(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.

(Corey, Eric, Jeff, Jim)

Continued to do what was needed to fascilitate BSC Assembly.  This occurred mainly on two fronts (with a third attack at the end of the day).

Hunt For Missing Hardware

Decided to go through all the class-A-ed BSC Hardware.  This yielded some missing washers.  Since some SUS hardware turned out to be in an SEI bag, Jeff B. scoured SUS hardware and found some bolts for us.  Now we are down to just two missing pieces of hardware:  3/8-16 x 2 1/4" & 3/8-16 x 2 3/4" SHCS. 

Filled up most of our empty Cleanroom racks with all kinds of hardware today (still have a few bags to forage through upstairs).  For today, roughly 12 man-hours was devoted to searching for missing parts.  

Clean & Bake Assistance

To help get some of our plates through the process, some manpower was used to help out at the VPW.

Optics Table Flipper & Reaming Hardware

This stuff was recently Class-B-ed.  The SEI team is checking for fit as I type.

Rodney, Zak, Kyle, Jodi

LOS/stack extraction at MX has been going on since 1:00.
Further preparations for the MY BSC move.
Work on air conditioning and plumbing of coolant lines for the H2PSL chamber.
Modular building continues to settle into place.

Air conditioner units were installed inside the PSL enclosure. They are hanging from threaded rods, suspended from the roof. The rods themselves are sitting on rubber machine mounts to isolate the units from the enclosure. Electrical conduit lines were installed as well.

Leaving aux. turbo pump cart running and valved-in to GV10 annulus (known leak to annulus from BSC6 side of GV10)

(Corey, Jeff, Jim, Mitch)

Workspace Converted From HAM -> BSC

Over the last 3-4 weeks, the SEI Cleanrooms were cleared of HAMISI parts/hardware/tooling to make room for BSC work (this involved TONS of wrap/bag/tag & organizing).

Stage2:  Optics Table

Helicoils were completed last week (installation & tang-breaking) on the bottom-part of the Optics Table.  We are now waiting for fixturing to flip the Table over.  We will then install the Top-part of of the Optics Table

Subassembly Work Begins:  Enter Actuators & Lockers

Parts and hardware for the Actuators and Lockers have been unwrapped and staged in our Cleanroom racks.  Have begun helicoiling parts for the Large Actuator.  A few issues:  5/16-24 helicoils were inadvertantly installed on parts.  The correct 5/16-18 helicoils are being installed---a first fit-check shows that the bolts are really tight in these helicoiled holes.  We do not have a tool for installing #10-32 helicoils--it is on order.

This activity has enlightened us to the complexity of keeping track of hardware, and the importance of bagging/tagging parts correctly (and also paying attention to the names written on bags).  We are missing a couple of items, but we are addressing these issues as we go.

Stage0 Work

- Blade Posts are loosely installed (still waiting on big 1/2" socket to torque down bolts). 

- Torqued down Stage0 (wrench-tight) to the Test Stand via threaded rods/nuts (note:  one of the nuts was not installed because the threaded rod had bad threads).

- Level of Stage0 was checked---it is level to within 0.005"

HAMISI#3:  Moving Out

It has been decided we will postpone testing on this Assy.  (So, we'll need to put a few days into removing GS13s, payload, cabling, etc. on this Assembly.  It will eventually be pulled out and put into a storage container---once the container is modified for use).

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.