Last week with Andres's help I measured resonance frequencies on SR2 in the double and single hang cases (top locked on stops and middle locked on stops respectively). This log reports the results of fitting the hsts model to that data. The adjusted parameters are listed below with the estimated error bars. Typically I allow d1 (top mass spring tip height) to move. Interestingly, the model had better results when the height of the bottom mass prism was allowed to move instead. Floating d1 did allow the resonances to line up with similar precision, however d1 and I1y  would drift very far from their nominal positions to do this, about 5 mm on d1 and 50% on I1y.

The attachment H1SR2_ModelFit_17Feb2014.pdf shows the measured transfer functions against the nominal model and the model fit. The measured L-P/P-L and T-R/R-T TFs do not show good symmetry, so those comparisons should be taken with a grain of salt. Likely the OSEM balancing is poor as poor balancing will cause errors in the measured zero locations. Similarly, the 1.5 Hzish zero on the measured Roll to Roll TF is probably slightly off from reality. It does not correspond exactly to the measured double hang Roll resonance as it should, and it is also somewhat off from other HSTS suspensions.

The attachment H1L1SR2comparison_17Feb2014.pdf shows the same results but against L1SR2. The new model also fits L1SR2 better, though there are some minor differences.

The new parameter file is on the svn at ...sus/trunk/Common/MatlabTools/TripleModel_Production/hstsopt_H1SR2fit.m

The model fitting code for H1SR2 is on the svn at ...sus/trunk/Common/MatlabTools/TripleModel_Fit/TripPend_GaussNewton_fit_v5_H1SR2.m


Change in parameters from original model with the estimated minimum errors
---------------------------------------
d4: -1.6798 +- 0.094782 mm
I1x: -6.3844 +- 1.2588 %
I2x: -5.2885 +- 11.4653 %
I3x: -3.706 +- 12.1017 %
I1y: 8.8773 +- 0.61371 %
I2y: -5.583 +- 0.5374 %
I3y: -4.6949 +- 0.36401 %
I1z: -5.7573 +- 0.9752 %
I2z: 1.2902 +- 1.0012 %
I3z: -3.2293 +- 0.30808 %
l1: 5.5655 +- 3.3226 mm
l2: 4.2327 +- 0.52961 mm
l3: 1.4169 +- 0.40356 mm
kc1: -1.2835 +- 1.2589 %
kc2: 2.4943 +- 0.4258 %
---------------------------------------

All the SEIs are operating as left Friday evening except the BS.

The BS ISI is tripped with a GS13 trip at 1076474647 followed by an Actuator limit trip 44 seconds later.  So this ISI only lasted for a few hours (til 2043 pst Friday evening.)  The watchdog plotting tools are not functional at this time, and its a holiday.

Taking the ISI back up, I see the current location and target for Rx is a mear 900nrads but this is too much tilt to start with the Trilliums in the loop.

Can a ISC/PRMI Commissioner confirm that we must servo to this value?  Certainly would make getting the IS back on easier if we could reset these targets.

So going up with the 250mHz blends ( with the T240 watchdog trigger level increased the second time.)  Have moved the Stage1 to nominal blends (T250 everywhere with the T100.44NO for X & Y)  Stage2 is also on with the 250mHz blends.  I notice the signal for Z is large on stage2 so I've turned off the Z boost.  It still has some pretty large swings though...  Seems to be some large low frequency oscillation comes and goes.  Will still likely trip I'm thinking.  If it doesn't hold maybe the blend shold be moved back to 750s.  I know Jim is still working on the loops here.

I was starting to see the Epics readouts for the output filters get into the 1000s for the horizontals (already doing the vertical s for a while,) so I switched Stage2 to the 750mHz blends.  This certainly reduced these readback's magnitude right away.  I've reenabled the Z boost now as a result.

I'll leave the ISI at this for the moment: Stage2 Lvl2 with 750mHz blend, Stage1 is Lvl2 with T100mHzNO.44 blends on X & Y and T250mHz elsewhere.  Sadly, the BLRMS needs a lot more green.

Given that it's a holiday, there are no operators on site to silence the alarm chorus.  There are some CDS alarms that I can't quite identify the source of, but the CDS system looks ok on the whole, so I'm just silencing them temporarily.

There does seem to be a persistent alarm from the EY dust monitor.  I ACK'd it once when I came in, but it was back again a couple minutes later.

The ALS-X BBPD appears to have gone dark around 2:30 PST on Friday.  The EX laser IR PD and fiber monitor PDs appear to have been disturbed around the same time, but they have recovered.

Possibly this is related to Friday's work on installing WFS on the ISCTEX table, or the related editing of the X-end simulink models.

Over the weekend both frame writers have restarted in the early hours. fw1 just after midnight Sat morning (00:01) and fw0 this morning at 01:00. They had both been very stable over the past week.

(Blue Team)

Short progress report:

• All necessary electronics modules and chassis have been installed in EX.
• All cables were installed.
• Beam profiles were measured and the sensor heads are installed on ISCTEX.
• The isc model has been updated to include code for the ALS WFS.
• The asc model has been updated to receive the angular feedback signals and to provide the green transmitted light.
• Slow inputs into the alignment servos are available to support camera spot position of ITM and ETM.
• Feedback paths are available to control the ITM and ETM mirror orientations but not TMS.
• The ALS end station medm screen has been updated to include the ALS WFS.
• The slow controls system in EX has been updated to support the new whitening chassis.
• There are currently no readbacks for the demodulator RF monitors.

More details to follow.

I set up the H1 ODC master channel: H1:ODC-MASTER_CHANNEL_OUT_DQ

The "H1 Interferometer Summary" bit (bit0) now includes the following bits:
Bit4:  PSL Summary (EPICS timing only)
Bit5:  IMC Summary
Bit 21:ADC overflow (for PSL, EPICS timing only)
Bit 22:DAC overflow (for PSL, EPICS timing only)
Bit 23:EXC on       (for PSL, EPICS timing only)
Bit 28:Guardian Observation Ready
Bit 29:Operator Science Mode Button

The guardian that will be serving bit 28 is not running yet.

I noticed from the ODC summary that the ISS was running out of range again. I  changed the set point (ISS_REFSIGNAL) from -1.93 to -1.88.

I also verified  that this was not due to a noise eater oscillation (ODC didn't indicate it as such, and toggling it didn't change it.)

Foton files were cleaned up for every SEI platform (ISI + HEPI). Details about the cleanup process can be found in SEI aLog #370

Every SEI platform was turned off, had its filter coefficient reloaded, and turned back on exepted ETMX ISI and HEPI, which ISC commissioners needed. ETMX's platforms will get their filters reloaded at the next window of opportunity.

Work started at 4:50PM and just finished. It was performed under WP #4435 which is now closed.

SEI crew (Jim, Hugh, Hugo) left its platforms in the following state:

• HAM2
  • ISI
    • Blend: 01_28
    • ISO: Lv3
  • HEPI:
    • Blend: Pos
    • ISO: Cont_1 + Boost_1 (Position Loops)
• HAM3
  • ISI
    • Blend: 01_28
    • ISO: Lv3
  • HEPI:
    • Blend: Pos
    • ISO: Cont_1 + Boost_1 (Position Loops)
• HAM4
  • ISI
    • Blend: 01_28
    • ISO: Lv1  (Fake Level 2 and Fake level 3 are available for guardian testing)
  • HEPI:
    • Blend: Pos
    • ISO: Cont_1 + Boost_1 (Position Loops)
• HAM5
  • ISI: OFF
  • HEPI: OFF
• HAM6
  • ISI: OFF
  • HEPI: OFF

• ITMX
  • ISI
    • Blend
      • ST1: TCrappy 
      • ST2: TCrappy
    • ISO
      • ST1: Lv3
      • ST2: Lv3
  • HEPI:
    • Blend: Pos
    • ISO: Cont_1 + Boost_1 (Position Loops)
• ITMY
  • ISI
    • Blend
      • ST1: T250mHz on RX, RY, RZ - T100Hz on Z - T40mHz_NO.44 on X and Y 
      • ST2: 250mHz on X,Y, 750mHz on the other DOF
    • ISO
      • ST1: Lv3
      • ST2: Lv3
  • HEPI:
    • Blend: Pos
    • ISO: Cont_1 + Boost_1 (Position Loops)
• BS
  • ISI
    • Blend
      • ST1: T100mHz_0.44 on X and Y, T250mHz on the other DOF
      • ST2: 250mHz Blend
    • ISO
      • ST1: Lv2
      • ST2: Lv2
  • HEPI:
    • Blend: Pos
    • ISO: Cont_2_a +Cont_2_b + Boost_2 (Previous commissoner legacy, unclear what they are)
• ETMX
  • ISI
    • Blend
      • ST1: 250mHz blend (because of wind's impact on microseism?) 
      • ST2: TCrappy
    • ISO
      • ST1: Lv3
      • ST2: Lv2
  • HEPI:
    • Blend: Pos
    • ISO: Cont_1 + Boost_1 (Position Loops)
• ETMY
  • ISI: OFF
  • HEPI: OFF

Hugh and I mostly finished cabling ETMY ISI today, but were held up by an issue with the CPS's and some broken test feed thru components. After we powered up the CPS's, we were systematically disconnecting sensors to verify routing and we noticed that the corners 2 and 3 were acting weird. After rounds of calling Richard, plugging and unplugging various cables, we figured out that the ribbon cable that carries the sync signal from the satellite rack chassis to it's power/distribution board was plugged in backwards. The other racks have keyed cables to prevent this, but this rack had an unkeyed cable. After fixing this we found that we also have a dead sensor, further debugging has that narrowed down to a broken probe. We don't have time today to finish balancing, so we'll continue on Tuesday.

Late entry, DAQ restart performed at 15:59PST.

Restarted the DAQ for three reasons:

• h1iopsusey new INI file following model change
• h1asc and h1iscex new INI files following model change
• new DAQ Broadcaster channel list

The frame broadcaster had the following channels added

8:50      PSL Check ok. NOTE: ISS Diffracted Power is low (1.4%) and unstable with peaks over 20%. It should be 5-15%)
9:00-12:00 Going to End X to do cabling – Luis/Filiberto
10:00-12:00 Baffle work (disassembling contaminated scrapple baffle, searching for parts for arm cavity installation, and general cleanup) in LVEA West bay – Mitchell
11:01-11:03 DAQ restart – Dave
11:10-11:45 heading into the LVEA to get parts – Gerardo
12:12-12:15 Change h1iopsusey model to remove the DC OSEM component from the software watchdog – Dave 
14:15-15:51 PCAL assembly on H2 PSL – Joe
14:22-   Taking some parts to End Y – Corey
15:02-15:50 Back into the LVEA West bay (Searching and organizing Baffle parts – Mitchell
15:59   DAQ restart - Dave

NOTE: I noticed that the ISS Diffracted Power has been unstable today. It was about 1.4% in the morning with high peaks over 20% during the day (is this normal?). Based on one of the PSL trainings it should be 5-15%. I have added some pics from today and one from the last 5 days.

We could not close the ISO loops on HAM4-ISI yesterday, even thought those are Level 1 generic loops. We ran transfer functions overnight, which allowed me to tweak the symmetrization filters. I also corrected a few minor typos in the unit-specific scripts. 

ISO Lv1 loops are now stable with any of the 4x blend filters installed:

• 750mHz
• 250mHz
• 100mHz
• 01_28

I duplicated ISO Lv1 into the filter modules reserved to Lv2 and Lv3. Those use more that one filter bank. I filled the extra filter banks with gains of one. Same goes for the Boost filters. Those only use 1x filter module though.

Here is what is loaded in the ISO filter banks:

• ISO Lv1:
  • FM0 : Cont_1
  • FM9: Boost_1_t2
     
• ISO Lv 2:
  • FM1: Fake_2_a
  • FM2: Fake_2_b
  • FM8: Boost_F_2
     
• ISO Lv3:
  • FM3: Fake_3_a
  • FM4: Fake_3_b
  • FM5: Fake_3_c
  • FM6: Fake_3_d
  • FM7: Boost_F_3
     

I tried turning on different combination of ISO and DAMP with the control scripts. They all worked. HAM4-ISI good to go as far as starting Guardian testing goes! 

Will resume on Tuesday

The SR2 Scrapper Baffle (D1200922) was found to have been contaminated sometime during storage. This was discovered while staging for install on HAM 4. The baffle has been dis-assembled and taken to clean and bake to be re-classed. 

WP#4447
Created new h1iopsusey model to remove the DC components of the ETMY software watchdog. At the same time I did the same for TMSY though this is not used in the WD trigger circuit. Related changes to the safe.snap and the MEDM screen were made. at 12:17 local time the h1susey models were stopped to install the new IOP model. I tested the WD using the PANIC button on the SUS DACKILL. I then restarted the h1susetmy and h1sustmsy models, burt restoring to 11am today.
A DAQ restart is needed for the IOP model, can wait till later.

ETMX hepi tripped, there was activity in the end station electronics rack when the trip happened.  

The scripts for plotting the trip, the command scripts for HEPI and the ISI and the buttons to switch the blend filters don't work on the Imac's at the end station.  Alexa is working on bringing ETMX back up from the control room.  

Jim and I emulated the Sensors and they look correct so we are go for complete sensor plug in.  We are still rigging up the CPS and some of the coil driver feedthrus need replacing.  It might be optimistic that we'll run transfer functions tonight but maybe.  We should be floated and balanced for sure though by the end of the day.