Here are the pictures of H2 ETMX earthquake (EQ) stops before any work was done on the optic.  It shows that only two of the 8 stops have chipping where the EQ stops contacted the chamfer of the optic (though one picture is blurred, so no clear info there).  This info might be useful when looking at the optic now, because I created some chipping when raising the optic to remove the suspension wire.  As I recall, the SW Upper EQ stop site suffered the most chipping.

The site experienced a 1 second power glitch at roughly 1am early Sat morning. The UPS system in the MSR reported switching to battery backup for 1 second at 0:59.
The ilogo wiki machine required several reboots to restart it. It was moved to UPS power since this machine is showing reboot problems.
The H1 PSL needed restarting, more details in the ops summary.
Other items which needed restarting: weather stations, dust monitors. May be more as we discover them.
aligo CDS is fully UPS'ed and was not affected.

	Dave, Cyrus and Jim.


	We rebuilt the H2 server rack in the MSR. We adhered to the
	LHO CDS Computer Rack Standards


	All the first article 1U servers were upgraded to 2U machines, which allows for cleaner cable and power routing. They also provide network management capabilities.


	Three machines did not upgrade to the new hardware on the first try and were downgraded to their original computers for the weekend. We will work with Jonathan on upgrading these Monday. These are all administration machines and are not visible to the H2 users.

GV 5 and 7 soft closed to crane forklift across beam tube.
HAM 3 east door removed in preparation for unlocking the H1 recycling mirror on Monday.
Suspension in place for removing the mid Y spool on Monday.
H2 CDS rack rebuilt with new 2 unit computers.

Kyle, Nicole, Randy, Scott, others

Penetrations into the LVEA for duct work and condensate lines were caulked and sealed. Bob Rhodes will be onsite next week to tape duct joints and provide protection for outdoor condensate lines

(Corey, Doug, Jeff, Jim, Mitch)

HAMISI#3 Prep For Removal

Surgically removed all the cabling from the ISI (Actuator, & GS13 cables).  Installed the final Walls on the assembly.  This ISI is now ready for removal (just need to clean up the Storage Container).  Bagged up the extracted GS13's as well.

BSCISI#1 Work:  Optics Table Flipping & Top Plate Of Optics Table

Finally put the Optics Table Flipper hardware to use.  Unfortunately, there were some CG issues because the part hung quite a bit askew.  So, a wee bit of manhandling was needed for the flip.  The Optics Table was eventually flipped and we took a first round of checking/removing broken helicoil tangs. 

The top-facing Optics Table was then brought into the cleanroom and was laid down on top of the Optics Table.  At this point, Jim & Doug did some dowel pin hole reaming (basically two holes were missed by the machine shops). 

Photos:  include work from today and a big ole pile of broken tangs!

The ITM Quad 2 is on the test stand has been optically aligned. The BOSEMs are installed and tuned as per E1000494. The Quad is now ready for testing. 

(Corey, Jim)

Other than Mitch's never-ending background work of keeping us organized and handling tons of our parts, there was no BSC ISI Assembly work today (waiting for Optics Table Flipper hardware). 

HAMISI#3 Removal Work

Re-payloaded the ISI, Balanced, and then Locked.  At this point lots of grunt work occurred to get the ISI staged for removal:  Shipping Brackets installed, most Walls removed for GS13 access, all (6) GS13's removed, masses removed from Optics Table, and Walls were re-installed. 

Attached are photos of the weights on the Optics Table to balance it and the Shipping Brackets getting helicoiled.

Highlights (PST):
08:50 - Mid Columbia Forklift arrives 
09:34 - Locksmith arrives to work on doors in outbuildings
10:10 - DaniA leads laser safety tour of LVEA
11:00 - Ski begins refurbishing locks at all outbuildings...alarms expected
13:45 - Kyle vents vertex.  He also turned off "ASC-HV."
14:39 - Monarch Metal arrives for Ski, delivered to warehouse
15:00 - Will Scott arrives for Richard
15:30 - Delivery from Mid Columbia Engineering to LVEA high bay
Morning drop-in and 16:00 tours today.
Dust Report (attached): #3 and #4 are ~flat-line.  Big spike at ~14:00-15:00 PST.
Intersection of WA-240 + Rt. 10: Jack-knifed tractor-trailer.

The HEPI Frames have been installed on BSC 4.

Dumped GV3 annulus into aux. turbo cart

Vented Vertex and HAM6

Air conditioner units are powered and are running, set to 67. We can get air from the make up air fan, but the variable speed controller is not working properly, and not varying the flow. Outdoor units were bolted to their concrete pad.

• Lock and Key onsite to check egress doors
• Mid Columbia forklift onsite
• All-City onsite to fix dishwasher
• H2 PSL construction
• MX optics removal

Vented GV11 body flanges and bonnet annulus volumes and did not observe a pressure communication to CP4 -> disconnected flex line portion of plumbing connecting the to-be-removed-spool between GV11 and BSC6 and blanked-off line -> pumped out GV11 with aux. turbo cart and restored GV11 pumping back to the ion pump.

Carolyn P., Cheryl V., Jodi F., Michael L., Patrick T., Rodney H., Zack H.

Yesterday the mid X (BSC 5) test mass was removed separately from the LOS and stored in a "cake tin". The "cake tin" was wrapped in foil and put on a cart in the back of the optics lab in class A storage. Particle tape samples were taken at four spots in BSC 5.

Carolyn P., Jodi F., Mark H., Matt E., Patrick T., Rodney H., Zack H.

Today we removed all the remaining hardware except for the isolation stack itself. This included the counter weights, telescope, OSEM connector and LOS. The OSEM cable was cut to remove it. The telescope and LOS are wrapped in foil on a table in mid X.

While un-bagging Class-A BSC hardware, I inadvertantly mixed some regular dowel pins with specially-machined Undersized dowel pins (D1100684); these were 1/8" pins, but I can't remember whether they were the 1 1/8" or 1 1/2" length.  After I did this, I measured thickness of pins, but couldn't tell difference; will give this another try.

Other undersized pins have been kept in their Al pouches and are grouped together in the same container.

Condensate pumps for the air conditioner units were added today. More electrical work as well.

We tuned the HEPI pump controller that will regulate the pump speed such that the pressure drop between the chamber inlet manifold and the chamber outlet manifold stays constant. Since there is no chamber hooked up, we controlled the pressure at sensor 4 (after 3 accumulators) on the manifold.
We identified the pump dynamic using a step response. Next, we approximated the pump with a simple model. Then, we tweaked the parameters of the controller using the model. Finally, we measured the closed loop response.
In attachment, you will find:
-	Amplitude spectral density of pressure at sensor 1 (after 1 accumulator) and sensor 4 (after 3 accumulators) for different revolution speeds of the pump.
-	Times series (Step response: Simulations vs measurements)
-	Bode plot (Pump, Open Loop, Closed Loop …). UUG=4.5mHz – Phase margin 60 deg.