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Reports until 08:27, Wednesday 16 April 2014
H1 CDS (DAQ)
david.barker@LIGO.ORG - posted 08:27, Wednesday 16 April 2014 (11375)
CDS model and DAQ restart report, Tuesday 15th April 2014

model restarts logged for Tue 15/Apr/2014
2014_04_15 11:35 h1hpiham4
2014_04_15 11:38 h1pemcs
2014_04_15 12:15 h1broadcast0
2014_04_15 12:15 h1dc0
2014_04_15 12:15 h1fw1
2014_04_15 12:15 h1nds0
2014_04_15 12:15 h1nds1
2014_04_15 12:16
h1broadcast0
2014_04_15 12:16 h1fw0
2014_04_15 12:20 h1hpiham5
2014_04_15 12:23 h1hpiham2
2014_04_15 12:23 h1hpiham3
2014_04_15 12:26 h1hpibs
2014_04_15 12:26 h1hpiitmx
2014_04_15 12:26 h1hpiitmy
2014_04_15 12:28 h1hpietmx
2014_04_15 12:28 h1hpietmy
2014_04_15 12:29 h1hpiham6
2014_04_15 16:39 h1susquadtst
2014_04_15 21:03
h1fw1

A busy maintenance day. All restarts expected except the second start of h1broadcast0 and the later restart of h1fw1.

H1 SUS (AOS, CDS, SYS)
jeffrey.kissel@LIGO.ORG - posted 18:25, Tuesday 15 April 2014 (11373)
Optical Lever Damping Cleanup
J. Kissel, A. Pele

We've begun the clean up and unification of design for optical lever damping that has begun to slowly and differently percolated through suspension types and sites. Arnaud has created a library part called 
${userapps}/release/sus/common/models/FOUROSEM_STAGE_MASTER_OPLEV.mdl
a week or so ago which has been used in the modified 
${userapps}/release/sus/common/models/QUAD_MASTER.mdl
part which covers a generic QUAD suspension. However, there were still a few bugs in that library part which I fixed up:
 - breaking a vestigial link to the beam splitter master library part, 
 - connecting the ODC damping status up and out to the top master level adding two new bits

We've not compiled anything and the MASTER model parts remain uncommitted. We'll compile, install, restart, and restore, and then clean up MEDM screens tomorrow.

Note that we are cleaning up this stuff so that we can make progress on all of the ECRs that HAVE been approved, including watchdog clean up, adding EPIC storage of alignment offsets, adding dither alignment paths, and adding BSFM M1 to M2 stage damping. 

Debate over whether to include optical lever damping in DRIVEALIGN path (which contains frequency dependent alignment decoupling [say if the P2Y coupling is large] and the plant compensation filters [to convert complicated P2P and Y2Y transfer functions into single-pendulum-like transfer functions]):
- Currently QUADs feed optical levers through DRIVEALIGN matrix, motived with the argument that "we shouldn't have 10 different paths to actuate on a stage. If we put the effort into 'diagonalization' of one path, it should apply to all other control loops."
- The BSFM does NOT feed through, because it was put in quickly before any such discussion was had, or any effort was put in to 'diagonalization'
- The HLTSs currently have no optical lever damping, but LLO commissioners have requested it.
- If we use Arnaud's FOUROSEM_STAGE_MASTER_OPLEV for all three (QUAD, BSFM, and HLTS) suspensions' lower, FOUR OSEM stages, then we'd only have one library part to maintain. Good.
- HOWEVER, we've already approved to have M1 to M2 stage damping on the BSFM, which means it's M2 (FOUROSEM) stage has to stay unique.
Gosh darn it. Note LHO hasn't measured if we see the same SNR and damping improvement that LLO got from this unothordox extra damping...

H1 TCS
david.hosken@LIGO.ORG - posted 17:32, Tuesday 15 April 2014 - last comment - 09:35, Wednesday 16 April 2014(11372)
TCS update/status
DavidH, Greg, Thomas

TCSX: Plumbing sorted (except for one last connection to water-cooled beam dump, awaiting fittings), optics mounted and optical mounts are positioned on the table ready for alignment. Optics that are not within table are accounted for. Last few cables are to be connected.

TCSY: Enclosure re-cleaned, plumbing connected up (except for beam dump) and water manifolds in final positions, laser/RF driver cables are all dressed and connected to feed-throughs.

See images for current TCSX/Y table layouts
Images attached to this report
Comments related to this report
justin.bergman@LIGO.ORG - 06:45, Wednesday 16 April 2014 (11374)

Have we located the keys for the table door locks?

greg.grabeel@LIGO.ORG - 09:35, Wednesday 16 April 2014 (11380)
They were found in the enclosure after David was able to tidy up.
H1 SEI (INS)
hugh.radkins@LIGO.ORG - posted 17:01, Tuesday 15 April 2014 (11371)
WHAM5 SEI HEPI Activities/Status--2 Actuators Attached, 6 to go

Late start but this morning I lifted the HEPI with it's DSCW Springs to pull the elevation within spec: -325.7mm vs -325.3 so less than 0.5mm low.  The Dial Indicators show that the position remains within spec.

After that, I got the first Horz L4C Leveled and then the first vertical Actuator attached.  After lunch (1400) Scott joined me and we leveled another L4C and attached the second vertical Actuator.  The 3rd L4C is leveled now and we'll continue tomorrow.

Departed the LVEA ~1645pdt.

H1 CDS (SUS)
david.barker@LIGO.ORG - posted 16:59, Tuesday 15 April 2014 (11370)
Started h1susquadtst model in LVEA

WP#4553

I modified the h1susquadtst model to use the latest QUAD_MASTER model. I terminated the new ports. This permitted the build and install of the h1susquadtst model, which was then started on the h1susquadtst computer (located in the LVEA in the old H2 One Arm Test racks). This model will be used for SUS work in the LVEA on the test stands in the near future.

We decided to not add this model to the DAQ at the moment. We can add it later if needed.

This is not a standard front end, so I've greyed out non-applicable bits on the STATE_WORD overview.

This closes WP4553.

H1 SEI
stefan.ballmer@LIGO.ORG - posted 16:35, Tuesday 15 April 2014 - last comment - 08:57, Wednesday 16 April 2014(11368)
ITMX and ETMX damping now
ITMX and ETMX ISIs are damping now, so that seismic people (Rich) can get an input spectrum on a windy day. I will be walking around the end station optics table, but quietly. 

Sheila
Comments related to this report
sheila.dwyer@LIGO.ORG - 08:57, Wednesday 16 April 2014 (11377)

Don't know why it tripped

Images attached to this comment
H1 General
andres.ramirez@LIGO.ORG - posted 15:59, Tuesday 15 April 2014 (11367)
Ops Shift Summary
8:05 Network work – Jonathan
8:32 Doing Baffle inventory by West bay (LVEA) – Jodi
8:35-9:28 CDs Digital Cameras EPICS IOC updates – Cyrus
9:15-12:52 TCSx table work (LVEA) – David
9:43 Water delivery
9:46-12:00 HEPI work on HAM5 – Hugh
10:35-12:28 Cable work on SR3/SRM (LVEA) – Travis
11:35 HEPI master model update - Hugo
11:37-14:20 Inspecting Voltage Control Oscillators in LVEA - Pablo 
11:40-15:06 Praxiar LN2 delivery to CP4 at MidY
12:14 DAC restart – Dave
12:55 Checking Dust Monitors in Optics lab – Jeff
12:56 Heading to End Y (cleaning) – Karen
13:16 TCSy table work (LVEA) – David
14:00 HEPI work on HAM5 – Hugh
14:25p-14:45 Taking a tour into the LVEA – Dale
14:40 Crystal chiller refilled (Maintenance) - Andres
15:30 Heading to EndX – Sheila
15:55 Heading to End Y - Pablo

H1 CDS (DAQ, PEM, SEI)
david.barker@LIGO.ORG - posted 15:11, Tuesday 15 April 2014 (11364)
CDS maintenance summary

WP#4569 Change name of h1peml0 model (Dave)

The name of the model h1peml0 was changed to h1pemcs to be consistent with the naming scheme and the internal channel names. The required changes to rtsystab,  testpoint.par, master (daq),  overview MEDM screens, H1EDCU_DAQ.ini

WP#4567 New HEPI models (Brian, Hugo, Hugh and Dave)

The new hepitemplate.mdl file was updated, and all eleven HEPI models were compiled and installed. At that point Hugo restarted the models and performed testing with Hugh. Please see Hugo's alog for details.

Weather Stations Added to DAQ

H0EDCU_WEATHER.ini was modifed to add back the EY and MY weather stations to the DAQ.

Digital Video EPICS channels added gto DAQ

A new H1EDCU_DIGVIDEO.ini file was created with all the EPICS channels for cameras 1 through 20. This was added to the DAQ master.

Beckhoff INI and REQ updates

The latest Beckhoff INI and REQ files were generated. No change to the INIs. One REQ channel was removed from ECATY1_PLC2. This required a reconfiguration of conlog, whose channel count decremented from 122,675 to 122,674.

DAQ Restart

To apply the pemcs and weather changes, the DAQ was restarted at 12:15PDT.

restart logs:

2014_04_15 11:35 h1hpiham4
2014_04_15 11:38 h1pemcs
2014_04_15 12:15 h1broadcast0
2014_04_15 12:15 h1dc0
2014_04_15 12:15 h1fw1
2014_04_15 12:15 h1nds0
2014_04_15 12:15 h1nds1
2014_04_15 12:16 h1broadcast0
2014_04_15 12:16 h1fw0
2014_04_15 12:20 h1hpiham5
2014_04_15 12:23 h1hpiham2
2014_04_15 12:23 h1hpiham3
2014_04_15 12:26 h1hpibs
2014_04_15 12:26 h1hpiitmx
2014_04_15 12:26 h1hpiitmy
2014_04_15 12:28 h1hpietmx
2014_04_15 12:28 h1hpietmy
2014_04_15 12:29 h1hpiham6
 
2014_04_15 11:35 h1hpiham4
2014_04_15 11:38 h1pemcs
2014_04_15 12:15 h1broadcast0
2014_04_15 12:15 h1dc0
2014_04_15 12:15 h1fw1
2014_04_15 12:15 h1nds0
2014_04_15 12:15 h1nds1
2014_04_15 12:16 h1broadcast0
2014_04_15 12:16 h1fw0
2014_04_15 12:20 h1hpiham5
2014_04_15 12:23 h1hpiham2
2014_04_15 12:23 h1hpiham3
2014_04_15 12:26 h1hpibs
2014_04_15 12:26 h1hpiitmx
2014_04_15 12:26 h1hpiitmy
2014_04_15 12:28 h1hpietmx
2014_04_15 12:28 h1hpietmy
2014_04_15 12:29 h1hpiham6
H1 General
andres.ramirez@LIGO.ORG - posted 14:56, Tuesday 15 April 2014 (11363)
Maintenance
Crystal chiller refilled.
H1 IOO (ISC)
kiwamu.izumi@LIGO.ORG - posted 14:27, Tuesday 15 April 2014 - last comment - 08:33, Wednesday 16 April 2014(11359)
IMC was not locking, fixed by steering PZT pit

[Sheila, Kiwamu]

Sheila had a difficulty in relocking the IMC. So I looked into it to figure out what is happening and fixed it by steering the PZT pit.

It was apparently due to a misalginment, mainly in pitch according to the GigE views. Looking at one-day trend, I found that the PZT pit suddenly had changed its value from 400 to -240 counts at around 8:20 am local. A mysterious point is that , after the PZT jumped, the IMC was still able to lock itself for approximately 4 hours.Then it ran into a situation where it was not able to hit the LSC trigger. I didn't see a significant drift in any of the MC suspensions. I fixed it by steering the pitch of PZT back to +300 counts. It relocked right away and we ran the offload script so that it doesn't loose the good alignment by a unclok. We should keep our eyes on this PZT.

The attached is the one day trend.

Images attached to this report
Comments related to this report
daniel.sigg@LIGO.ORG - 08:33, Wednesday 16 April 2014 (11376)

I changed the PZT offsets this morning to account for the temperature drop in the laser room over night. Robert then increased the nominal, so it is expected that the alignment shifts back towards the older settings. The correct way is to use the centroid of the reflected beam when not locked and steer the PZT to the same position. Dave added theses channels to the frame, so they can be trended (if you can figure out how they are named). We probably should add an error condition to the IMC locker which checks this at the beginning.

H1 ISC
stefan.ballmer@LIGO.ORG - posted 14:21, Tuesday 15 April 2014 (11353)
control state definition running for H1ECATX1PLC2
Chris, Daniel, Stefan

We implemented the first operational version of a control state definition (LIGO-T1300958). We chose the x-end PLC2 ethercat system to test the code.

The related files are currently in als/common/guardian, but will likely have to move again.
 - PLC2_X.xml:     the xml file defining the control state
 - PLC2_X.py:      auto-generated python code using Daniel's csdinfo utility, based on PLC_X.xml (currently only available in windows, but soon to be ported to unix by Chris)
 - csd_PLC_X.db:   data base for the new epics channels controlling the control state. Also auto-generated by csdinfo, based on PLC_X.xml
 - csd_PLC2_X.adl: auto-genereted medm screen, created from csd_PLC_X.db using makeMEDMfromDB
 - makeMEDMfromDB: bash script for generating medm screens from data base
 - csd_PLC2_X.cmd: ioc startup file for launching the epics data base


A guardian instance controls the global state machine (see LIGO-T1300958). It implements the states "SAFEOP" and "OP". It also has dry versions of each state for testing - they only log differences as opposed to enforcing the settings. The guardian can be started by
  guardmedm H1ECATX1PLC2

The IOC was started on h1guardian0 using
  softIoc -D /ligo/apps/linux-x86_64/epics/base/dbd/softIoc.dbd csd_PLC2_X.cmd 

The associated MEDM screen can be started with 
  medm -x csd_PLC2_X.adl 

Remarks:
 - more work is needed to make the loading process smooth - most importantly csdinfo has to run on unix.
 - the xml file likely still needs some tweaking to properly work with the Beckhoff auto-locker.


Attached text files:
 - xml file - the source of everything
 - the auto-generated py file
 - the auto-generated db file
 - script generating the medm screen

Attached screen shots:
 - guardian for the global state machine
 - medm screen for the new state variables for PLC2
Images attached to this report
Non-image files attached to this report
H1 AOS
sheila.dwyer@LIGO.ORG - posted 14:04, Tuesday 15 April 2014 - last comment - 14:35, Tuesday 15 April 2014(11355)
ITMX trips

The first one I was switching blends, plot attached.  The next two we don't know why they happened, we only got one plot.

Images attached to this report
Comments related to this report
sheila.dwyer@LIGO.ORG - 14:11, Tuesday 15 April 2014 (11357)

I tried moving to Tcrappy and it tripped again as I tried to turn it on

Images attached to this comment
stefan.ballmer@LIGO.ORG - 14:34, Tuesday 15 April 2014 (11360)
Hugo found that the problem was that some gain switches were set incorrectly.  This is something that it would be nice to have the Guardian control. 

PS, this is sheila
hugo.paris@LIGO.ORG - 14:35, Tuesday 15 April 2014 (11361)

Input gains were turned off on half the T240. We turned them back on, and ITMX is now running on TCrappy.

H1 SEI (ISC, SEI)
hugo.paris@LIGO.ORG - posted 13:13, Tuesday 15 April 2014 - last comment - 14:43, Tuesday 15 April 2014(11351)
HEPI Update allows 60s worth of saturations on L4Cs
 
LHO commissioners recently complained of having to recover from too many HEPI-L4C trips. 
 
HEPI master model and MEDM screens were updated to allow 60s worth of saturations on the L4C signals before tripping HEPI. The script used by commissioners to temporarily disable HEPI-L4C WD was turned off.
 
 
The Saturation Counters Work as Follow:
   - There is one saturation counter per sensor group (i.e. L4C, IPS, ACT, ...)
   - Counters get incremented every time a sensor of the group overpasses its WD safe threshold
   - The HEPI overview screen border turns orange when any of the platform's saturation counter is superior to 0. 
   - The platform trips whenever one of its saturation counters reaches the maximum amount of saturations allowed.
   - All channels, but HEPI L4Cs, are allowed 10 saturations.
   - HEPI L4Cs were temporarily allowed to take 60s worth of saturations (122880) before tripping HEPI. 
   - One does not need to wait for a WD trip to reset the saturation counters. Saturation counters can be reset anytime by pushing the WD reset button. 
 
 
Update Details:
   - HEPI master model and MEDM screens were updated
   - Every HEPI model as recompiled.
   - Every chamber was turned off (~11:30am)
   - HEPI safe.snap files were updated, and commited to the SVN.
   - HAM4-HEPI was restarted.
   - Hugh manually shook HAM4-HEPI so we could see the L4C saturation counter going up, until it tripped HEPI.
   - Every HEPI model was restarted.
   - HEPIs were turned back on (~12pm).
 
Work was performed under WP 4567, which is now closed.
 
Images attached to this report
Comments related to this report
jameson.rollins@LIGO.ORG - 13:36, Tuesday 15 April 2014 (11352)

To be absolutely clear, my understanding is that the new threshold is NOT actually 60s worth of saturations, but

60 * (model sample rate in Hz) samples worth of single-sample saturations that will now cause trips.

This is a big and important distinction.  The first will trip after 60s worth of continuous saturations; the second will trip in an indeterminate time after the first saturation after a reset.

Please correct me if this is not right but this is my understanding of the new behavior, and it's important that everyone is clear on it.

hugo.paris@LIGO.ORG - 14:43, Tuesday 15 April 2014 (11362)

60 x (model rate) = (number of saturated samples allowed) is what I coded into the master model, and what I meant by "60s worth of saturations" without realizing it could be misunderstood.

HEPI-L4C saturation counter will keep accumulating regardless of whether the saturations are continuous or not, until the reset button is pushed, or HEPI trips.

Images attached to this comment
H1 SUS
jeffrey.bartlett@LIGO.ORG - posted 15:14, Monday 31 March 2014 - last comment - 15:00, Tuesday 15 April 2014(11092)
H1-SR3 Phase2b Transfer Functions
Andres R. & Jeff B.

   We made several centering adjustments to the BOSEMs and reset all to 50% light. The latest set of transfer functions show the undamped coupling issues in the 03/25/14 data have been reduced or eliminated. The plots for the last set of TFs are attached below. The plots for the power spectra taken on 03/25/14 are also included.   
Non-image files attached to this report
Comments related to this report
arnaud.pele@LIGO.ORG - 15:00, Tuesday 15 April 2014 (11358)

Because the spectra looked suspicious in the low frequency band, I retook some data from yesterday with SR3 on the test bench (M3 osems were disconnected), and compared it with the last measurements. In fact, the feature is not present anymore (green after vs blue before).
Other than this, spectra and transfer functions look acceptable for installation.

Non-image files attached to this comment
H1 SUS
arnaud.pele@LIGO.ORG - posted 17:01, Wednesday 06 November 2013 - last comment - 17:16, Tuesday 15 April 2014(8409)
PRM TF round 2

Last friday, Betsy and Travis added weight to the middle mass of SRM currently on the test stand, in order to center the flags with the osems cf alog 8367. A first round of TF have been taken before that, showing clean measurements. A new set have been taken monday night to assess that there's no major change. The new results are showing an excellent match with the previous ones
 

Results in attachments are described below :

(1) H1 SUS SRM M1-M1 (top mass) comparison between modeled and measured undamped transfer functions for the 6 dofs

(2) H1 SUS SRM M1-M1 comparison between modeled and measured damped transfer function for the 6 dofs

(3) H1 SUS SRM M1-M1 undamped TF comparison before and after adding weight to the middle mass

data have been commited under the svn

Non-image files attached to this report
Comments related to this report
arnaud.pele@LIGO.ORG - 08:47, Friday 08 November 2013 (8436)

I meant SRM in the title

arnaud.pele@LIGO.ORG - 17:16, Tuesday 15 April 2014 (11369)

For acceptance review I also added the spectra of SRM during phase 2b (currently plugged on the test bench).
The first 3 pdfs are showing the effect of the top mass damping on each stage. The last two pdfs are comparing SRM spectra with other hsts suspensions (PRM and SR2) during phase 2b, damping off and damping on.
Everything looks good for all osem signals, damping is working fine by significantly reducing the Qs of the resonances, and both damping on and off spectra are similar to other HSTSs at the same 2b stage of testing.

Non-image files attached to this comment
H1 SUS
arnaud.pele@LIGO.ORG - posted 15:35, Friday 11 October 2013 - last comment - 16:03, Tuesday 15 April 2014(8085)
PR3 H1 L1 spectra comparison

As for the HSTSs, I took a spectra of PR3 from Monday. The isolation and damping loops of the ISI were closed (isolation level 3), as well as the damping loops of the suspension. The chamber was still under vacuum. Status of HEPI needs to be double checked.

The attached plot compares the spectra of LHO and LLO PR3, in a similar configuration (ISI isolated, SUS damped), for the 3 levels (M1 M2 and M3) and every degree of freedom.

Looking at the plots, we can see that LLO get more isolation at each level, even though we are using the same damping filters. That said, Jeff discovered that the suspension medm gains are set to different values, (higher values at LLO) which would explain why the resonnances of the suspension are more damped there. Other than this, spectra is very close to sensor noise. The larger signal between 0.1Hz and 1Hz is highly due to ground motion (I quickly took a spectra of the streckeisen sitting next to HAM2 chamber,  which shows the same shape around 0.1Hz) More details to come next week.

Non-image files attached to this report
Comments related to this report
arnaud.pele@LIGO.ORG - 17:20, Wednesday 06 November 2013 (8410)

Attached is the same document with the individual osems included

Non-image files attached to this comment
arnaud.pele@LIGO.ORG - 16:03, Tuesday 15 April 2014 (11366)

For acceptance review, attached is a phase 3b comparison of PR3 spectra damping on vs damping off. HAM2 ISI was in its isolated state, and HEPI was running under position control during the measurement.

Non-image files attached to this comment
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