Betsy, Jeff and I did a measurement of the maximum obtainable pitch and yaw range on the rebuilt Quad #2 using an optical lever. According to Norna's write up, T1000268-v1 ( https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=11868 ) we should be able to get 1.4 mrad in each direction at the optic. At the DOF Test screen we applied successively offsets of +2556 and -2556 in pitch and +7863 and -7863 in yaw, which with the usual output matrix maxes out (32K) at least one of the OSEMs. The resulting deflections of the optical lever spot were +9.5 and -11.5 cm in vertical (+=down) and +5.5 and -6.5 cm in yaw (+=left). The optical lever baseline was 4.98 m. 

This implies a total range of 1 mrad in pitch and 0.5 mrad in yaw, which is rather less than expected. A big chunk of this is that the actual UK driver boxes for the test stand were not built to the 200 mA max output assumed in T1000268. To check this, the voltage across the face1 coil was measured at the simulated vacuum flange, with 32K-1 of offset applied at the Output Filters screen. The resistance (including that of the cables) was 39.9 ohms and the voltage was 3.69 V implying a maximum current of 92.5 mA.

The fact that the pitch range is larger than the yaw is probably connected with the fact that the fundamental pitch mode frequency is rather lower than in the model, i.e., there is more pitch compliance than expected.

0820 - Diamond Freight arrives
0925 - Corey out to MY to stage Wed. work
0925 - UniFirst arrives
0928 - CP7 Alarms...everything OK.
0943 - Ace here to clean portable toilets
1030 - Gerardo goes out to LVEA to make some measurements by the spool for the cryopump
1045 - PraxAir arrives.
1051 - 110B Sensor Alarms from ETMX and ETMY due to Richard's CDS work.
1055 - Squeezer laser is on

Richard also fixed the outdoor flood light by the Control Room door.

Reminders:
- NO WORK AT OUT-BUILDINGS UNTIL MANAGEMENT SAYS OTHERWISE.
- Jodi is off-site.
- HAM12 doors still off

(Y-end)  I noticed early in the afternoon that the dewar pressure following the delivery to Y-end (CP7) this morning was way too high, i.e. 42 psi (nominal is 15 psi).  The driver may have neglected to open the manual relief valve to allow for the displaced vapor to be relieved as the liquid column was rising while filling -> I had to travel partially offroad to get to the Y-end station (wind gusts were causing a rapid accumulation of tumbleweeds) in order to manually open a pressure relief valve in order to correct.  CP7 overfilled as a result of the change in relationship between %open of the control valve and resulting liquid flow.  

Operator: expect CP7 alarms over the next 24 hours.


(X-mid)  The wind gusts increased significantly during the ~60 minutes that the X-mid (CP5) tank was being filled.  The rapid buildup of tumbleweeds along the X-arm effectively prevented the Praxair truck driver from being able to leave!  Luckily I was able to solicit the help of Hugh, Corey, Mitchell, Chris, Joe, Zack, Rodney and Ski who helped clear a path using pitchforks and walking in front of the truck the entire distance from the X-mid to the Corner Station!!!  

(Corey, Hugh, Mitchell, Rodney, Zach)

Today, we did the following:
* Top of the cleanroom was cleaned (it was not very dirty, since everything on top was newly-installed)
* Old Cleanroom roof/sock was removed
* Top of the BSC6 Dome was wiped down
* Big BSC6 cleanroom roof/sock was installed
* Made a fit check of the spreader bar on the BSC Dome lifting eyes.

To get access to the top of the cleanroom/BSC Dome, Mitch was attached to the crane via fall-arrest rigging.  To get to the top of the cleanroom, we needed to bring out the blue manlift.

Waiting for powers that be to sign-off on the BSC De-install Hazard Analysis/Procedure, and then we can proceed (as long as tumbleweeds don't prevent access to MY).

Disconnected PT210A, PT210B gage cables and BSC6 annulus pump power and signal cabling to facilitate BSC6 dome removal.  

Pressure indications from PT210 gauges are bogus until further notice.  

Doors remain off HAM12 and covers on, but no work occurred there today.
There's a work permit about moving a clean room at MY, which presumably happened.

10:10 Recycling pickup

1:15 south door of HAM 12 cloth removed, north door cover removed shortly after
~4:55 both doors of HAM 12 cloth covered
Scrubbing HAM 12 from 3:56 - 4:13, attached is trend of dust levels in the LVEA during this time
Location 1: Inside ISCT4
Location 2: Outside South West corner of clean room
Location 3: Inside North East corner of clean room
Location 4: Inside South East corner of clean room
Location 5: Inside "beer garden"
Location 7: Between HAM7 and HAM8
Location 8: Between HAM1 and HAM2
Location 10: Inside H1 PSL

~10:30 - Cleaning by ham7 

~11:00 - Ground Water in to sample water well

~2:30 – Both doors off HAM12

~3:00 – crew out to test new “scrubber” for in-vacuum cleaning.  Work continues by 4:00pm.

Kyle, Ski, Joe, Chris -> Removed HAM12 North and South doors.  This is the 1st time these doors have been removed since being baked out.  O-rings completely stuck like "glue" for entire contact area.  Much viton material "donated" from O-rings to compressing flange.

Jonathan, Patrick, Dave.

On Tue 7th we ported the advance ligo wiki service from the old iligo wiki machine (called wiki on the 10.2 network behind the ruby NAT router) to a new GC machine dedicated to the advligo wiki. The new machine is a centos linux, using ligo.org authentication. The new machine uses the lastest moinmoin version, whereas the old wiki had a very old copy of moinmoin.

The move required:
Copying the data content (2.9GB of files) and porting from old to new wiki format.
Transposing authors from the local accounts to the ligo.org equivalents
Automatically redirecting access to the old advligo URL to the new URL

The new wiki is at https://awiki.ligo-wa.caltech.edu

Questions, Comments, Problems should be emailed to wiki-help@ligo-wa.caltech.edu

- Zach, Rodney, Cheryl

Removed plumbing, including all copper pipe and hoses, between the H2 TCS tables and the chiller closets.  Tables are only tethered by the card access system, since H1 and H2 TCS enclosures are tied together to one card-swipe box.

HAM7 was closed up and the clean room moved over to cover HAM12 in preparation for tomorrow's dirty work.
NSF tours were taken through the LVEA.
Cheryl dismantled some of the TCS plumbing, leading to some minor leaks of propylene glycol, which were cleaned up.

The Corner Station purge air compressor (Kobelco) has had a "Service Alert" ever since the power glitch a few days ago. The PLC memory battery failed and the various service parameters have defaulted to initial (not applicable) values.  Operationally, the purge air is fine. 

Kyle, Corey, Joe, Chris -> Hung West and East doors on HAM7

Annual site septic field inspection.
Drain field was rotated

X-mid door installed not complete

Major work:
- NSF Review Begins...Tour scheduled for 1330
- HAM7 passive stack extraction
- aLIGO Wiki upgraded
- Door on HAM7 still off
- Praxair Delivery
- Closing HAM7 and craning clean-room from HAM7 to HAM12 not completed at time of writing

Times in PST:
0835 - Overhead doors arrive at MX
0847 - Corey out to HAM7 with Cheryl, Jeff, Rodney, Ski, to move MMT3
0905 - Squeezer on
0934 - Les Schwab arrives with tires
1131 - EX CP8 alarms, due to fueling by Praxair
1134 - Corey confirms that HAM7 is done
1331 - Jodi begins testing rotary tool at MX...disappointing results

[9:45 -11:15am]
(Corey, Jeff, Rodney, Ski, Zach)  

After helping out with moving SOS's around, the HAM7 stack removal commenced.  The procedure went smoothly.  The hardware is piled on top/next to the HAM8/9 hardware.  This pile of hardware will be moved out of the LVEA as soon as we receive recycling bins.

The old advligo wiki was transitioned to read-only mode at 8am. Its data content is being transferred to the new awiki server (latest moinmoin with ligo.org authentication). We hope to have the new server ready for use by end of business.

Dave, Patrick, Jonathan H.

Today's major activities:


 HAM7 optics removal (complete)
 HAM7 prep for SEI stack removal.
 Some on site deliveries.
 The other usual miscellaneous stuff.


Also note that there are occasional high temp alarms for LVEA Zone 4F due to the increase in equipment added by the squeezer group.  These are OK (unless the temperature continues to rise, or other zones also go into alarm, obviously).