Ops Day Shift Summary

Title:  06/09/2016, Day Shift 15:00 – 23:00 (08:00 – 16:00) All times in UTC (PT)
State of H1: IFO unlocked. Half day of maintenance. 
Commissioning: Recovering the IFO and working on problems
Outgoing Operator:  None
 
Activity Log: All Times in UTC (PT)

14:45 (07:45) Ken – Working in Upstairs CER
14:47 (07:47) Peter – Taking survey of IO tables in LVEA
14:48 (07:48) Tim Nelson on site – to see Bubba
15:01 (08:01) Krishna & Mike – Going to End-X to work on BRS
15:21 (08:21) Gerardo – Going to End-Y Compressor room to work on IP11 wiring
16:04 (09:04) Bubba & Tim – Going into LVEA for facilities inspection
16:05 (09:05) Gerardo – Back from End-Y
16:07 (09:07) Electrical parts delivery for Richard – Dropped off at the LVEA rollup door
16:15 (09:15) Krishna & Mike – Back from End-X
16:16 (09:16) Bubba & Tim – Finished in the LVEA
16:17 (09:17) Kyle – Going to Mid-X to take measurements
16:18 (09:18) Filiberto & Gerardo – Going to End-X to work on Binary IO (WP #5925)
16:25 (09:25) Bubba & Tim – Going to End-X for facilities inspection
16:30 (09:30) Jason & Ed – Going into the PSL enclosure to work on DBB alignment
16:54 (09:54) TJ & Jim – Starting new Guardian nodes for both end stations (WP #5907)
16:56 (09:56) Kyle – Back from Mid-X
17:00 (10:00) Filiberto & Gerardo – Back from End-X
17:20 (10:20) Christina – Forklifting wood creates from mechanical building to staging building
17:27 (10:27) Bubba & Tim – Finished at End-X – Going to End-Y
17:38 (10:38) Haocun – Taking a tour through the LVEA
17:50 (10:50) Kyle – Going into the LVEA to get a helium tank
17:58 (10:58) Bubba & Tim – Finished at End-Y
18:00 (11:00) Haocun – Out of LVEA
18:15 (11:15) Sheila, Haocun, & Filiberto going to Mid-Y to get some boards
18:27 (11:27) Bubba & Tim – Going into the CER for facilities inspection  
18:34 (11:34) TJ & Jim – Finished with Guardian work
18:35 (11:35) Jason & Ed – Out of PSL
18:40 (11:40) Karen – Cleaning in the H2 building
19:00 (12:00) Sheila, Haocun, & Filiberto – Back from Mid-Y
19:05 (12:05) Karen – Out of the H2 building
19:14 (12:14) Cheryl – Going into Squeezer Bay to look for parts
19:49 (12:49) Carlos – Going into MSR to take inventory
19:51 (12:51) Cheryl – Out of the LVEA
20:00 (13:00) Start alignment and locking after maintenance window
20:09 (13:09) Dave – Restarting all PI models and the DAQ
23:00 (16:00) Turn over to Travis

End of Shift Summary:

Title: 06/09/2016, Day Shift 15:00 – 23:00 (08:00 – 16:00) All times in UTC (PT)
Support: Evan, Sheila
Incoming Operator: Travis

Shift Detail Summary: Adjust Y-Arm Fiber polarization from 16.5% to 6.0%.   
After half plus maintenance day, working on recovering the IFO. Considerable work was needed to get the IFO back into a functional alignment. That completed, the IFO is locking up to ENGAGE_SOFT_LOOPS. There is still a problem getting through REFL_IN_VACUO. Sheila and Evan are working on this problem. 

Y-End IP11 Signal Cable for Controller Fixed

The wires that were off the connector for the IP11 signal cable were fixed today, IP11 is back on and running without problems.

Optical Lever - Oplev - 7 day trends

I zoomed in on where the oplev signal was before the outage, and where it is now.

Destroyed TCS_ITMX GRD Node

While I was checking through the list of running nodes, I noticed that there were a total of 5 TCS nodes. It seems that the old TCS_ITMX diagnostic node was still running, but no one knew since it was not on the overview or anywhere else. Since the newer TCS_ITMX_CO2 node has replaced this one, I destroyed the node after confirming with Nutsinee.

New Coner Station SEI Configuration nodes

Added new SEI configuration Guardian nodes to all of the corner station chambers except HAM1 (soon). For the CS BSCs the code is almost identical to what is ran at the end stations, but with the BRS checks removed. The HAM config nodes are a bit different, as they do not change the blends, only sensor correction.

In the near future there will be a SEI configuration manager that can change all of the chamber configurations at once. This will let us prep the IFO for incoming earthquakes or change the configuration for different environments.

Updated Guardian Overview shot attached.

WP#5907

nds target jobs directory auto clean-up restarted

The hourly cronjob which keeps the nds jobs directory from overfilling was started on h1fs0 (moved from h1boot). Details at:

https://lhocds.ligo-wa.caltech.edu/wiki/CleanupNdsJobsDirectory

New PI code installed, DAQ restarted

Tega, Dave:

New code for h1omcpi, h1susitmpi, h1susetmxpi and h1susetmypi. Slow channels were modified, therefore a DAQ restart was needed.

The DAQ restart also caught the recent changes to Guardian (new nodes) and HWS (removed heartbeat from ETMY).

The DAQ EDCU is now GREEN again.

PSL Modescan DBB report

Attached is a mdoescan of the DBB HPO path after some alignment attempts were made. It seems that TEM01/10 modes seems to be within reasonable values. Vertical alignment into the PMC seems to be slightly better than reference. Horizontal was marginally worse yet locking of the PMC was still not possible.

Sei siesmometer mass check - Monthly FAMIS #6075

PI: Driving ITMX modes with newly installed LVLN ESD

Carl, Terra, Ross, Tega

Tonight we used the freshly installed LVLN ITMX ESD driver to ring up and damp two mechanical modes of ITMX, 15063 Hz and 15077 Hz. 

After sorting out some phase settings, we drove the ITMX ESD close to saturation in a differential drumhead pattern. Negative gain rang up 15063 Hz. Flipping the gain sign to postive then damped this mode and rang up 15077 Hz. The amplitude plateaued as a the saturated drive signal approched a square wave. Figure below tracks amplitude of 15063 Hz and 15077 Hz (seen in OMC trans), with gain sign flip occuring around the 0.15 time mark. 

Also attached is a spectrum of H1:OMC-PI_DCPD_64KHZ_A_DQ during no gain, negative gain, and positive gain times, i.e. on either side of the 0.15 time mark from the plot above. 

At about 0.23 hours the gain was turned off and the mode rangdown.  The fit to this ringdown indicates the mode has a Q factor of (omega_o)/(2alpha) = 1.2 million.  

Settings: Power 1.9 W, DC bias 100k, butterworth BP filter, iWave bypassed, -60deg damp filter, damp gain 300,000. 

Such a wonderful conclusion to the installation and commissioning of this system.  Much thanks for the great support I received from all involved.

I suspect that 15077 Hz mode is an aliased 48923 Hz mechanical mode (64 - 15.077) kHz. The FEA gives an interesting mode at 48944 Hz (mode shape attached). Observation of the analog channel PSD on transmission is required to confirm if this is a case. The 15077 Hz mode is only 14 Hz above known  15063 Hz mode. I am not very familiar with linetracking filter but I assume that the two resonant lines 15063 HZ and 15077 Hz cannot be sufficiently separated and the signal with higher resonant peak will be eventuality phase-locked. It may be interesting to observe the transition from one mode to another.  
If this all is true you measured the Q-factor of one of the modes in the range were PI may also show up at higher circulating power than during O1.
It looks to me that the 48923 Hz mode is very sensitive to off-center position of optical TEM00 (that's probably why can be seen on OMC) and can be used for centering of TEM00 on ITMs.   

OPS Eve Shift Summary

TITLE: 06/09 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
INCOMING OPERATOR: None
SHIFT SUMMARY:  IT"S ALIVE.  We were able to get to DC Readout tonight for the first time since the power outage without too much problem.  Commissioning for most of the night.
LOG:

4:36 Turned off Sensor Correction using Jim's new button in anticipation of the arrival of a 6.2 EQ in Indonesia.
 

BRSX Damper Upgrade in Progress

Michael, Krishna

We made a lot of progress on the BRSX upgrades today.

The new belt driven turntable was installed which is designed to have less vibrations during damping. The previous turntable used gears and a loud stepper motor which caused vibrations which in turn drove up modes of the balance. (see 26265) The new turntable uses a belt and a much quieter Bekchoff stepper motor which has noticably less vibrations. Also, the Mightex camera, a 2048 pixel CCD read over USB, was replaced with a Basler camera which has 4096 pixels and is read over ethernet. This new camera will remove the USB communication error which was causing the system to crash every couple weeks.

Additionally, we replaced the laptop and NI DAQ card with a Beckhoff computer and electronics. Both the C# code, which turns images into angles, and the PLC code, which controls the damper and sends data out, are working and data is being sent out to the seismic front ends. However, the EPICS communication has yet to be set up so many of the diagnostic channels are not being read.

The balance is rung up to a very large amplitude due to the work today but we've begun to slowly damp it down with the new turntable.

Damp setting for violin mode 505.710

ETMX Mode3: FM1, FM2, FM4,  +10 gain (BP, -60deg, 100dB) seems to have worked quite well. No need to turn on a damping for 505.707 (which should be checked again with 0.0001 BW to see if it's really exists). 505.707 should be watched while damping 505.710 just in case.

The new violin mode table is being uplated slowly. The modes with Damp Setting column filled out are the one that's been sucessfully damped by the filter settings indicated in the table.

Oscillation on ETMX ESD Driver

Terra, Carl B., Rich

Terra and Carl had noticed a ~20mVp-p 1.3MHz oscillation on the ETMX ESD Driver at viewed with an oscilloscope at the output (SHV connectors on the front panel) leading to the ETM.  After confirming that the oscillation was really generated by the ESD Driver, Carl and I opened the spare to see if we could find a set of conditions that might produce such an oscillation.  By examining the spare, we were able to trace the potential instability to the first stage of the two stage pole-zero dewhitening filter.  Poking at this stage with my finger will occasionally get it to latch into the 1.3MHz oscillation state.  We drove the output of the opamp in question with a 1vp-p, 1kHz square wave through 400 ohms to get a better feel for the dampling and phase margin under normal operating conditions.  This stage is completely stable with the pole-zero stage engaged, but becomes marginally stable with the pole-zero stage bypassed.  The problem can be cured by the addition of a small (~30pf) capacitor across the feedback 21kohm resistor implying it is worsened by input capacitance.

We opted not to pull all the drivers and fix this problem.  The reasoning is that this stage is in its stable state (pole-zero engaged) while the driver is used as a low noise driver for length control of the ETM.  There is really no driving need to fix this at this point, but we wanted to document its existence for optional repair at a later date.  A fault report will be written to further document the issue.  

Added to FRS https://services.ligo-la.caltech.edu/FRS/show_bug.cgi?id=5675

H1 ITMX ISI Stage1 V1 CPS Still Noisy

As I reported in 27622, the elevated noise is still present in the Stage1 V1 CPS of the ITMX.  We should try a power cycle of the chassis at earliest opportunity.  I don't have access to DetChar at the moment to see if this noise is impacting the ISI performance.

H1 SUS ITM LV ESD Driver Installed and Functional

J. Kissel, R. Abbott, T. Hardwick, C. Blair, D. Barker, and J. Betzwieser

After a good bit of chasing our tails and simulink model juggling, we've confirmed that the new infrastructure necessary for the new ITM ESD drivers (see E1600064) is ready to go. 

I'll post more details and screens later, but below are a summary of the things we'd touched during the day's installation:
- Several top-level models are affected by this change, 
/opt/rtcds/userapps/release/sus/h1/models
h1susauxb123.mdl   <-- for the new voltage monitor channels
h1susbs.mdl        <-- in charge of distributing the BIO signals
h1susitmx.mdl      <-- integration into the control system
h1susitmy.mdl      <-- integration into the control system

- We also, sadly needed to create a new QUAD library part, because the ITM ESD driver infrastructure is that much different from the ETM ESD driver system; that now lives here: 
/opt/rtcds/userapps/release/sus/common/models/QUAD_ITM_MASTER.mdl

and in addition, we added a new function to the 
/opt/rtcds/userapps/release/sus/common/src/
CD_STATE_MACHINE.c

called "ESD_ITM" which is called in the BIO block of the new QUAD library part. 
- Also, in the clean up of models, we also re-installed all DAC cards directly from the CDS_PARTS library, which means that a few of the MEDM macro descriptions needed updating -- plus the new macros for the ITM ESD drivers themselves. Those are in 
/opt/rtcds/userapps/release/sus/common/medm
susitmx_overview_macro.txt
susitmy_overview_macro.txt

- Both the new BIO block and QUAD Library parts needed associated entirely new MEDM screens which are now separate offshoots of the ETMs, 
/opt/rtcds/userapps/release/sus/common/medm/quad/
SUS_CUST_QUAD_ITM_OVERVIEW.adl
SUS_CUST_QUAD_ITM_BIO.adl

- I updated the sitemap to call these new SUS_CUST_QUAD_ITM_OVERVIEW screens, passing the appropriate macro files for each optic. The sitemap has been committed here: 
/opt/rtcds/userapps/release/cds/h1/medm/
SITEMAP.adl

More details about this install can be found in G1601304.