To support the OutputFaraday Isolator Suspension (OFIS), I created a new Mathematica single pendulum model with two blades but four wires (as opposed to two for HAUX/HTTS). It lives in the SUS SVN at

^/trunk/Common/MathematicaModels/FourWireSimpleBlades

I exported Matlab matrix elements symbexport1blades4wiresfull.m from the Mathematica, copied them to the Matlab single model at

^/trunk/MatlabTools/SingleModel_Production

and adjusted the ssmake1MB.m file to use them when the new parameters pend.dx1 and pend.dx2 are defined. These represent the double-sided wire attachment point separations in the Mathematica x direction (normal to the line between the blade tips).

Because the OFIS is TMTS-style with the optic axis of the payload at right angles to the superstructure compared to most other suspensions, I created a new define_ofisModel_insandouts.m file which mapped MEDM-style L/T/V/R/P/Y to Mathematica y/x/z/pitch/roll/yaw. Note that because of the limitations of the data structure (swaps but no sign changes), I wasn't able to do x->-T, y->L, z->V but had to settle for x->T, y->L, z->V, which is left-handed.

I created a case 20140625OFIS of the Mathematica model using mostly data from D0900623-v8 and D0900136-v5. I chose the blade stiffness to match the measured V mode frequency of 1.509 Hz from LHO alog 11530 and added damping to match the measured L, T and V Q's. I also added a token amount of damping in each angular DOF. The parameters and mode frequencies are summarized at 

https://awiki.ligo-wa.caltech.edu/aLIGO/Suspensions/OpsManual/OFIS/Models/20140625OFIS

The model L and T modes (0.6374 and 0.6306 Hz) are in good agreement with the measured L and T modes (0.6211 and 0.6248 Hz) without any additional tweaks. Unfortunately I didn't do measurements of the angular modes because the damping spec was only about the linear modes. Note the obnoxious R mode at 25.4 Hz.

I exported a Matlab parameter set and copied it to the Matlab directory as ofisopt_damp.m. 

I added a new clause to the switch statement in generate_Single_Model_Production.m to associate the new parameter set with the tag ofisopt_damp. I also added lines to use the new define_ofisModel_insandouts.m when the parameter file name starts with 'ofis', but left them disabled initially.

I adapted plottest.m to do a comparison plot between TFs generated in Matlab (using the standard define_singleModel_insandouts.m), and TF data in FourWireSimpleBlades_20140625OFIS_TF.m exported from Mathematica. After some debugging I got perfect agreement.

In the process of debugging I realized that the damping parameter names being exported from Mathematica (e.g., pend.bx0) didn't match what the Matlab was expecting (e.g., pend.B0xx), so I changed the Matlab to match the Mathematica. I also adjusted the handcrafted (not exported) hauxopt_damp.m and httsopt_damp.m that I'd created previously.

Finally I enabled the code in generate_Single_Model_Production.m to select define_ofisModel_insandouts.m. The rewiring was copied from TMTS and is probably right but I can't think of a good additional test because the OFIS has no sensors or actuators so we can't do measured TFs to compare.

Everything has been committed to the SVN.

While HWS was starting their work in HAM4, they discovered that they needed the FirstContact removed from the SR2 and SR3 optics.  After bantering about possible other work arounds or schedule rearrangements, we decide we needed the access to HAM5 immediately.  (The major schedule contributor being that many people, Apollo included, are not here the rest of the week and HWS crew leaves at the end of the week.)  So, Bubba is pulling the crew together to get the door off and we're collecting FC removal tools. 

After the corner went laser safe today, TVo, Matt, and I removed the dam which we had placed between BSC2 and BSC3.  This enabled the red IAS beam to propogate to HAM4 for HWS alignment work there.

The new h1hwsey computer has been installed and powered up at EY.  This computer matches the computers previously installed at EX and in the MSR.

At about 7:51AM PDT, the 24V power to the EY suspension I/O chassis was turned off at the power supply for reasons unknown.  It may have been an over current trip, or accidental.   The power was turned back on, and the computers were restarted about 11:00 AM PDT.

Aidan, Greg, Thomas, Cyrus, Jim, Dave B.

We finished installing all the electronics, optics and the computer for the ETMX HWS yesterday.

Electronics:

The elecrtonics are described in E1100891-v12. The actual ETM HWS electronics are limited to:

1. Dalsa (Hartmann) Camera Switch

2. RCX CLink (CameraLink to Fiber-optic converter) switch

Both these channels were confirmed to be working in EPICS and Beckhoff.

Also, we connected the fiber-optics between the camera and the framegrabber on the computer. We confirmed a successful connection by running the serial communications program and bringing up the camera parameters on the computer screen (see attached photo).

Issues:

Cable 3 in E1100891 (5-pin Conec in-table power cable for the electronics) uses three of 5 pins. The wrong pins were connected in that cable (PINS 1,4 and 5 were used but we were supposed to have PINS 1, 2 and 4). I fixed this cable in the EE shop.

Optics:

All the optics are aligned. The return green beam is centered on the Hartmann plate. We still need to move the Hartmann sensor along the optical axis to place it at the conjugate plane of the ETM HR surface.

Numbers and stuff:

Computer: h1hwsex (10.105.0.150)

RCX CLink at Camera SN: AS3751

RCX CLink at Frame grabber SN: AS3700

HWS Camera SN: 14011241

ISS alignment
HWS Alignment
No work on ITM's
In-chamber laser dams coming out
EY TCS work
Optics alignment on HAM4
Apollo moving engine hoist from one E to the other E

model restarts logged for Tue 01/Jul/2014
2014_07_01 10:09 h1iopsusb123
2014_07_01 10:11 h1iopseib1
2014_07_01 10:16 h1hpiitmy
2014_07_01 10:16 h1isiitmy
2014_07_01 10:19 h1iopseib2
2014_07_01 10:21 h1isibs
2014_07_01 10:22 h1hpibs
2014_07_01 10:23 h1hpibs
2014_07_01 10:24 h1iopseib3
2014_07_01 10:26 h1hpiitmx
2014_07_01 10:26 h1isiitmx
2014_07_01 10:28 h1susbs
2014_07_01 10:28 h1susitmx
2014_07_01 10:28 h1susitmy
2014_07_01 10:29 h1susitmy

no unexpected restarts. Install of SWWD on b1,2,3.

Rick S, Peter K, Matt H

More detailed report to come, but quickly... after a lot of long long days, I think we can mostly claim success that we think we have the ISS array aligned with ~50mV DC readouts from all 8 phtoodiodes (more detailed alog will hopefully have a description of the  temporary setup had to get this). We still dont see anything on the QPD though. Maybe as not enough power. Will have one last look tomorrow.

So just some tidy up work now to do on it before claim success (ie lid back on, put baffle back in place (which will need laser light for). I would say 30mins (lets say an hour to be safe :-)). Just to tired to finish it tonight.

Also before we attempt the LLO one I think we need a few modifications/solutions to make it a more efficient process. But we/I have learned alot from this one.

Start of session in cleanroom:

All zero

Start of session in chamber:

0.3um...10 counts

remainder zero

End of session in chamber 6 hours later

0.3um..0 counts

remainder...zero

Earlier today I updated it and added a GPS time channel for testing. I just updated it again.

There are 34 unmonitored TCS channels. (see attached)

ISI ST1 and ST2 ACT tripped at 1088286405 GPS. (Jul 01 2014 14:46:29 PDT)
HPI ACT tripped at 1088286647 GPS. (Jul 01 2014 14:50:31 PDT)

Plots are attached.

08:34 Karen at end Y
08:48 Peter to H1 PSL enclosure to check problem with laser
08:48 Jeff B. to HAM 2,3,4 to work on contamination control
08:49 Filiberto to end Y to work on TCS cabling
09:11 Cyrus restarting the EPICS gateway for the vacuum subnet
09:16 Jeff B. out of the LVEA
09:21 alarm for end Y rollup door open
09:31 Karen leaving end Y
09:43 Cyrus done with EPICS gateway restarts
10:06 Dave restarting the IOP and user models for SUS and SEI BSC 1,2,3 to complete software WD updates
10:32 Dave done with model restarts
10:32 Justin transitioned the LVEA to laser safe
10:35 Call from Praxair driver to inform delivery is ~15 min away
10:51 Dave, Jim B. to end X to install HWS computer
11:08 Rick to join Matt and Peter in the H1 PSL enclosure to help address a water leak on the laser table
11:55 Jeff B. and Andres out of the LVEA
11:55 Dave and Jim B. back to end X
12:12 Jim B. back from end X
13:05 Matt to HAM2 to start ISS alignment work
13:57 Jeff B. and Andres to HAM 4,5 to work on contamination control
14:09 Cyrus to end X to install a patch panel and check the HWS computer
15:19 Cyrus done at end X, going to install patch panel at end Y
15:19 Justin transitioning the LVEA South and East bay to laser hazard
15:33 Jeff B. and Andres done in LVEA
15:39 Arnaud starting measurements on SUS ITMX

I received the patch panels required to finish the wiring at EX and EY, so I installed them this afternoon.  I had to briefly disconnect the vacuum rack switch at EX to re-route a fiber that was in the way.  This closes out WP 4684.

will be running overnight

J. Kissel, A. Pele

Given the confusion of installation status vs what guardians are running what and why, I've brought all corner station guardians down to their equivalent SAFE or OFFLINE or UNLOCKED or DOWN state, and then paused them. These should not be unpaused again until we close up a given chamber and the install is complete. 

ETMX and EMTY should still be maintained under guardian control, and operators should make sure that they are fully isolated / aligned at all times until further notice.

The latest results from the X1 QUAD08 tfs -after Joe Odel/Jeff B/Andres R reworked on the quad to replace the top mass blades and rebalance the masses- are attached below and compared with the previous measurements from last week. This work was initiated to resolve the 10% discrepancy seen between the measured and modeled 2nd pitch mode frequency (1.32Hz) cf 5th page of 1st attachment. Though, the comparison shows this mode has stayed unchanged, except for a new pitch to vertical coupling at 2.25Hz.

Mark B. and Gerardo

Yesterday (4/22/14) Gerardo and I measured the vertical mode Q of the OFIS for three different positions of the ECD block to try to get the Q in the specified range of 25-30.

The OFIS was set up on the optical bench in the H2 laser enclosure. The ECD block sits on a tray below the payload which is supported by four groups of vertically pointing screws at accessible positions around the edge of the structure. Gerardo had earlier attempted to set the ECD block at the nominal height using the spacer tool provided but found that this was too high and caused interference. He therefore lowered the block until it was just barely clear plus approximately an extra two turns of the 1/4-20 screws. This was our starting point for further adjustments.

To measure the vertical Q, we used the laser pointer and QPD from the monolithic violin mode setup and used a convenient screw on the top of the payload to partially block the beam. We displayed the "pitch" output of the QPD box on a digital oscilloscope with a 1 sec/div timebase and photographed the screen to capture the data. I read off the peak positions with GraphClick, and worked out the logarithmic decrement and Q with Mathematica.

For the initial position, the Q was 10.7. We lowered the ECD by one turn on all the screws and got Q = 18.9. We lowered the ECD another half turn and got Q = 23.3. Finally, today (4/23/14) we lowered the ECD another 3/4 turn and got 27.8, which is in spec.

Attached is a JPG of the setup, a PDF of all the screenshots, and for the fourth and final run, the Mathematica notebook, PDF thereof and the raw data.