

The IO work on the Faraday Isolator on the PSL/IO table is finished, so today I started the transition to low-power mode.

The high-power oscillator was shut down (to conserve pump diode lifetime).

The PMC modematching lenses have not been moved yet and the alignment into the PMC has not been adjusted.

For now, the front-end internal and external (manual, mechanical) shutters have been closed for installation of the beam tube between the Laser Area Enclosure and the HAM1 chamber.

Tomorrow, we plan to complete the transition to low-power mode.

I've enabled the damping on MC3 at 4:45pm, so we should be able to get spectra for past this time.

While the Main chain damps, we can't engage the reaction chain damping.  We've carefully poured over settings to see if there is a sign, filter, or gain setting incorrect but all looks well.  Example Symptom: When engaging Transverse (only uses SIDE BOSEM), we see no ring up or down.  When flipping the sign on the damping we see a large ring up.  This indicates the SIDE magnet polarity is correct.  More forensics tomorrow morning, but I'm hoping to solicit Richard to help me see actuation out on the floor...

I've also re-checked that there is no rubbing on this chain, and that it appears to be floating freely when pushed.

Disconnected SUS SEI field cabling from HAM3 feedthrus to dress cabling inside cable trays around HAM3. All electronics were powered off before cables were disconnected. When reconnecting cables, had Corner 1 and 2 for ISI driver (Coarse and Fine) connected backwards. Hugo is trying to bring HAM3 ISI back up.

[Giacomo, Paul]

We installed the parking beam viewport baffle in HAM 2 this afternoon. The installation went smoothly; it was easy to access the viewport standoffs by sitting on the table with our feet on the HAM1 side nozzle. Just in case, we had put a C3 sheet over most of the the table to protect against dropped screws. I attached some images of the installation process. 

We did however notice a slight issue with the standoff posts. The posts have to be screwed into the viewport reducer by hand, and since they are cylindrical it is not easy to torque them very much. The silver coated screws that screw the baffle assembly to the standoffs are quite tight within the standoff thread though. Since the baffle assembly should be adjusted in rotation to pass the beam through the aperture, one may be required to unscrew these screws. Unless a pair of pliers or similar is used to hold the standoff in place, attempting to unscrew the screw that fixes the baffle assembly to the standoffs will instead unscrew the standoffs from the viewport reducer. This should be kept in mind for anyone adjusting the baffle rotation, and potentially for LLO / India installation too. It was suggested to look into a small redesign of the standoffs to fix this issue.

(Jim, Chris, Giacomo, Douglas, Gerardo)

We installed the REFL parking beam viewport, first the aLIGO IO reducer was installed, part number D1201195 on port D8 of HAM02, on top of the reducer a viewport was installed, assembly D1101670, the following just for posterity, we used 5/16-24 x 1.5", 12 point, silver plated bolts to hold the assembly to the reducer.

The viewport is now covered with a viewport protector and a safety cover (yellow type).

Leak check needs to be performed on this viewport.

It seems that the ISI foton files have been moved to the userapps directory, and the old location is now a softlink to the new location. e.g.
/opt/rtcds/lho/h1/chans/H1ISIITMY.txt is a softlink to 
/opt/rtcds/userapps/release/isi/h1/filterfiles/H1ISIITMY.txt

(see https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=4093 for more info about this change, real documentation will be forthcoming.)

To support this file move, I have updated the SEI tool get_filenames.m so that it will follow a softlink for the foton file location. It will not work on a windows machine, and will only follow the link one step, but it should work, once the {SeismicSVN}/Seismic/Common/MatlabTools/ directory is svn up ed.

See the SEI log for some more info: https://alog.ligo-la.caltech.edu/SEI/index.php?callRep=126

SEI diagrams are built such that SUS watchdogs trip SEI watchdogs. During testing, the QUAD can be installed on one teststand while the ISI is installed on a second teststand. The connection between SUS and ISI is not necessary in this case. For convenience (no need to modify/recompile the model after every change), I added in the diagram of h1isitst.mdl a switch that disables the ISI-SUS watchdogs connection.
By default (variable at 0, case after recompiling a model without any burt restore), the ISI will read the SUS watchdog. If the variable H2:ISI-TST_SUS_WATCHDOG_DISABLE is set to one, the state of the SUS watchdog is ignored.

I'm updating the M2 and M3 stage AOSEM offsets/gains for MC3 now that they are on the IFO electronics.

As noted in earlier logs, there was a small V-P coupling seen in MC3 TFs posted by Mark here.  This morning, I made an adjustment to the top T1 BOSEM as the flag was much closer to the LED than the PD (or vice versa since they look the same, but at least this is descriptive of the axis of the misalignment).  Mark is remeasuring the undamped TFs but the small V peak in R looks even smaller.

Picking up where we left off before rotating the CP last week, I resumed ITMy alignment/damping work.  Since the user model was transitioned by Dave during yesterdays switching of machines from H2 to H1, and the safe.snap was out of date, I had to manually restore the values/signs determined by Kissel/Sadecki Oct 30 in alog 4549.  I've confirmed that the main chain damping appears to work (no noticeable wobble of the speed dials) and Dave updated (and committed to svn) a new h1quadtst_safe.snap located at

0$ /opt/rtcds/userapps/release/sus/h1/burtfiles/quadtst/h1quadtst_safe.snap
 

The reaction chains spins out of control when the damping is enabled, so clearly we still have a sign wrong somewhere there...