BSC ISI #2 & #3 Assembly Status

(Corey, Jim)

BSCISI#2

Cleared out the cleanroom of clean parts and covered the ISI system, so hole-drilling could occur on the Test Stand (these holes are for the Cabling Interface Panels).  2/3's of the holes were drilled yesterday.

BSCISI#3

Finished off helicoiling parts for the Small Actuators.  Large plates probably won't be loaded in the oven until Thursday (making them available some time early next week).

ICC

The crew (Mark L., Zack H., Scott H., Nicole) finished "brushing" with the air drill in BSC-7 this afternoon. They cleaned up a few spots that required hand-work and then started the Vacuum-Wipe Down-Vacuum phase. The air drill continued to present problems (2 small bearings blew out). Joe V. and Dave W. worked on air drills and got 2 units through initial cleaning/inspection and replaced the small bearing on drill 14. The new vice for clean assembly of tools in the LVEA is on-site and the arbor press should arrive tomorrow.

Isolated IP11 from Y-end, started rotating pumps and valved in MTP to Y-end

Kyle, Gerardo

Switched Y-end from ion pump to turbo pump.

Richard M. needs to deenergize IP11's controller and relocate it

"Lack" of minus signs Anti-Aliasing and Anti-Imaging Chassis

During the initial sign checking and electronics shake-down for H2 ITMY.

When we first got ITMY hooked up we observed an apparent Sign shift for the input signals "H2:SUS-ITMY_M0_OSEMINF_F1_IN1" etc.

During my sign check, offset sign check, etc.: All OSEM Basis and Euler Basis offsets were inversed. I requested a positive offset, but observed a negative offset in the suspension. 

I inverted all OSEMOUTF_GAINS for M0 and R0. Ran through the sign and initialization checks in the beginning of the metal-build testing procedure and confirmed all was well.

H2 PSL installation

The acoustic door was installed today. The door and threshold (floor plate) caulking is still drying, so please do not step on the threshold or move the doors. Yellow caution tape is covering the door opening.

H2 ITMY Ground to L3 TF

I recorded time series data of the L3 Dummy Mass using a QPD. Attempted to retrieve seismometer data (LHO H0 PEM LVEA), but found that a channel was saturating. After having it looked at (another cable not connected to the correct port), I confirmed we were recording data. Took another set of time series data with the QPD at the ITMY L3. After a cursory inspection of the results it appears that L3 Yaw and L3 Pitch are scaled versions of each other. Further inspections to be conducted to diagnose for possible electrical/electronic issues.

H2 ITMY Binary I/O "Fixed"

A full checkout of ITMY electronics functionality at the testing/user level has not been performed, but we are able to drive and observe physical responses at the M0 Top OSEMS and R0 Top OSEMS.

The apparent cause of failure appears to have been swapped cables, somewhere in the electronics racks, that were not immediately noticeable. Further testing to be conducted in order to confirm full functionality (i.e. will start testing ITMY).

According to the dwg the BI/O cards are in the left most slot on the back plane but are actually in the right most.  The cables were installed correctly the first time then labeled and reinstalled backwards this led to the BI/O not functioning.

BSC ISI #2 & #3 Assembly Status

(Corey, Eric, Jim, Mitch)

BSCISI#2

It has been decided that we will live with the 0.030" counterclockwise twist in the system.  So the next step is to balance the Stages and then adjust the Lockers accordingly (the desire is for the system to move minimally [0.000-0.003"] when locked and unlocked).  What we will lose here is that we will not be able to use the Alignment Pins when transporting the system (they won't work because the 0.030" is enough to not align the Pins in their holes.

Since we are hoping to receive GS13's (and other seismometers) soon, we have decided to wait on positioning Lockers until we can install these Sensors (so that we don't end up re-doing balancing).

BSCISI#3

Have been at a standstill for the overall assembly because we have been waiting on large plates; however yesterday, we received the balance of our plates (8 in total), and half of these will be loaded in an oven today.

Stage0 has been assembled and is on the Test Stand.  Unfortunately, we only had two Blade Posts, so only two have been installed on Stage0.

For background work, have focused subassemblies.  As of last night, we are roughly about ~90% done with all the assemblies (i.e. Small/Large Actuators, Lockers, Flexures, Sensor Assemblies).  We are missing a few parts and won't be able to finish them until we get the parts (i.e. 1-3/8" bolts for the Lockers and the Small Actuators for example).

Holes Not Tapped Correctly On Batch Of Small Actuator Magnet-to-Stage2 Interposer Plates (D0902134)

While helicoiling parts yesterday, it was noticed that one part had issues with a hole.  For D0902134, the 1/4-20 holes for it weren't tapped correctly.  They were too small for the helicoils and a bolt wouldn't fit in.  Found this issue with the (3) we pulled out for BSCISI#3.  So, ran a 1/4-20 Helicoil tap in all of these holes.  We should check to see if we have this issue with other plates and how many others.

Believe there was some operator error on some of the holes I helicoiled because when a bolt was run through some holes the bolt was noticeably "loose".  I believe this is due to me not tapping very straight and taking several attempts to tap the hole--just need to make sure to start straight and not make several attempts!

WRT the problem with D0902134, it appears the 1/4-20 helicoil tap was done from the wrong side, and is not a complete thru tap. After looking at 6 more of these parts and trying to install helicoils in 3, I found that the helicoils could be installed from the back side of the part. The helicoil must then be threaded in as far as it will go so the bolt can reach.

Ops Day Shift Summary

Further preparations at MX for BSC removal.
Gregorio worked at MY on oplev testing.
Sno Valley showed up to work on chiller maintenance with Ski.
More chamber cleaning in BSC7.
ASD appears to be trending NDL.

X end station

Sno Valley performed spring cleaning of the X end station chillers.  Chiller 1 and CWP1 were turned on and Chiller 2 and CWP2 was turned off.
Sno Valley will be out tomorrow to perform maint. at Y end.
Changed AHU3 prefilters on 7/14/11
Pettibone forklift has new steering tires installed

MidX Support Tubes on chocks and strapped down--Door is back on.

The Support Tubes are chocked in place--a small step in T1000627.
The Support Tubes are lowered into cradles (chocks) by lowering the external scissors tables.  They are then secured, strapped down if you will, with wire cables to lugs on the chamber wall.  After the external support structure is next removed, further securing of the Support Tubes will then be done on the outside of the chamber.

Thanks to Mark, Nicole, Chris and JimW

LHO HEPI Plumbing at BSC8

The Apollo Welders are working out the routing for the HEPI Plumbing on the West side of BSC8.  Attached are a couple of photos.  First the main lines are coming from the East under the chamber and turning up to a valve.  This is the West side of BSC8.  The lines then turn horizontal to a manifold.  The 1" lines branch out to four 1/2" lines that then run over to the "corner" of the chamber and turn up to head for the HEPI Housing at the top of the Pier.  The criss-cross is for supply and returns going to each Pier.
The second photo shows the lines running vertically close to the chamber to the left of the View ports and finally turning horizontal again and connecting to the four-way recirculation valves.  We hope to have given as much access as possible to the viewports for potential use.
Robert has looked over the installation and he isn't concerned about noise.  JohnW has blessed it with regard to chamber/spool access.  We'll be close to the plumbing when ever the spool is removed and need to be aware of that.  We may have interfered with RichardM and cable trays but he wasn't too concerned about dealing with the plumbing/valve plates.

Ops Day Shift Summary

BSC4's dome was floated and placed back in position successfully.
Chamber cleaning continues to continue in BSC7.
HEPI installation is presumably still happening somewhere.
More work setting up ISI test stand #2.
Prep work at MX for the removal of BSC5.

Vented X-mid

Kyle, Gerardo

Ops Summary

Transition to laser safe
Richard, S & K Electric: pull innerduct from H2 electronics buildings to MSR
BSC7 chamber cleaning
Optical lever work
Cheryl, Sheila: Remove viewport on south side of HAM4. Take pictures from ISCT4 of POX steering mirror illuminated by flashlight through viewport.
Tour by physics students from the Netherlands
Transition to laser hazard for squeezer work

H2 RCG upgraded to latest 2.3 branch

I upgraded the H2 systems to the latest 2.3 branch version. This will give team-ISI the new immediate readback feature for the controlled filter modules needed to synchronize digital and analog filters.

Our version of 2.3 had some local mods, which I backed up before the upgrade.

The main surprise from the upgrade was that the slope line in the generated ini files changed from 6.1028e-05 to 6.1035e-04. Since the General Standard ADC has a 40V peak-to-peak range over 64k counts, a simple calculation

40/(1024*64) = 6.1035e-04

shows the new value is correct. This value is used by NDS clients if a count-to-volts conversion is needed. The front end systems use counts only.

HAM 10 HEPI Install

HAM 10 now has the HEPI piers, enclosures, and crossbeams installed. The support tubes have not been leveled yet but will be today.

The west side lifted up when the crossbeam was placed first on the east side. I think this could be reduced by clamping the crossbeam down while it is still supported by the crane. This, however, would monopolize even more time with the crane. It has been possible to adjust the height with the set screws on the HEPI foot, but this has been fairly difficult and the screws bind occasionally. So the less height adjustment needing to be done from the foot the better.

X1 Beam Tube module pressure with small ion pump.

This is 24 hours of pumping on X1 beam tube with a 75l/s ion pump located at CP2.

Plot of Beam Tube module pressure with small ion pump, 6 days trend.