J. Kissel, D. Tuyenbayev

We've grabbed another set of calibration measurements of the IFO's sensing function in order to build confidence in our newly commissioned front-end tracking of time dependent model parameters, and to confirm the discrepancy seen yesterday (LHO aLOG 30391) was not something funny about that lock stretch. Indeed the discrepancy remains.

We've found bugs in our code that compares our DARM model against these measurements, so we can't yet confirm exact numbers like optical gain, DARM coupled cavity pole frequency, or SRC detuning spring frequency to offer a proposed change to the CAL-CS front-end parameters to fix it. We'll hopefully have something by tomorrow.

Attached are screenshots of the measurements and the DARM loop parameters during the measurement. 

Timeline: (in UTC)
2016-10-12
01:30:00 -- IFO in stable Nominal Low Noise (PCALY calibration lines are ON); IFO undisturbed
01:46:00 -- IFO sufficiently thermalized to start measurements; PCALY lines turned OFF
01:47:48 -- PCAL2DARM measurement begins
02:05:48 -- DARM OLGTF measurement begins
02:24:00 -- measurements done; PCALY lines turned back ON; IFO undisturbed
02:40:00 -- Official Undisturbed period ends (but no one has done anything with the IFO since, up to 03:06 UTC)

Data files (which are exported and committed to the SVN):
/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/PreER10/H1/Measurements/
DARMOLGTFs/2016-10-12_H1_DARM_OLGTF_4to1200Hz.xml
PCAL/2016-10-12_H1_PCAL2DARMTF_4to1200Hz.xml

J. Kissel

I've used Kiwamu's templates (LHO aLOG 29860) to gather new DARM OLG and PCAL2DARM transfer functions, to help increase the number of data points for darm coupled cavity pole and SRC detuning spring frequencies. In doing so, I've found that PCAL suggests that CAL-DELTAL_EXTERNAL is wrong low by ~20% above 50 Hz, in a frequency dependent fashion (confirmed by the phase and ridiculously high coherence). 

We will analyze the data in-full, and report what the measured pole and spring frequencies are in the morning. We'll also show trends of calibration line heights, such that eventually we can confirm the frequencies over time.

This frequency dependent error in CAL-DELTAL_EXTERNAL may be because the DARM coupled cavity pole frequency programmed into the CAL CS fron end is 342 Hz, and that's just not correct for this lock stretch. We have to turn OFF the PCALY calibration lines during the measurement due to range issues, but the front end calculation of the DARM cavity pole, after the measurement, suggests anywhere for 315 Hz to 340 Hz. Unclear whether we can trust the online calculation just yet, so we're leaving the IFO alone for ~30 minutes after the measurement to be able to confirm offline later.

Recall that we're still not controlling the cavity waist angle/translation of the SRC entirely: the SRC1 loop (nominally controlling SRM alone) is OFF, but the SRC2 loop (controlling SRM and SR2) is ON.

Undisturbed time post-sweeps:
Start    Oct 11 2016 02:36:00 UTC   Oct 10 2016 19:36:00 PDT  1160188577
Stop     Oct 11 2016 03:07:00 UTC   Oct 10 2016 20:07:00 PDT  1160190437
 
The new measurements have not yet been exported, but have been committed to the CalSVN here:
/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/PreER10/H1/Measurements/
DARMOLGTFs/2016-10-10_H1_DARM_OLGTF_4to1200Hz.xml
PCAL/2016-10-10_H1_PCAL2DARMTF_4to1200Hz.xml


EDIT: I've added two screenshots showing the digital settings relevant to the DARM loop parameters. Unfortunately, the production conlog is down for maintenance/upgrades, but thankfully Patrick setup a test bed a few nights ago (goto http://conlog-test-replica/), I was able to pull the list of channels I needed. FAlso for the record, some of those channels have changed since O1, so I quote the new list here for easier copy and paste in the future: 
H1:LSC-DARM1_SWSTAT
H1:LSC-DARM1_GAIN
H1:LSC-DARM2_SWSTAT
H1:LSC-DARM2_GAIN
H1:SUS-ETMY_L1_LOCK_L_SWSTAT
H1:SUS-ETMY_L1_LOCK_L_GAIN
H1:SUS-ETMY_L1_DRIVEALIGN_L2L_SWSTAT
H1:SUS-ETMY_L1_DRIVEALIGN_L2L_GAIN
H1:SUS-ETMY_L2_LOCK_L_SWSTAT
H1:SUS-ETMY_L2_LOCK_L_GAIN
H1:SUS-ETMY_L2_DRIVEALIGN_L2L_SWSTAT
H1:SUS-ETMY_L2_DRIVEALIGN_L2L_GAIN
H1:SUS-ETMY_L3_ISCINF_L_SWSTAT
H1:SUS-ETMY_L3_ISCINF_L_GAIN
H1:SUS-ETMY_L3_LOCK_L_SWSTAT
H1:SUS-ETMY_L3_LOCK_L_GAIN
H1:SUS-ETMY_L3_DRIVEALIGN_L2L_SWSTAT
H1:SUS-ETMY_L3_DRIVEALIGN_L2L_GAIN
H1:SUS-ETMY_L3_LOCK_INBIAS
H1:SUS-ETMY_L3_ESDOUTF_LIN_BYPASS_SW
H1:SUS-ETMY_L3_ESDOUTF_LIN_FORCE_COEFF
H1:SUS-ETMY_BIO_M0_STATEREQ
H1:SUS-ETMY_BIO_L1_STATEREQ
H1:SUS-ETMY_BIO_L2_UL_STATEREQ
H1:SUS-ETMY_BIO_L2_LL_STATEREQ
H1:SUS-ETMY_BIO_L2_UR_STATEREQ
H1:SUS-ETMY_BIO_L2_LR_STATEREQ
H1:SUS-ETMY_BIO_L3_UL_STATEREQ
H1:SUS-ETMY_BIO_L3_UR_STATEREQ
H1:SUS-ETMY_BIO_L3_LL_STATEREQ
H1:SUS-ETMY_BIO_L3_LR_STATEREQ

WP6232 Upgrade frame writers

Jonathan, Jim B, Dave:

h1fw2 was running with close to the new code, it was upgraded to add the md5 filename change only. Quickly following h1fw0 and h1fw1 were upgraded to the latest code. I am updating the DAQ MEDM to show the new diagnostic md5 check sum data.

WP6217 ISI frontend code upgrade

Hugh, Jim B

All ISI models were restarted with new code

WP6227 HEPI frontend code upgrade

Hugh, Jim B

All HEPI models were restarted with new code.

WP6235 PSL-DBB jitter feed-forward to LSC

Daniel, Gabrielle, Dave:

New code on the h1psldbb exports the jitter signal as a 64kHz Dolphin channel. The h1lsc model uses this feed-forward data. Change added a 16kHz LSC DQ channel to the commissioning frame.

WP6242 Migration of virtual machines to proxmox

Carlos

Old vmware virtual hosts were migrated to the new Proxmox system.

WP6236 SUS ITMX.ETMX model changes for HWWD install

Fil, Richard, Jim B, Dave

sister wp to 6234. The ITMX and ETMX hardware watchdogs were install. The h1susitmx, h1susetmx models were modified to read the HWWD status via the binary input feed from these chassis. Since we are not controlling these units, I did not put in the binary output logic.

WP6229 h1tcscs model change for SIM parts

Kiwamu, Dave

A new h1tcscs model was installed. We verified that the TCS CO2 chillers behaved correctly on loss of temperature control voltage.

WP6231 GDS-DMT upgrade

team-GDS

Code was upgraded, no impact was seen from the control room

WP6239 PSL-ISS model change

Daniel, Dave

New h1psliss model was installed. This was done at the same time as the h1psldbb change.

WP6240 Beckhoff Slow Controls change

Daniel, Dave

Daniel installed new PLC code. I updated the DAQ INI files, the target autoBurt.req files and the Beckhoff SDF monitor files.

WP6238 CAL-CS model change

Darkhan, Jeff K, Dave

a new h1calcs model was installed.

DAQ restarts

Dave:

The DAQ was restarted several times today to support the above work.

(note we did not get to removing h1ldasgw2 WP#6237, will defer this to later in the week)

LP_v_H4 shows the laser output power and the head 4 flow rate.  At this point in time the flow rate trip
0.2 lpm.  The drop in laser power seems to coincide with the increase in flow rate.

XC_v_H4 shows the output of the crystal chiller and the head 4 flow rate.  The chiller clearly switches
off after the spike in the head 4 flow rate.

InletP_v_H4 shows the inlet pressure versus head 4 flow rate.  The oscillations in pressure take place
after the spike in the flow rate.  The same is true for the outlet pressure.

    The sudden increase in the flow rate perhaps suggests that something in the flow sensor may have
been dislodged but I (PK) would expect that the flow rate would not drop to zero but to some other
non-zero value.  Unless there was a following object that promptly jammed things up.  But things started
up okay for the subsequent startup.

    The various filters in the system are clean from a visual inspection.




  Jason/Peter

details in alog 30410

Attached are plots of the cooling related signals from around the time of the laser trip on ~midday Sunday.
The minimum head flow rate was set to be 0.5 lpm as a precaution because the front end and power meter circuit
flow meters were disabled.

    From the XChilFlow_v_Head4 plot it looks like the flow rate in head 4 was down on its way beyond 0.5 lpm
and then the crystal chiller shutdown, as it was supposed.  The plots {In,Out}letPressure_v_Head4Flow show the
pressures in the water manifold at the same time.  The pressure oscillations occur as the chiller was shutting
down and not before it.

    XChil_v_H4, {In,Out}P_v_H4 are plots for the Sunday afternoon laser trip. Again consistent with the flow
rate in head 4 dipping below the trip threshold.

Removed check valve from CP4 exhaust and installed a thermocouple up inside the pipe several feet. Signal is being read out via H0:VAC-MY_CP4_TE252B_DISCHARGE_TEMP_DEGC. 

Tomorrow I'll overfill CP4 and collect temp data.

Kiwamu Daniel

With ISS PD A mounted in the main path we measured the spectrum of the second loop ISS. The attached plot shows a clear improvement in the signal sent to the inner loop ISS. The red curve is a representation of the new control signal, whereas the dark red curve is representing the old configuration. The second loop out-of-loop sensor also sees improvements (black against gray) between 600 Hz and 4 kHz. The jitter out of the HPO is unchanged. The measurements were done at 54W into the IMC.

WP 6234
FRS 4504

Installed D1300642 HWWD electronics for ITMX and ETMX. Units installed in monitor-only mode.

1. Units were powered up
2. DB37 cables connected
3. DB9 cable connected from HWWD chassis to binary input chassis
4. Three BNC cables were pulled to SEI ISI coil drivers

ISI coil drivers need to be replaced with modified units that will enable the HWWD electronics to power off the coil drivers.

Serial numbers of units installed.
ITMX - S1500333
EX - S1301706

Peter, Kiwamu,

We have taken out the PD A photodiode out of the ISS inner loop box and placed it at a location where the PWR_EOM photodiode was. We confirmed that we can close the loop with the moved PD A.

[New setup]

We opened up the inner loop box and removed the base plate on which the two photodiodes sat. Then we took out only PD A from the base plate while leaving PD B mounted on the base plate. We put the base plate back into the inner loop box. A black glass beam dump was placed at the location where PD A used to be. Careful: because we could not find a good screw hole, we could not clamp down the black glass beam dump which is currently just sitting on the base plate.

We placed PD A to the location where PWR EOM (Thoralbs PDA55) had been. We rerouted all the associated cables for PD A (a 5 pin lemo, 2 normal lemos) to the new location. We measured the beam power at this location to be 8 mW. Because this is too much for PD A (which we think typically runs with 1 mW), we installed an ND filter on the front panel of PD A (see the picture).

A few more pictures are available at ResourceSpace.

[ISS loop closed with PD A]

Here shows a screenshot of the setup for closing the inner loop with PD A. The gain slider needed to be a 12 dB higher (which still smells like a factor of two calibration error...) than the usual. The ref signal for PD A needed to be -0.46.

Intend to confirm that CP3 isn't overfilling following today's delivery via observing absence of vapor at exhaust at some point before leaving today (It's similar to a sentence - only without all of the unnecessary comprehension!)

State of H1:  in Maintenance, 18 Work Permits in progress / done

Activities: (Corey 8:00-10:38(15:00-17:38UTC))

• 8:00 LVEA Cleaning (Christina, Karen)
• 8:16 Transitioned EX & EY ISIs to "VERY_WINDY_NOBRSXY" in prep for Maintenance
• 8:22 EY to LASER HAZARD
• 8:22 PCal EY work (Travis/Pcal Crew)
• 8:25 Turbo pump controllers energizing (charge batteries), maintenance (Kyle)
• 8:43 -11? EY Vent/Purch air skid work (WP6241)  (Kyle & gerardo)
• 8:33-8:50 COMPUTERS FROZE!  (Batch & Richard looking?)
• 8:45 Cleanroom curtains, HAM3/4 (Jeff)
• 8:48 Contractor for mats
• 9:09 SEI model work (Hugh, 6217, 6227)
• 9:00 PSL (Daniel, WP6239)
• 9:14 PSL Room work (Peter, Kiwamu)
• 9:40 LN Truck at CP5 & CP3
• 9:40 Gate Valve Measurements (Chandra)
• 9:52 King Soft for RO work (Bubba)
• 9:45 Check PSL DBB shutter (Richard)
• 10:11 Paradise Water 
• 10:16 quick PSL ODC work (Jason)
• 10:08:  TCSx CO2 laser & Xand Y Chiller alarms---not sure why???  (Daniel & Jason checking)----> Jason brought back 
• 10:38 DAQ Restart

As of 18:00UTC (11:00PT) Work in progress: (Cheryl)

•  1  6234         LVEA/EX    filiberto.EE                    hardware WD elec                 x202   00:00:36
•  2  6228         EY     travis.pcal                           PCal work                 x239   00:02:09
•  3  6241         EY            kyle                 vent purge air work                 x239   00:00:14
•  4   n/a            PSL    peter.kiwamu                       PSL room work                 x113   00:00:53
•  5  6232         CDS        jonathan                    framewriter work                 x202   00:02:36
•  6   n/a            MY    liquid.nitro                            CP5 fill                 x202   00:00:38
•  7   n/a            LVEA  jason.oberling       check TCSx laser and chillers                 x202   00:00:56
•  8  6236         LVEA     dave.barker                         SUS WD work                 x202   00:01:16
•  9  6238         LVEA    dave.darkhan                        CALCS update                 x202   00:01:17
• 10  6234       EY/EX    filiberto.EE                    hardware WD elec                 x202   00:02:19
• 11   n/a          MY    liquid.nitro                            CP3 fill                 x202   00:01:23
• 12  6239        PSL-ISS           DB+DS            psliss code, DAQ restart                  255   00:03:29
• 13  6235        PSLDBB-LSC           DB+DS    dbb and lsc restart, daq restart                  255   00:03:30
• 14  6240        DAQ           DB+DS    restart DAQ for Beckhoff changes                  255   00:03:31
• 15  6231        DMT-GDS           JohnZ                     upgrade GDS DMT                  255   00:03:34
• 16  0000        lvea           bubba                                3ifo                  202   00:01:44
• 17  0000        lvea     betsy-jason                     tcsy-water-leak                  202   00:01:57
• 18  0000        lvea    richard-mike                  check-voltage-popA                  202   00:01:57

Activities Since (UTC):

• 18:37 - 6229 cds dave-kiwamu tcs-code-upgrade - done
• 18:40 - 6239 cds dave-daniel ISS-code-upgrade - done
• 18:42 - 6244 cds richard-mike popx-whitening-test-swap - no swap, connection/cable
• 19:13 - 6231 DMT-GDS JohnZ upgrade GDS DMT - done
• 19:13 - VAC - Gerardo - pimps in LVEA turned off
• 19:18 - 6241  EY kyle vent purge air work - done
• 19:21 - 6242 cds carlos migrate-software - done
• 19:21 - 6244 cds richard-mike popx-whitening-test-swap - hardware is done for now, handing back to Daniel
• 19:44 - REFL - Daniel - check signals
• 19:45 - 6234 EY/EX filiberto.EE hardware WD elec - done
• 19:47 - 6236 LVEA dave.barker SUS WD work - done
• 19:49 - LVEA  jason.oberling check TCSx laser and chillers - done
• 19:49 - lvea  betsy-jason tcsy-water-leak - done
• 20:00 - DAQ restart
• 20:00 - 6244 cds richard-mike popx-hardware - back out
• 20:07 - DAQ restart
• 20:14 - 6239 psl kiwamu measure-iss-loop - done
• 20:14 - lvea daniel refl - back
• 20:24 - lvea daniel refl

Work that continues:

•  REFL - Daniel - LVEA
•  Pcal - Rick/Travis - EY

J. Betzwieser, D. Barker, D. Tuyenbayev,

Overview

Updated the h1calcs model to include modifications from LLO, restarted the DAQ system (LHO WP #6238). Now H1 and L1 are running the same version of the CAL-CS model.

Details

• CTRL_DELAY filter bank was added to the DELTAL_CTRL signal path, before the summation with DELTAL_RESIDUAL (see LLO alog 28268).
• Reverted some modifications to BUFFER_AND_AVERAGE.c, currently using version of the script in CDS SVN r14393 (see LHO alog 30293).

After the DAQ restart the coherence calculation settings were changed to:

Number of averages: H1:CAL-CS_TDEP_COH_BUFFER_SIZE 13
Seconds between averages: H1:CAL-CS_TDEP_COH_STRIDE 10

The new CTRL_DELAYfilter is currently empty (unused), and the DELAY_CYCLES (ring buffer / integer delay cycles) is set to 7.

The synchronized oscillators in the CAL-CS time-dependent parameter and coherence calculations were restarted manually. This is a necessary step to get correct phases in the oscillators after a model restart (a bug is described in LHO alog 30220).

ECR E1600042 WP 6217; ECR E1500325 WP 6227

To Remove DACKILL elements from HAM ISIs and HEPIs:

HAM ISI

.) Removed DACKILL Widgets on WD Block--Attachment 1.

.) Removed DACKILL link from WD Block to the ERRMON Block--Attachment 2.

.) Routed WD_STATE from WD Block to ERRMON--Attachment 2.

.) Added WD_STATE Logic in ERRMON Block for Rogue Excitation Evaluation--Attachment 3.

HEPI

.) Removed DACKILL elements from HEPI (Top) Level--Attachment 4.

.) Removed DACKILL parts  on WD Block--like ISI Attachment 1.

To update HEPIs to Bleedoff-Accumulated-Saturations feature running on ISIs for months:

.) Add WINDOWTIME inputs on HEPI WD Block--Attachment 5.

.) Removed Test Point pickoffs WD Flag channels--also on Attachment 5.

.) Replace model saturation counter on WD/IPS, L4C & ACT Blocks with WD_SATCOUNT_vb.c counter & bleedoff Function--Attachment 6 becomes Attachment 7, e.g.

JimB restarted all these models after the build and install.  Reisolation was not a problem.  HAM2 did have one trip on CPS during 1st isolation attempt but it worked fine on the 2nd...

SVN COMMITS:

/opt/rtcds/userapps/release/isi/common/models/

hugh.radkins@opsws1:models 0$ svn commit -m "Removed DACKILL remenants & wired WD_STATE to ERRMON"
Sending        models/isihammaster.mdl
Transmitting file data .
Committed revision 14424.

/opt/rtcds/userapps/release/hpi/common/models

hugh.radkins@opsws1:models 0$ svn commit -m "Added sensor/actuator WD Saturation Bleedoff ala ISI & removed Test Point WD Flag channels"
Sending        models/hepitemplate.mdl
Transmitting file data .
Committed revision 14425.
 

Still have some medm and SDF cleanup to do.  In progress.

WP 6229,

I have updated the TCS corner station model (h1tcscs.mdl). I confirmed that the model comiples without an error. The model is ready for installation tomorrow. The model change includes the followings.

• New simulated plant (T1600451-v2).
• Modification for routiing CO2 power values to the SIM block.

The first item is described in T1600451 in detail. The second point is something we newly implemented today in order to get rid of two paricular ezcaread blocks which had been referencing channels that are in the same front end model. To improve this self-referencing situation, we modified TCS_MASTER.mdl so that the TCS block returns the CO2 power as an output. See the attached screenshot for how we routing the CO2 powers to the SIM block.