This is the last step of the alignment that is done with laser beam outside of the chamber. Once in chamber, we'll have to fine tune it using the real ALS beam.

Tomorrow we will:

1. Install beam diverter cable (all other cables were already installed).
2. Roughly balance the tele/table using a balancing bridge.
3. Weigh the tele/table/cable. We will move the thing from the work table to a big scale (we have this in the EX lab) using a Genie (we have this in the EX VEA but we need to talk with SUS people).
4. Mate tele/table to the suspension under Bosch frame.

Started M1 to M1 transfer functions overnight for PR2 (HAM3). HAM-ISI is damped.

I started a measurement on HEPI-HAM2 for the night (on 'opsws0'). Should be done tomorrow morning around 8am.

The DAMPED->ISOLATED transit script has been updated. What it does:

1. switch the blend filter installed into the first bank (blend_start)

2. turn on the lvl1 isolation loops

3. switch the blend filter installed in bank#4 (blend_low_frequency).

The location of the blend filters could be change later.

The recover scripts for SAFE and READY have also been updated. We'll try them tomorrow.

I ran a Local static test on HAM6-ISI to make sure sensor/actuator wiring is correct throughout the chain.

Results are attached. We drove 1000 counts on each actuator, and looked at the cross-couplings. Main cross-couplings (red) show that V2 actuator needs to have its cable flipped. This is a quick fix that will be performed tomorrow.

It also seem like the responses are not as consistant between corners as we would like them to. Rubbing cable(s) could be the reason.

Upper-level Models were updated for HAM4 HAM5 HAM6 ISIs. Details below:

• Fixed wiring on GS13s, corner 2 and corner 3 were inverted.
• Disabled the payload watchdogs input with a constant (No SUS).

Work was performed under WP4080, which is now closed.

• The new upper-level models were commited under the SVN:
  • h1isiham4.mdl (r5205)
  • h1isiham5.mdl (r5206)
  • h1isiham6.mdl (r5207)

- Stridrite on site to seal cracks on X-Arm

- HAM4,5,6 restart - Hugo

- SUS testing and assembly at EX

- HEPI plumbing work at EY

- IMC and PSL glitchy today, disabled input to IMC servo.

- Removal of the blue lockers in the change room - Apollo

Starting ETMX spectra at 4:25 pm to check health of suspension after Betsy and Travis made some adjustments.

I have used colors to indicate the importance of various bits of the front end STATE_WORD on the CDS overview MEDM. Initially all bits had equal weight. In the new scheme the priority is (from lowest to highest)

OVERFLOW: blue

EXCITATION: purple

WD (no active suspension): YELLOW

active WD and all other bits (timing, running, awg, daq): RED

I will maintain which WD bits should be RED or YELLOW, currently only IMC systems are RED.

Currently, the FSS is not locking. Auto-locking script disabled.

Have completed HEPI Pier Electronics install; just waiting for EE cabling.  I understand this is many weeks away.  On the Pump Station reservoir, hardware and components were swapped for more corrosion resistant styles.  As for the moved tubing, still under pressure.  Lost maybe a psi over the weekend, likely in the noise.  If still holding Tuesday, we'll start refilling the piping for system restart & bleeding.

Good progress has been done this week at LHO. Jaimee installed a first version of the guardian main code ( /opt/rtcds/userapps/release/guardian/python), and I was able to use this code via the command line.

So far, 4 states are defined for the HAM-ISI:

- SAFE -> masterswitch off, watchdogs on

- READY -> all the filters and matrices are installed properly

- DAMPED -> Damping loops are on

- ISOLATED -> For now, the HIGHEST level of control is on

Work done this week:

- the folder infrastructure is defined

- ALL the transit scripts are working and seem robust (some work might need to be done on the DAMPED to ISOLATED transit to make it smarter)

- I wrote some basic recovery scripts for SAFE, READY and DAMPED (we might want to improve them later).

Everything is in the SVN at /opt/rtcds/userapps/release/isi/common/guardian/HAM/

Brett, Jeff, Hugo

Posting a measurement from last week. This data was collected at GPS time 1058659398 (23 July 2013, 5:03 pm PDT).

The data shows the coherence between all 6 ETMY ISIINF channels from 0.1 Hz to 10 Hz. The ISI was damped, with no isolation at this time. These are the witness channels of ISI STG2 in the SUS model that later get projected into the suspension point witness channels. The matrix of data can be read as the coherence from the channel name across the top of the figure to the channel name along the left side of the figure. Note that the data consists of a symmetric matrix, e.g. RX to Y is the same as Y to RX. 

The data shows the most off-diagonal coherence between X and RY, Y and RX. RZ also has some moderate coherence to everything except Z.

The Apollo welders have completed the move of BSC6 piping to BSC10.  The Pump Station in the Mechanical Room was also moved to provide better access to the back side of the station as we now have some extra room given that we only need one Pump Station.  The Pump Station is running in local recirculation mode servo controlled at 10 psi.  The middle recirc valve is choked down to give it some back pressure, please don't adjust.  The VEA side of the piping is under 100psi pressure to monitor for leaks.  If she passes, we'll start refilling the lines next week.
1/2 of the Pier Electronics hve been moved to BSC10; that will get finished Monday.

08:00
Laser Safe
Hugh and Apollo working on HEIP at End-Y

08:45 Cory G. to Mid-Y then going to End-X
10:07 Fire Department on site
10:10 Betsy & Travis working on ITM-X
11:35 Dale escorting a group through the LVEA
12:20 Richard M moved the dust monitor controller from under IMC tube to under H2-IMC
13:01 Thomas V End-Y to remove optical level equipment
13:19 Rick S working in the H1-PSL enclosure 
13:27 Fire Department back on site
15:32 Betsy & Travis at End-X

• Axial Position Error: +2.75 mm
  • Tolerance: ±3.0 mm
• Lateral Position Error: -0.5 mm
  • Tolerance: ±1.0 mm
• Vertical Position Error: +0.43 mm
  • Tolerance: ±1.0 mm
• Pitch Error: ~401 µrad down
  • Tolerance: ±50 µrad
• Yaw Error: ~4.969 mrad CCW
  • Tolerance: ±50 µrad

Moved the Dust Monitor Comtrol box from its position under the IMC Tube to the original location under the H2 IMC.  This is the start of the 485 loop.  The temporary position was in the middle and may have caused some transmission errors.
We will need to move the ethernet connection once more when the infrastructure is complete.

Richard investigated the problem with the ETMX BIO reported in 7313 and got M0, R0 and L1 fixed, but not L2. I verified that actuation and damping now work for M0 and R0, but couldn't check L1 because the OSEMs there are still backed out.

To see whether it will be worth Doug and Jason's time to do alignment tomorrow or whether more mechanical adjustments are in order, I'm starting a round of undamped M0 and R0 TFs on ETMX from 4:10 pm.