The air-bake oven in the LSB optics lab has had a new controller installed. The controller is capable of handling ramp and soak functions. Large changes to the oven (opening or closing the flue, etc.) will now need the autotune process after the change has been made if an accurate temperature ramping is desired. More info can be found here: Omega Manual. The controller can run a program with 30 setpoints to ramp and soak at different rates and hold times.

Attached is a graph of a ramp up from 40 to 70 degrees in 30 minutes that was run as a test. I will attach a more detailed report to this when it is finished, but if anyone would like to use that oven I will be more than happy to give a run down on how to set it up. This controller really suffers from a Blinking 12 problem.

Also attached is the modified wiring schematic that represents what is now in use for the oven. As you can see the controller will stay on even with the power switch off. This is how I intended it to be, the fan and heater will be de-energized by the switch still.

With most of the cabling completed we got the Dial Indicators in place and followed that with suspending the HEPI from the double start counter wound Springs.  Of course that means everything is floating--SEI Crossbeams (external blue), Support Tubes (in-vacuum), SEI-ISI & Suspensions.

***  Do not disturb the Blue Crossbeams  ***  Ah heck--DON"T TOUCH ANYTHING, please!


EricA, MitchellR, RichM & Hugh

The first phase of network switch changes is complete for the coming migration of the iLIGO legacy systems to aLIGO.  Note that there will be short data gaps (1-2 min) from this afternoon in the VE and FMCS data when the connections between switches were moved.

A soluation may be either checkboxes for relevant interferometers (as was done in the iLog), or list all the subsystems under the "Task" menu when the LHO "Section" is chosen.

This would be useful for classifying tasks such as:

- A subsystem purchases a tool, e.g. romer arm pr camera, for use throughout a site.

- Pcal calibrates a power meter that will be used for all interferometers.

- A seismic event happens that affects all interferometers.

- IAS working in BSC8, installing corner cube
- Richard and SEI pulling cables
- SLC hoping for Wednesday installation
- Kyle looking for missing ConFlat flanges
- H1 PSL contractor coming Tuesday to lay down linoleum
- HAM1,2,3 - removing optics from HAM3
- Hanford Fire Department on site for testing

See LLO aLOG 2140 for details, but please svn up any local copies of the SusSVN, specifically the ${SusSVN}/sus/trunk/BSFM/ corner of the tree.

The RH installed on the quad for BSC6 had an encounter with the fiber pulling laser, and has a couple burn spots.  I checked the resistance of the RH cabling at connector J9 today, and all wires check out OK, except the RTDs which we knew were broken.

Table of resistances is attached.

The communication to the dust monitors was lost for an extended period yesterday (Thursday Dec. 15, 2011) due to an accidental cutting of a network fiber to the LVEA.

The dust monitor at location 3 in the LVEA was moved into the clean room over BSC8 last night to replace the one previously there. It now has location 15 in the LVEA.

Attached are plots of dust counts > .5 microns.

(Corey, Mark, Randy, Zach)

With yesterday being devoted to clearing out an already-congested LVEA South Bay (& releasing load on Scissors Table Spring Cups), we started bright and early today on extracting iLIGO hardware from HAM1 [this was all done with only the West door off].

The MMT3 was slid out via the teflon highway, and we slid it onto a mini-surfboard mounted on the forklift.  (This SUS Assembly is now in the Optics Lab)

After this, we removed everything above the Support Table for this Seismic Isolation Stack (i.e. Optics Table, Masses, Springs, etc.).  Minus the Springs, we were asked to wrap & bag all the hardware (this generally doubles the time of the work).  The Optics Tables and Masses are currently wrapped and bagged and in the area near the racks. 

Notes:

• Did not remove cabling in the Chamber (since I didn't have a clean wrench).
• West Door reinstalled; another Apollo team loosened bolts on the MC Tube flange adjacent to HAM1 as we were finishing up; the East door has many bolts removed.
• Photos from work are located here.
• Spring Cups have been relieved on HAM3 & possibly HAM4 (thanks to Greg & Scotty)

Attached is a photo of the feed thru protection on a flange of BSC8.  We mainly wanted to protect the Triax connectors for the CPS (capacitive position sensor) but of course added them to all the conflats with actual conductors.

Ready for Cable Tray and Cabling.

After setting the Actuators to bleed mode we (Eric & I) powered down the Pump Stations, took fluid samples to look for gross things, restarted just a single pump and set the servo to low pressure (80psi down to 15PSI).  Then one by one, opened the valves to the actuators while watching the pressure changes.  Servo worked as expected throttling back the pump as the pressure increased going to the Actuators.  We monitored for leaks real time and found nothing.  After half the valves were opened, we upped the pressure to 30psi and checked for leaks again.  Still all good.  We final opened up the remaining four valves checking for leaks as we went.

So far all's well--no leaks, servo functioning.

We (Greg, Scott, Mark) cranked up the HAM2 Scissors Tables and got the Support Tubes on the Support Blocks in the Chamber Nozzles.  The Crossbeam is loose at the top of the external support stack (CAS) so in theory, all the external stuff could be removed.

We also pulled the glass baffle between HAMs 2 & 3 out as well as the metal baffle South of HAM2 at the Mode Cleaner Tube port.

The logbook is going down in 4 minutes for maintenance.

No Tee for purge line -> purging BSC10 volume, BSC6 in cleanroom

Removed FirstContact from EMTy HR, as it was too thin and tore when pulled down for IAS purposes.  Also, there were 6 splatters of FC towards the edge of the optic which needed to be "picked up" with the new sheet that I applied.  Particulate was observed on the surface of the ETMy, but no discoloring.  Attached are pix of the as-received thin FC sheet.

More images to follow (we'll get an entry at ResourceSpace), but for now, some images from Betsy and myself of the Friday cartridge work.