We spent time yesterday afternoon working on tooling (planing veins, stoning barrels, etc.) with John's help. We re-worked all six drills and felt ready to start Wednesday with some chance for success.

Wednesday started with the usual checks, blow-outs, etc. Mark Layne and Zack were in-chamber, Mick was outside, and Carolyn was recorder. We started with "5 of 6" and cleaned 15 sections today, bringing the total sections cleaned to 33 or 37.5 %(BSC = 88 sections). "5 of 6" now has a cumulative run time of 4+ hours. Drill 6 was tried  but only ran for 3 minutes. Mark and Zack moved the compressor trailer out of the LEA in preparation for the BSC ISI tomorrow morning. 

Twelve new drills arrived today. Mark and Mick will start cleaning them tomorrow using the newly written procedure as a guide.

It's redundant to have a user's comment to another user's entry show up both at the top of the "news feed" and be attached to the original entry. Further, a useful model of the old eLOG was to add subentries with related but less important information. So I suggest one or both of the following:

- If the desire is still to have the comment pull to the top of the "news feed," bring the whole main entry back up to the top of the feed, with the new comment attached.
- Or, have the "comment" button create a "sub-entry" that doesn't pop up at the top of the "news feed," but merely attaches to the main entry.

Either way, the comment / sub-entry should stay attached to the main entry, and that's the only place it should show up.

(For an example, I had intended entry 967 to be a subentry to 966)

Often times I would come to a work station, attempt to write an aLOG entry, and find that the web browser has someone else's ligo.org credentials in place (either from recent use or a stored kinit), and I have to close and restart the browser before continuing, or run kdestroy. One should have the ability to log out, or at least have a "Not You?" link that takes you to the home screen, clears the store credentials, and asks for new ones.

The clean air purge on BSC 4 needed to be relocated to allow HAM 10's iLIGO crossbeams to be removed. The valve needed to be moved from the flange on HAM 10 to the flange on HAM 9. The blank and the valve swapped places. Unfortunately the clean air purge on BSC 4 needed to be rotated to accommodate this. The conflat was replaced with a new one, and the flange has been flagged with a note that it needs a leak check. 

BSC 4 purge air valve needs a leak check!

Scott and Ed meanwhile worked on removing the old stacks and jacking the support tubes. So the new HEPI piers will be able to be set tomorrow while the leveling of HAM 9 finishes.

Further prep work today at the HAM5 north door for squeezer modifications to HAM4 beam path.
HAM HEPI assembly.
BSC7's turn at chamber cleaning nonsense.
Staging and prep work for transmon assembly at the EY lab.
The usual Tuesday vendors (Unifirst, Praxair, Paradise Water).

Here is a comparison image of the new Accumulator Wet side made in Stainless Steel.  They look very nice.  Although the shop test fit 100% (they've done 25 of 160) EricA is putting together the first ones now and we'll confirm they are sealing well with N[SIZE=1]2[/SIZE].  We will install these new ones on the remaining three H2 Pumpstations on the mezzanine, the H2 Pump Station at the end station and reserve eight for BSCs 8 & 6 distribution manifolds.

Yesterday
Spent time on tool autopsies, re-cleans, and re-assemblies. We did not find egregious hydrocarbons in any of the usual nooks and crannies. All six drills were reassembled, deemed ready for use since they all spun when turned by hand.

Today
Morning check-out of hoses, compressors, tanks, etc. Ran spin checks on all six drills prior to going into chamber. Four out of six drills appeared to work at the time (1, 3, 4, 5). However, when put under load in-chamber all but one failed to function. Apparently, drill 5 (also known as "5 of 6") comes from some foreign planet that allows it to run regardless of the severe abuse heaped upon it by the demands of aLIGO chamber cleaning. We will spend the afternoon working on tooling again. (We'll see whether we can figure out what characteristic "5 of 6" has that the other drills do not and we will play with the surgical drill.)We cleaned two sections today and determined that a "pouffy" brush works pretty well on chamber walls (gives a more uniform finish) and the LLO-designed chuck replacement and small cup brush combo works well close to the fins. We brushed two sections today, bringing the total sections cleaned in BSC-7 to 18 of 72 or 25% of the chamber.

A reviewed version of the handbook for the 200 W laser, which is going to be installed in October, can now be found at the DCC:
LIGO-T0900641-v4 (https://dcc.ligo.org/DocDB/0008/T0900641/004/Operating%20Manual%20AdL%20HPO.pdf)

You are welcome to send me your comments, if you have some...

Michael Rodruck, Jose Puente

Finished installing the acoustic panels in the PSL acoustic enclosure. Very quiet in there now.

The dust monitor at location 3 has a sensor fail and may need to be replaced.

Recovery from power outage on Sunday

Scheduled:
Work platform for cartridge install, fit check assembly around BSC 4
Cleaning of the LVEA ISI test stand area
Grouting for optical lever test

Both the crossbeams for HAM 9 have been installed despite the fights for crane time. With the aid of Ed and Scott we were able to pass the crossbeam under the beam tube first by picking with a cradle lift from the center of the tube, then setting the crossbeam down on stands and re-picking with the spreader bar. For some reason the HEPI foot took even more adjustment to bring into alignment than usual. The North end frames are a little south of an optimal Position (a few 32nds of an inch).

Remaining is to install the clamps on the frame and torque the south end to spec. Afterwards the clamps will be torqued around the support tube and hopefully the support tubes can be shot and brought into nominal position.

Cleared error on Corner Station purge air compressor - OK now.

LHO had a power outage (not sure at the moment if it was just the corner station or site wide). Outage was 20 seconds long, from 08:10:52 to 08:11:12. All front end systems (H1 and H2) are down. H1 and H2 DAQs are down down, H1 PSL screens are white. old ilog, web login services are down. Rebooting and restoring systems now.

We really need more section headings.  "IFO and SubSystems" is everything.  We could start with one heading for each major IFO subsystem, as well as a few for common activities (calibration, glitch investigation, data analysis, SciMon, automatic or robo entries, ...).  These should all have different heading colors to aid the eye when scanning for interesting entries.

Matt, Lisa

We spent the afternoon assembling the green QPD sled in the new EY lab.  Our reference design comes from G1100129.

The first picture is of the EY clean lab, in its current disorganized state.  For the record, the particle counter reads 0 except when we are near it, in which case it may reach ~50 particles/CF.

The second picture shows the input green laser (~2mW of green, collimated at w ~ 2mm), arranged to send a beam across the class A sled to the beam scan.  The 2" converging lens (L1, ROC = 154.5mm), the 50/50 beam-splitter, and the first 1" diverging lens (L2, ROC = -25mm) are in place, but the first HR mirror is absent to allow the beam to exit onto the beam scan.

The third picture is of the same setup.  Yes, the laser is on.  Yes, it is visible light.  No, you can't see it on any of the clean optics, or in the air.  Only the dirty fiber collimator shows some light.

While in this configuration, we adjusted the position of L2 until we got something we liked (based on quick beam scanning), and then we took some beam scan data.  In the last 2 columns, I've divided the 36.8% data by sqrt(2) to convert it to beam waist radius, and then taken the mean of these data with the 60.7% data.

The last picture is of the final assembly, with all mirrors, lenses and QPDs in place.  The black glass beam dumps are AWAL.

The simulink library part for the QUADs (used to produce the guts of every QUAD model) was generated from a version of my original model, before I knew that the LED light level voltages were *not* being stored in the DAQ, so today I went in and removed them from the guts of QUAD_MASTER model. Because I had them come in at the top level (as though from an ADC), I needed to then also modify the connections at the top most level of each of the suspension's models that have been built. Further, I had used the LED light level as a term that was watched by the watchdog, so removing them from that meant not only a reworking of the MASTER simulink model, but the generic MEDM screens, *and* the QUAD.c auxiliary watchdog front end code. All effected files have had there functionality re-confirmed, and have subsequently been committed to the cds_users_apps repository in the
${userappshome}/cds_user_apps/trunk/sus/
section (where ${userappshome} for H2 is /opt/rtcds/lho/h2/)

During the process, I had Dave create the same soft-linked "release" folder in the 
/opt/rtcds/lho/h2/core/
directory, which links to whichever RCG release one is *supposed* to be using (which for the time being is the 2.3 branch, not a tag). That way, when we upgrade to any future generations of the RCG, the sysadmin merely updates the softlink, but to the average user, the build directory remains the same.

Further, though ITMX doesn't exist yet, when I recompiled and installed the ITMX model that Rolf and Dave had built on the h2susb478 machine, I generated the OVERVIEW screen for it as well, as linked from the sitemap (which is delightfully easy once you've built a generic screen).

Also, while messing with the models, I tried exploring how to use the cdsFiltCtrl CDS simulink part, run into a bunch of trouble with internal links and library parts, and also learned how generic MEDM screens are in use. Sadly very little science was done, and I'm still confused the blocks are supposed to be used, but at least there's now one more person on the planet that has any clue as to how we're doing things with the newest suite of CDS software (library simulink parts, generic medm screens, RCG 2.3, etc).

9:00- 10:00 moving of squeezer table. Clean room by hams 2 & 3 was moved a few feet from its original position.

9:40 – Michael R. and student working on the H2 PSL to install the acoustic panels.

10:30 - Rick and Gregorio at Mid-X

12-12:30 tour into the control room.

throughout the day: 
quad test stand work in the LVEA


HAM 5 door removal ongoing 

R. Lane, R. McCarthy, B. Bland, T. Sadecki

We attached the BOSEMS for the ITMY to the vacuum feed-through simulator. It took a bit more setup to get the signals on the right channels in the hardware. When we finally saw them we were confused by the fact that we are used to seeing them in the range of 0 to -32000 counts, but we were seeing them railed at +32000. After some debugging by Richard we determined that the hardware seemed to be working. We tried blocking the light in the OSEM, and the signal went to zero. Our conclusion is that the hardware is working in general, and we are getting real signals, although quite large. On the next working day we have plans to compare the control signals in the X1 test stand versus the H2. Richard has a theory that the LED is being driven harder in the H2 hardware (~30mA vs 10mA).

• Chamber cleaning in BSC7
• Squeezer racks moved into position
• Septum window from HAM6 installed in HAM4 for squeezers - table will be moved into place tomorrow
• Patrick moved dust monitor from MY to MX
• Powercycled and restarted H2adcumy
• Pcal box removed at MX