(Josh Smith, Stefan Ballmer)

We estimated the IMC transmitted frequency noise due to the PSL intensity noise. The intensity noise explains the IMC frequency noise below 80Hz (the light discrepancy is likely due to me using ISS data from today). Interestingly, this noise also explains the HIFO-Y green readout noise between ~6Hz and ~50Hz (alog entry 7216).

At the time of data taking (7/25/2013, 06:23:53 UTC) the ISS was off, i.e. the MC RIN was high (plot 2).

Conversion:

IMC_trans_freq_noise = f0/L*PWR*(2+1+1)/c/mMC2/(2*pi*f)^2 * RIN

where
f0=2.818e14 Hz (red frequency)
L=16.4736 m    (IMC length, one way)
PWR=164 Watt   (Power in the IMC, = 1 Watt * Finesse/pi, Finesse=516)
mMC2=2.9kg     (Mass of MC2 mirror, same as for MC1 and MC2)
(2+1+1)        (effect of MC2 at 0deg, MC1 at 45deg, MC3 at 45deg)
f              (Audio frequency)

I installed the latest {master model/Medm/scripts} update from Stanford, on the HAM-ISIs (Details, ECR E1300548) 

This new version features the replacement of local biases with Cartesian Biases for the ISIs.  Doing so allows removing the DC value of the CPS readouts of the error signal (biases use) while still keeping information regarding the platform position, and alignment, in the cartesian basis (which we could not do with the local biases).

Master models, MEDM screens and scripts were updated for the HAM-ISI. Every H1 HAM-ISI model was recomplied and restarted. 

Safe.snap files were updated for HAM2 and HAM3 so the local biases are left off when the model is restarted. Snap files are commited under the SVN (r5268)

the DAQ was restarted.

Everything work as expected. Isolation loops are turned back ON on both HAM2 and HAM3 ISIs. 

Details about svn updates can be found in the attached log.

Work was performed under WP4082, which is now closed.

Updates are ready for installation on BSC-ISI as well. 

We added fluid to the main line piping today and the fluid is flowing under servo control at 40psi.

I talked with Richard at Craftsman Flooring today. It appears from the file at Craftsman that we ordered enough material to cover the balance of the VEA floor around the chambers. Bubba knows where at least a partial roll of flooring is (Y-End by emergency exit). So I asked Craftsman to schedule flooring install ASAP, which will be next week. They will call me if they can get here sooner.

It seems that the ISS has been preventing the FSS from locking since yesterday (see alog 7340).

I turned off the ISS autolocker for the moment so that we can go ahead with the IMC locking which is one of the main activities recently.

For the linux-x86_64 workstation, the gds tools have been changed to branch gds-2.16.5 to be consistent with the LHO control room.

The gds tools have been updated to branch 2.16.5.  The gds tools include diag, diaggui, chndump, foton, awggui, ezcaread, ezcawrite, ezcaswitch, ezcademod, ezcaservo, ezcastep, and some other utilites.  Here's a list of more significant changes:

GUI programs (diaggui, foton, awggui):

Expand channel field width in fields and menus that display channel names.

Ability to generate .png files for plots (bugzilla 420)

Update to allow more than 128 tp and awg responses from front ends

Release notes viewable from Help menu (if installed)

For foton:

Modify to report in much better detail errors that are encountered when reading a filter file.  Errors reading a file are indicated by changing the File... button to a red color.  When mouse clicking the red File... button, errors are displayed in a popup dialog box.  (see image 1)
Use caution if the File... button is red.  This indicates that saving the filter file will most likely result in some (defective) filters not being saved.

Change matlab merge batch mode to not display any ROOT graphics.  Batch mode foton returns 0 for successful operation or -1 (255) for failure.  Errors will be written to stdout if any are encountered.

Filters with output ramp set with 0 ramp time will be converted to immediate switching with a warning issued to the user.

Foton preserves filters that consist of only gain(1).

For ezcademod, expanded the number of channels it can read to 200,000.  This is inadequate, and is a stop-gap measure which will have a more permanent fix implemented.

• Longitudinal Error: +1.15 mm (North)
  • Tolerance: ±3.0 mm
• Lateral Error: -0.16 mm (East)
  • Tolerance: ±1.0 mm
• Vertical Error: +0.42 mm (high)
  • Tolerance: ±1.0 mm
• Pitch Error: 10 µrad up
  • Target: 7.8 µrad down
  • Actual Pitch: 2.2 µrad up
  • Tolerance: ±50 µrad
• Yaw Error: 20 µrad CCW
  • Target: 0.0 µrad
  • Tolerance: ±50 µrad

Everything is within spec so we are moving on to the ERMx.

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.