JimW GregG

HEPI actuator attachment started today at BSC9. Jim and I were able to get all of the vertical actuators attached with very little movement on the system so far. However, the vertical actuators are still locked and any moves to HEPI should be avoided until the install is finished.

•	Moving ISCT EX table from LVEA to air lock at end x -> Apollo
•	The dust monitor (unit#3) that was in the "beer garden" has been moved to the East door side of the BSC3 cleanroom -> Richard 
•	Site fumigation -> Sprague
•	Installing cables into HAM 5 and 6 IO chassis -> Aaron
•	The front end computer was powered down to allow EE work on the IO Chassis of h1sush56 -> David 

Alog from yesterday. Did in-rack cabling for the STS-2 Seismometer Distribution Chassis for BSC1, BSC2 and BSC3. Each distribution chassis fans out to the HAM ISI chambers (HAM2-HAM6). The following schematics were used for reference: D0901301, D1000298, D1101576, and D1101584.

See attached for the physical location of each seismometer.

Filiberto Clara 

to permit EE work on the IO Chassis of h1sush56 the front end computer was powered down at 13:47 and back up at 14:26 (PDT) when the work was completed.

Clipping problems encountered in the PRC at LLO have led to the discovery that the PRC scraper baffle "Z Plates" were built with an aperture approximately 0.75" too small. The PR2 scraper baffle assembly installed in H1 will require removal and re-work. For more detail please see the following link to the LLO log.
https://alog.ligo-la.caltech.edu/aLOG/index.php?callRep=9200

For the record, Richard is moving the dust monitor that was in the "beer garden" to the East door side of the BSC3 cleanroom.  Data drops and high alarm levels will be seen this morning during the move.

[Mark Arnaud]

Results of ETMX M0 and R0 phase 3a (in chamber, in air) transfer functions from yesterday night have been processed and are plotted in the attached documents.

(1) Comparison between undamped M0 TF and model

(2) Comparison between undamped R0 TF and model

(3) Comparison between undamped M0 TF LHO phase 3a (in chamber), phase 2c, and LLO phase 2c

Main chain of ETMX is matching well the model cf (1), meaning it was freely suspended during the alignment (cf 8126). Only two modes of pitch are shifted down, which is a feature we already saw previously (cf (2) and alog 7415)

R0 measurements are not matching the model as well as M0, meaning something might be rubbing. Transverse and yaw degrees of freedom are very noisy. It makes sense for yaw, since the watchdog tripped when it was beeing driven, although it is not clear yet for transverse cf (2). It could be an issue in the actuation chain and I will take a closer look tomorrow.

In the process of adding subsystem links to the ODC channels I came across some inconsistencies in the medm macro files:

ISI:
there exist currently

/opt/rtcds/userapps/release/isi/common/medm/isibs_overview_macro.txt
/opt/rtcds/userapps/release/isi/common/medm/isietmx_overview_macro.txt
/opt/rtcds/userapps/release/isi/common/medm/isietmy_overview_macro.txt
/opt/rtcds/userapps/release/isi/common/medm/isiham2_overview_macro.txt
/opt/rtcds/userapps/release/isi/common/medm/isiham3_overview_macro.txt
/opt/rtcds/userapps/release/isi/common/medm/isiham4_overview_macro.txt
/opt/rtcds/userapps/release/isi/common/medm/isiham5_overview_macro.txt
/opt/rtcds/userapps/release/isi/common/medm/isiham6_overview_macro.txt
/opt/rtcds/userapps/release/isi/common/medm/isiitmx_overview_macro.txt
/opt/rtcds/userapps/release/isi/common/medm/isiitmy_overview_macro.txt

and

/opt/rtcds/userapps/release/isi/h1/medm/bscisi/isibs_overview_macro.txt
/opt/rtcds/userapps/release/isi/h1/medm/bscisi/isietmx_overview_macro.txt
/opt/rtcds/userapps/release/isi/h1/medm/bscisi/isiitmx_overview_macro.txt
/opt/rtcds/userapps/release/isi/h1/medm/bscisi/isiitmy_overview_macro.txt
/opt/rtcds/userapps/release/isi/h1/medm/bscisi/isitst_overview_macro.txt
/opt/rtcds/userapps/release/isi/h1/medm/hamisi/isiham2_overview_macro.txt
/opt/rtcds/userapps/release/isi/h1/medm/hamisi/isiham3_overview_macro.txt
/opt/rtcds/userapps/release/isi/h1/medm/hamisi/isiham4_overview_macro.txt
/opt/rtcds/userapps/release/isi/h1/medm/hamisi/isiham5_overview_macro.txt
/opt/rtcds/userapps/release/isi/h1/medm/hamisi/isiham6_overview_macro.txt
/opt/rtcds/userapps/release/isi/h1/medm/hepi/hepiham1_overview_macro.txt

and

/opt/rtcds/userapps/release/isi/l1/medm/bscisi/L1_isibs_overview_macro.txt
/opt/rtcds/userapps/release/isi/l1/medm/bscisi/L1_isietmx_overview_macro.txt
/opt/rtcds/userapps/release/isi/l1/medm/bscisi/L1_isietmy_overview_macro.txt
/opt/rtcds/userapps/release/isi/l1/medm/bscisi/L1_isiitmx_overview_macro.txt
/opt/rtcds/userapps/release/isi/l1/medm/bscisi/L1_isiitmy_overview_macro.txt
/opt/rtcds/userapps/release/isi/l1/medm/hamisi/L1_isiham2_overview_macro.txt
/opt/rtcds/userapps/release/isi/l1/medm/hamisi/L1_isiham3_overview_macro.txt
/opt/rtcds/userapps/release/isi/l1/medm/hamisi/L1_isiham4_overview_macro.txt
/opt/rtcds/userapps/release/isi/l1/medm/hamisi/L1_isiham5_overview_macro.txt
/opt/rtcds/userapps/release/isi/l1/medm/hamisi/L1_isiham6_overview_macro.txt


more that
1) h1 and l1 files are named differently and
2) some common files exist

SEI needs to sort out which ones we need to use



Also, for HPI, there exist:
/opt/rtcds/userapps/release/hpi/h1/medm/hepi/hepibs_overview_macro.txt
/opt/rtcds/userapps/release/hpi/h1/medm/hepi/hepiham1_overview_macro.txt
/opt/rtcds/userapps/release/hpi/h1/medm/hepi/hepiham2_overview_macro.txt
/opt/rtcds/userapps/release/hpi/h1/medm/hepi/hepiham3_overview_macro.txt
/opt/rtcds/userapps/release/hpi/h1/medm/hepi/hepiham4_overview_macro.txt
/opt/rtcds/userapps/release/hpi/h1/medm/hepi/hepiham5_overview_macro.txt
/opt/rtcds/userapps/release/hpi/h1/medm/hepi/hepiham6_overview_macro.txt
/opt/rtcds/userapps/release/hpi/h1/medm/hepi/hepiitmy_overview_macro.txt

and

/opt/rtcds/userapps/release/hpi/l1/medm/hepitemplate/L1_hpibs_overview_macro.txt
/opt/rtcds/userapps/release/hpi/l1/medm/hepitemplate/L1_hpietmx_overview_macro.txt
/opt/rtcds/userapps/release/hpi/l1/medm/hepitemplate/L1_hpietmy_overview_macro.txt
/opt/rtcds/userapps/release/hpi/l1/medm/hepitemplate/L1_hpiham1_overview_macro.txt
/opt/rtcds/userapps/release/hpi/l1/medm/hepitemplate/L1_hpiham2_overview_macro.txt
/opt/rtcds/userapps/release/hpi/l1/medm/hepitemplate/L1_hpiham3_overview_macro.txt
/opt/rtcds/userapps/release/hpi/l1/medm/hepitemplate/L1_hpiham4_overview_macro.txt
/opt/rtcds/userapps/release/hpi/l1/medm/hepitemplate/L1_hpiham5_overview_macro.txt
/opt/rtcds/userapps/release/hpi/l1/medm/hepitemplate/L1_hpiham6_overview_macro.txt
/opt/rtcds/userapps/release/hpi/l1/medm/hepitemplate/L1_hpiitmx_overview_macro.txt
/opt/rtcds/userapps/release/hpi/l1/medm/hepitemplate/L1_hpiitmy_overview_macro.txt


Note that
1) they have different name structures at the different sites
2) not all files exist for hanford
3) they are in different sub-directories




========================


I plead for standardization and sanity!

Today, during our contamination control discussions, Gerardo discovered that the X-beam tube manifold purge valve was still closed.  He opened it and the BSC3 soft cover showed sights of life billowing outward a bit.  So, it seems that since the vent ~10 days ago, we have only had the MC purge enabled which was not enough to supply positive pressure to all of the vented volume.  Darn.

To improve hampered HEPA flow at the BSC3 entrance (the walking plates almost completely occult the line-of-sight to the cleanroom ceiling HEPAs), I have set the draw fan previously used in chamber cleaning near the front of the chamber door through the soft wall curtains.  I have not turned it on because I am waiting for a particle counter to magically appear near the door to monitor the dust level (ehem, also ~10 days late).

ITMY now has two HEPI controllers installed (both of which work I think)

Control Level one is a positon sensor only ~5Hz UUG  in all DOF (VP and HP are AC coupled at some low frequency (<1mhz))

Control Level two, uses the second set of blend filters (lil bit iso) just the second button and has ~10Hz UUG (5Hz for VP and HP)

  It blends X,Y Z and rZ at about  0.5Hz  and rX and rY at about 0.8Hz

  I tried to design with minimum gain peaking every where (< a factor of two if you believe  linear control theory, which HEPI doesn't always)

  I characterized this controller in /ligo/svncommon/Seisvn/seismic/HEPI/H1/ITMY/Data/Spectra/Preformance_A.xml

There are three screen shots from this dtt attached, the Ref plots are with HEPI controls ON

The orange like color  and green are the ISI stage 1 T240 modal signals HEPI on/off

The pinkish  or grey and blue are the HEPI L4C signals on/off

red and pinkish are sts2 ground signals during the two tests

I don't really believe all of that isolation in the rotational directions, not sure why it is there .....

  **** the HEPI on script doesn't seem to be working so well hopefully this will get fixed soon ****

~ 09:00 - 11:00 Thomas and Gerardo working on baffle installation in BSC3
Dave restarted the models and IOP on H1SUSH34
Roofing and insulation removal continuing

• Y axis position: -199.93 mm
  • Target: -200.0 mm
  • Error: +0.07 mm
  • Tolerance: ±1.0 mm
• Z axis position: -79.97 mm
  • Target: -80.0 mm
  • Error: +0.03 mm
  • Tolerance: ±1.0 mm
• Yaw: 6 µrad CCW
  • Target: 0 µrad
  • Error: 6 µrad
  • Tolerance: ±10 µrad

Over the last few days I've been taking some passive noise spectra of the ISI-CPS on HAM6 to try and determine what the best grounding strategy is (Jeff made a nice cartoon of the options in T1300871).

Along the way I found out a few things

  1) The HAM 6 CPSs had two problems that canceled each other out

                 There as a master in each crate  (the box near the chamber that hold the CPS controllers)

                 and the cable which brings the sync signal from the power board was either bad or plugged in backwards (it isn't keyed)

                I tunred one of the masters into a slave and replaced the cable

  2)  All of the racks that I have tested have there chasis grounded, so placing them on a cable tray creates a ground and possible ground loop.

  3) Currently it is pretty likely that ALL of the CPS that are installed have grounds in the electroncs room rack AND at the chamber (Ground Loop Gaore)

  4) The resistance to ground from the power cable ground to the chamber is 0.6ohms

  5) the sync cable carries a ground from one rack to the next

 After fixing the problems I took spectra under three conditions

   Multiple grounds (electroncs room and chamber) these were bad

  Single ground in the electronics room, red and green lines in the attached png (clean room on/off are the differences)

  Single ground at the chamber, blue lines in the attached png

   Given that set of data i think that we should plan on converting to a single ground at the chamber.

   The attached pdf shows one spectra converted to m/rthz and the expected noise (we have measured something close to the expected noise on the bench for every unit in use)

  I don't really know what to say about this except yuck

Both HAM2 and HAM3 chambers are now fully controlled (HEPI+ISI). 

Those chambers feature:
- Standardized ISI damping loops (defined in: SeiSVN/seismic/HAM-ISI/H1//Scripts/Control_Scripts/Version_2/Step_4_Damping_Filters_H1_ISI_.m)
- Standardized ISI blend filters (SeiSVN/seismic/HAM-ISI/Complementary_Filters_HAM_ISI/HAM-ISI_Generic_Comp_Filters.mat)
- Hybrid aLigo/eLigo blend filters are available (SeiSVN/seismic/HAM-ISI/Common/Blend_filters/Filters_HAM_ISI_Blend_Hybrid_24_Jul_2013.mat)
- All 3 levels of ISI isolation loops (UGF=10Hz, 25Hz, 35Hz - LHO aLog # 5355). Performance is mostly limited by the blend filters. Level 2 controllers give similar amount of isolation as Level 3. Level 2 controllers are prefferred for now - ISI Perfomance can be found in LHO aLog #7414

- HEPI position blend filters (IPS signals are multiplied by 1, L4C signals are multiplied by 0)
- HEPI position loops. UUG = 2 Hz. Should be set to 5Hz soon. HEPI position loops performance plots, and controllers, can be found in LHO aLog #8037.

Trun on Process:

Prepare:

1. Use the command button to shut down any kind of control on both HEPI and ISI.
2. Make sure the border of the ISI screen is green. If not, check the Watchdogs (model, Dackill, IOP dackill, SUS) and the master switch.

Damp ISI:

1. Use the command button to turn on the damping loops on the HAM-ISI.

Turn on HEPI:

1. Make sure that the following are in the correct state for HEPI: Watchdogs (model, Dackill, IOP dackill, SUS, ISI) and the master switch.
2. Open the IPS screen. Be careful there are 2 of them. One for the vertical sensors, and one for the horizontal sensors. 
3. In this screen, make sure that the alignment offsets are loaded and engaged. We want them to be set at the opposite of the locked hepi IPS redouts referrenced in LHO aLog# 7180
4. Open the DC bias screen and make sure that everything is disengaged - it should be.
5. Repeat (4) for the Sensor Correction screns, the ISC mon, the feedforward (FF) and the Twist.
6. Make sure that offsets are disengaged ont he OUTF screens. Be careful there are 2 of them as well. 
7. Push both gain sliders to 1.
8. Engage the Blend filters named "Pos"
9. Make sure signals come out of those filters. If not, refer to LHO aLog #7299, and follow Sebastian's instructions
10. Check the IPS 2CART matrices. For now, they should look like that. If not, use SeiSVN/seismic/HEPI/Common/MEDM_Functions_HEPI/Populate_Matrices_HEPI.m to fill them out. Do not use Populate_MEDM_Screen_HEPI.m instead, as it will reset a lot of the things you just worked on.
11. Use the "Isolate <Chamber> Lvl1" button of the HEPI command screen, to engage the position loops

Engage the isolation loops, on the ISI

1. Open the Sensor correction block and make sure that everything is disengaged.
2. Open the blend filters block. Make sure that filters named "01_28" are selected. These are the generic blend filters mentioned above.
3. Open the command screen of the ISI ou are working on
4. Wait for the readouts to stabilize
5. Use the "Reset CPS offset button" to reset the CPS biases. 
6. Press the "Store Target offsets" button. This will store the current position so the ISI can be steered back there once the isolation loops are engaged
7. Use "Turn on Lv. 2 isolation loops for ...." button, and wait for the isolation loops to get engaged.

Arnaud P. Betsy W. 

Did B&K hammer measurements on Friday feb 8th on the BeamSplitter that will be installed in BSC2. 
Config: BSC-ISI Unlocked, QUAD Unlocked, Baffles ON, Vibration Absorbers ON, Damping ON.

Attached, pictures describing the position of hammer impacts, and accelerometer + corresponding pulse files.