Work will begin shortly on the LHO aLOG upgrade. Please save any open drafts so that they are transferred over to the new server. WP#8237

We were just knocked out of observing by some SDF difference in TCS. Not sure what it was, I can't find the link to the screen on the SDF overview and it resolved itself before I could get any where. 

TITLE: 06/12 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 114Mpc
INCOMING OPERATOR: Jim
SHIFT SUMMARY: locked all shift
LOG:

• alarm on PT-524, has not restarted

H1 is locked in Observe, range is trending up, currently at 116Mpc

• PT-524 tripped off earlier today, and is in a restart mode, where it's trying to come back on
• Chandra alogged this earlier today:  alog 49807
• Corey alogged this in his summary: alog 49804
• I talked to Gerardo when it alarmed at 00:25
• I've attached a plot, to show PT-524 tripping off, and showing it's 4 attempts are restarting
• attempts will continue, which means the alarm will be sounding periodically, until restart

J. Kissel, S. Dwyer
WP: 8239

As Jenne "concisely" explained in pgs 8-21 of G1900965, we've been exploring the implications of large IFO beam spot positions on the DARM and ASC control system. As you know, H1's currently operating with spot positions on test masses rather far away from geometric center of rotation (in the few 10s of mm range). With these spot positions, the problems of length-and-angle coupling comes to a head at the L2 (PUM) stage of all the QUADs, especially that which are used for DARM control (i.e. for us, in O3, ETMX)  One of the ideas to combat this multi-layer cross-coupling is to 
    (a) have the option of feeding the output of the L2A filters feed back in to the A2L filters, and
    (b) split the A2L filters into two parallel paths -- one for scalar spot position control, and two for mechanical, frequency-dependent A2L decoupling.

I've implemented this infrastructure change today to help facilitate the prototyping of such schemes. 
No new scheme has been *implemented* yet, the new infrastructure was built to be backward compatible, and is now running in a functionally identical way as before.

Attached are screenshots of the simulink model changes (1st is before, 2nd is after), and of the MEDM screen changes (3rd is the overview change, and 4th is the new screen).

The change only required modification of 
    /opt/rtcds/userapps/release/sus/common/models/
        FOUROSEM_DAMPED_STAGE_MASTER_WITH_DAMP_MODE.mdl
-- the obnoxiously named library part for all QUAD's L2 stages (used by both the QUAD_MASTER.mdl and QUAD_ITM_MASTER.mdl larger library parts for the two types of QUADs [frustratingly only differing by their ESD driver control]).

However, the impact on screens was a little bit larger: I created a few new screens,
    /opt/rtcds/userapps/release/sus/common/medm/quad/
        SUS_CUST_QUAD_L2_DRIVEALIGN_L2A2L.adl
        SUS_CUST_QUAD_L2_DRIVEALIGN_L2A2L_MTRX.adl

and modified the overview screens,
    /opt/rtcds/userapps/release/sus/common/medm/quad/
        SUS_CUST_QUAD_OVERVIEW.adl
        SUS_CUST_QUAD_ITM_OVERVIEW.adl

If LLO wants these changes to begin prototyping this sort of decoupling as well, I can draft the ECR. 
Install instructions:
(1) save your spot position A2L gains ahead of time, and any filters you've had in the L2_DRIVALIGN_${A}2L banks, since these are now split in to the two new L2_DRIVALIGN_${A}2L_MECH and L2_DRIVALIGN_${A}2L_SPOT banks.
(2) svn up the above folders, 
(3) recompile, install, and restart all QUAD models. 
(4) turn OFF the inputs to the new $(A)2L_SPOT and $(A)2L_MECH filter banks
(5) load a 1.0 in to the new $(A)2L MTRX _2_1 elements
(6) restore the spot position gains in the ${A}2L_SPOT banks, and if you did have any frequency dependent A2L filters, load them in to the ${A}2L_MECH bank. 
(7) turn ON the inputs to the $(A)2L_SPOT banks.

The 4th attached MEDM screenshot shows the configuration in which LHO is currently running -- i.e. with NO L2$(A) gains or filters, so there was no need to install any non-zero elements in the new $(A)2L matrices.

Ops:  We are in the process of Spring Cleaning on the OBSERV.snap SDF files in order to bring decommissioned settings back into the SDF Monitoring (since they are no longer being manipulated by Guardian).  Because of this we are now Monitoring more channels.  So, please continue to take a snapshot of SDF diffs you encounter when transitioning to OBSERVE and post to the log.  This work is happening across all SDF subsystems.

TITLE: 06/11 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    Wind: 14mph Gusts, 10mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.09 μm/s
QUICK SUMMARY: lock, Commissioning

• 23:11 UTC - Kyle back from Mid-X/Mid-Y

TITLE: 06/11 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Unknown
INCOMING OPERATOR: Cheryl
SHIFT SUMMARY:

Maintenance Day included recovery from the SUS computer crash earlier this morning.  After Maintenance & some initial_alignment pains went for locking.  We were running into ASC issues for DRMI and other steps.  Sounds like the issue here are that our spots for higher power (37W) don't quite mesh with spots obtained during Initial Alignment.  Jenne/Sheila are working on this (as we are in the ENGAGE_ASC_FOR_FULL_IFO state.
LOG:

• 15:00 Forklift of chiller (Jeff B)
• 15:00 - 16:50 Oplev centering: end stations (EX completed while H1 was locked, EY), & then ITMx
  • Ed swept EY
• 15:00 Karen out to end station, Vanessa to lvea
• 15:00-16:15 Marc balluns work near HAM6
• 15:02 SC_OFF_NOBRSxy
• 15:25-17:16 PCal maintenance at EX (Niko, Dripta, Sundae, Laurence....Rick+NIST later?)
  • Niko swept EX 
• 15:33 Lockloss
• 15:45 Fire Dept here for hydrant testing (Dave bypassing alarm for few hours).
• 15:45 Due to SUS computer issue, could not run a real DOWN.  Executed ISC_LOCK down-script by hand as much as possible to get H1 to a "down" state for Maintenance
  • Will need to run a "real" DOWN at end of Maintenance 
• 16:20 Out to get TMS optics (Betsy)
• 16:07 Restarting tcs co2 power guardian nodes (TJ)
• 16:13 - 19:15 HAM1/2 + CER Baluns work (Dick, Marc)
• 16:18-17:40 ETMy charge (Rahul)
• 16:27 - 20:30 HAM6 Squeezer work (Sheila)
• 16:28 EX PT-524 LOW Major alarm (it's now at 0!).  Chandra said this could be due to Fire Dept's radio [but don't see them on camera].  She's going to reset.
• 16:48-18:40 HAM5 Romer arm work (Gerardo)
• 16:50 CP1 LN2 fill (norco)
• 16:56-17:56 H2 PSL access investigation (fil)
• 17:19 rick tour 
• 17:21 ETMx Charge (Rahul)
• 17:24 MY cp3 ln2
• 17:45 Restored IMC to LOCKED (Corey)
  • Where MC1, MC3, PR3, & PRM pit/yaw biases time machined to ~5hrs ago (~7:40utc when H1 was in OBSERVING).
• 18:42 MX crane work (Gerardo)
• 18:45 Down script run & began Initial Alignment
• 20:05 FAMIS for DustMon & HEPI fluid at EX & EY (JeffB)
• 20:45 LVEA Swept (TJ)
• 21:00 Ymid visit (Kyle)
• 21:40 OBSERVING!
  • There were a few SDF diffs, but all of them were related to the Squeezer and Sheila was here to address them (there was also an SUSSR3 diff, but this was a significant figure difference).
• 21:52 LOCKLOSS
• 22:49 GRB alert (but we were locking).  Touched base with LLO & Virgo to let them know about the alert (they received alert as well).
• Handing off to Cheryl.

h1sush2a reboot

Jeff K, Corey, Dave:

following this mornings kernel panic of h1sush2a, I isolated this from the Dolphin fabric and rebooted it via the front-panel RESET button.

WP8239 Quad model change

Jeff K, Corey, Dave:

The models h1sus[itmx, itmy, etmx, etmy] were restarted with new models.

DAQ restart

Dave:

DAQ was restarted at 11:23 PDT for the above Quad changes.

(JeffK, TJ, Sheila, Corey)
H1's made it back to OBSERVING at 2:40pm local time.  This was after Mainteance Day activities ended fairly close to noon.

Started with running the ISC_LOCK DOWN state & running an alignment.

Notes On Alignment:

• X-arm green locked up easily and was aligned.  Y-arm green was hard for me to get above 0.7.  JeffK was able to fix the alignment (via ETMy & TMS).
• After X&Y green arms looked OK, Tried the new INIT_ALIGN guardian node (JeffK, TJ).  [NOTE:  this is not yet ready for primetime, so do not use until TJ gives us the OK on it.]
  • Unfortunately this drove off the green X-arm.
  • It does not work for BS (MICH) alignment yet (so paused it and used ALIGN_IFO).
  • Other than the two issues above, they used this new guardian node to align H1 this afternoon.

Notes on Locking:

• PRMI was tweaked up a little, and then selcted NOMINAL_LOW_NOISE, and made it all the way through up to Squeezing.
  • Stuck with LOCKING_OMC state for SQZ_LO_LR.
  • Sheila requested SQZ_READY_IFO for SQZ_MANAGER, 
    • Then selected SQUEEZING
  • This gave us a better signal  for H1:SQZ-OMC_TRANS_RF3_DEMOD_RFMON (previouslyit was at -40, but went up to its normal -20 after requesting SQZ_READY_IFO & SQUEEZING.

Promptly took H1 to OBSERVING, but unfortunately it only stayed in OBSERVING for a dozen minutes.  

   Checked the dust monitor vacuum pumps and the HEPI pump stations at both ends and the corner station.
 
   Dust Monitor Vacuum Pumps - Made slight adjustments in the vacuum pressure on all three pumps. The temperatures, while all were within specifications, they were a bit high at End-X. The pump housing and exhaust temps were a few degrees above 150f. This is not an issue, but will be if the temps continue to rise. Will watch for a trend developing. 

   HEPI Pump Stations: All three HEPI pump stations fluid levels had not changed since the last check. I noted no leak or drips that Hugh had not all ready flagged and put absorbent pads down. 

   The station levels are:  End-X - 8 9/16", no change from last check
                                        End-Y - 9 0/16". No change from last check
                                        CS - 6 9/16". Up 1/16" from last check. 

   Closing FAMIS #12989.

Pulled the AM-AOM Power Conditioner chassis on the squeezer and adjusted gain resistors on the input stage to the new specification.  Also fixed a part placement error on the board which was attenuating the bias adjustment setting.  This closes WP8238.

I turned off the WAP, but that was all that I found.

Finished with the OPLEV charge measurements for ETMX (only 3 measurements done) and ETMY (all 5 measurements) today during the the maintenance downtime, the plots are attached below. The effective bias voltage for both ETMX and ETMY are within +-40V (except for  ETMY yaw which is slowly inching towards 50 volts, will keep an eye on that in future). The long term trend looks fine.

For the ETMX we were short on time and hence could only perform 3 measurements, as Jeff Kissel had to work on the rearrangement of QUAD L2 DRIVEALIGN matrices. 

All the slider values were restored and SDF differences removed after the measurements were completed.

OpLev centering was done on both ETMS and ITMX. I'm experimenting with compensating the alignments of these to the degrees that they are driven by the loops during an extended NLN lock. I was able to do EX at NLN and get a good 0/0. Unlocked/Aligned I compensated EY with +2u rad in P and +4u rad in Y. ITMX was compensated with +3u rad in P and nothing in Y. Below is a shot of the positions in NLN.

Just got a bunch of SW watchdog tripped notifications and got kicked out of observe, but we are still locked. All of the fields for the large HAM2 suspensions on the CDS overview are white, as well as H1IOPSUSH2A. I've called Dave, he's looking into it.

M. Pirello, D. Gustafson

We installed new v3 Baluns on the following signals in the CER:

ISC-C3(37-1) 40Mhz TCS AOM Return exchanged v1-117 with v3-S002

ISC-C3(33-4) 158.8Mhz Fiber Beat Note Return exchanged v1-193 with v3-S003

ISC-C3(33-5) 79.4Mhz SQZ VCO Return exchanged v1-151 with v3-S004

ISC-C3(33-6) 203.125MHz SQZ VCXO Return exchanged v1-052 with v3-S005

ISC-C4(39-3) 79.4MHz PSL VCO Return exchanged v1-093 with v3-S010

These are all return signals, the impact should be minimal.  Work was completed per WP8150

Balun status can be seen here E1900100.