TITLE: 07/11 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Commissioning
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
Wind: 9mph Gusts, 7mph 5min avg
Primary useism: 0.02 μm/s
Secondary useism: 0.07 μm/s
QUICK SUMMARY:
13:30 Peter King into the PSL
14:58 Corey taking parts into the LVEA
J. Kissel, D. Barker WP 7704 IIET Ticket 10975 ECR E1800201 Tech Note T1800301 Implementation Design SEI aLOG 1343 As per all the above documentation, I've installed a new control infrastructure path designed for the BSC ISI ST2 GS13s, projected into the basis of the test mass QUAD suspension point's motion, to be fed-forward to the top mass (main chain, M0) OSEM actuators. This is motivated by the coherence seen between these ISI sensors (appropriately projected) and arm cavity control signals (e.g. the ASC DOFs; see LHO aLOG 42751), and the hope to reduce the control bandwidth of the arm cavity control be re-allocating the reduction of motion to the local QUADs. This involved - modifying the top levels of all test mass ISI front-end simulink models, /opt/rtcds/userapps/release/isi/h1/models/ h1isietmx.mdl h1isietmy.mdl h1isiitmx.mdl h1isiitmy.mdl to add IPC senders for pitch (longitudinal was already being broadcast), - modifying the top levels of the test mass QUAD suspension front-end simulink models, /opt/rtcds/userapps/release/sus/h1/models/ h1susetmx.mdl h1susetmy.mdl h1susitmx.mdl h1susitmy.mdl to both add receivers and displace the inputs to the QUAD_ITM or QUAD_MASTER library parts down by two, to account for the new SUSPOINT inputs on those parts, and - modifying the M0 block (and subsequent inputs to it) of the above mentioned /opt/rtcds/userapps/release/sus/common/models/ QUAD_MASTER.mdl QUAD_ITM_MASTER.mdl to include the new frequency-dependent matrix for feed forward filters (ISIFF). While in there, I took the opportunity to clean up the summation of ISC-related signals into a single "ISC SUM" block, instead of what had previously been an ASCSUM block and a couple of cobbled together LSC signals. Screenshots of the various changes are attached below. I also have since added the beginnings of MEDM infrastructure for the filter path to the ETM overview screens (I'll complete the ITMs tomorrow). Screenshots of these changes are below as well. These have been committed to /opt/rtcds/userapps/release/sus/common/medm/quad/ SUS_CUST_QUAD_M0_ISIFF.adl SUS_CUST_QUAD_OVERVIEW.adl I've not yet had the chance to update the SDF system to absorb the new channels / infrastructure. I'll do this once I complete the MEDM screen modifications for the ITMs tomorrow morning. Also, while mucking around with the overview screen, I've - compactified the new abundance of violin mode filters in to a sub-screen (see LHO aLOG 42752, LHO aLOG 39539) /opt/rtcds/userapps/release/sus/common/medm/quad/ SUS_CUST_QUAD_L2_DAMP.adl - fixed a long-standing bug in the M0 (highest) Bounce & Roll mode (frequency) damping filters' input matrix. /opt/rtcds/userapps/release/sus/common/medm/quad/ SUS_CUST_QUAD_M0_DAMP_MATRIX.adl To receive updates at LLO - svn update your MEDM screen infrastructure in the following folder, /opt/rtcds/userapps/release/sus/common/medm/quad/ This should be done first, because of the ol' RCG "feature" that when a new filter bank gets created, it turns on as a pass-though. Which means when you restart all of the models, the SUSPOINT GS13s are being piped straight to the output of the QUAD's DAC -- except for the master switch. So, it's convenient to have a functional MEDM screens to turn off the gains or the outputs or something of this new filter infrastructure before you restore the suspension to nominal damping operation. - svn update the common corner of the suspension models, /opt/rtcds/userapps/release/sus/common/models/ which will import the new QUAD and QUAD ITM MASTER library parts. - svn update the H1 corners of the ISI and SUS repos, such that you have examples of what needs to be done at the top levels of the L1 models, /opt/rtcds/userapps/release/sus/h1/models/ /opt/rtcds/userapps/release/isi/h1/models/ - Update the top level of the isi and sus ?tm? models to add the senders and receivers, respectively of the SUSPOINT pitch (and longitudinal) signals. You'll also need to shift all of the inputs to the main library parts down by two, or else you'll get terrible mis-mapping of signals. - Reconcile your SDF system for the QUADs and associated ISIs - Bring your guardian managers of the QUADs and ISIs to SAFE and (at least) ISI_OFFLINE, respectively. - Compile, install, and restart your models - Turn off the new ISI FF path, before restoring the output of the suspension. - Accept all new channels and changes to the output into the SDF system. - Commission the new FF system at our leisure!
Updates to the ITM QUAD overview screens for adding ISIFF (and compactification of violin mode damping filters) are now complete, and change have been commited to the userapps repo.
JasonO, PeterK, RickS
This morning both Peter and Jason carefully inspected the crystals inside the 35-W amplifier both with and without pump light (Peter also with the amplifier seeded and operating nominally). There were some indications of slight contamination, but no clear evidence of damage or a broken crystal.
This morning, we also found that the 35-W laser from the 3rd ifo. storage (Spare1-1208-7) had an NPRO inside the box that was not placed in the nominal location, i.e. not aligned.
We suspected that the unit that was in the H1 Diode Room (OB2-1207), which had an NPRO inside that was mounted in the nominal location, was aligned. We found this not to be the case after energizing the NPRO and inspecting the beam path. The output beam was clipping on the EOM aperture.
So we divided into two efforts. Jason and Rick working on aligning the NPRO beam through the OB2-1207 MOPA, and Peter working on trying to improve beam quality, while maintaining input power, in the 35-W laser (OBS3-0909) that is currently installed in the H1 PSL (the one with the suspected damage in the 35-W amplifier).
We have completed the alignment of the NPRO beam in OB2-1207, with the following power levels (measured using the small, 10-W thermal head):
Peter's alignment of OBS3-0909 is showing some promise. Adjusting the alignment into the amplifier and the alignment of the pump light into the 4th crystal, the beam quality was significantly improved - as good as it has been in a long time. At 47 amps to all pump diodes, the output power is about 33 W. This effort will continue in the morning.
Details will be appended to the aLog entry.
The crystal faces of the front end amplifier were inspected. No obvious signs of damage
were found by me. What I suspected might have been a fracture in the crystal for head 1
is most likely, in retrospect, a reflection of the bottom edge of the crystal onto the
gold coated cooling mount as seen through the front face of the crystal.
Nothing untoward was noticed about the pump light distribution. The amplifier output
window had a small hazy spot on it. The output window of the front end laser housing had
some particles that were drag wiped off. Attached are images of the pump light spot on
the amplifier housing. Although the image for head 1 (P1.jpg) might suggest that the
pump light is clipped that is only because of the placement of the mirror mount that turns
the beam from the NPRO. The pump light incident onto the crystal is not clipped.
For 35-W "Front End" laser Spare1-1208-7:
133.5 lbs
30” x 30” x 8.5” without handles
Handles add 1.5” to height
For context, attached are a few photos of the internal components of the amplifier in the 35-W "Front End" MOPA (master oscillator power amplifier) laser.
Daniel, Thomas, Stefan
We found that the annulus mask actually shows up despite the fringes. So we count a rough picomotor calibration of 2000cts/cm (the picomotor arrows on the periscope top mirror directly indicate beam motion on the optic.) With that, we moved the beam by 15000cts to the right (7.5cm) and 4000cts up (2cm). The attached movie shows the heating pattern. We still see some fringing, and we suspect the lower right of the beam is clipped on one of the steering mirrors. More work to be done...
We also started a script to do a central heating run over night.
Immediately following the ISI model restart the HAM chamber mangers were cycling through states and giving their subordinates constant commands. The reason for this was that the managers were in the ISI_OFFLINE_HEPI_ON state before the restart, and after the restart the master switch is off. With the master switch off, the manager will run the INIT state to see where it should be to recover, but the INIT state was not really prepared for this situation.
The BSC managers have some code written to handle this situation of HEPI isolated, ISI offline with master switch off, but it doesn't quite do what I would expect. It will wait in the INIT state until the masterswitch is manually turned back on, then it will move through all of the states to get back to ISI_OFFLINE_HEPI_ON. I don't really think this is the best way to do it since it sounds like this has been the normal procedure for restarting models. For now, I basically copied what was in the BSC manager's INIT state into the HAM manager's, but we should think about changing this around in the future and maybe think how we want the SEI Guardian nodes to act on restarts.
I tested this on SEI_HAM2 and then loaded it into the other HAM managers.
Closing FRS11051
WP 7700 addressing ECR-E1800026 w/ FRS ticket 9889. See LIGO-T1800299 for details.
Models rebuilt and installed, (DAQ restart required.) Once all other subsystems ready for restarts, platforms down, models restarted. New channels set to appropriate values, SDF files updated and committed. WP closed.
Details of today's ADC channel changes are shown below. The RCG generated adcListSorted.txt files (old and new) were used to generate this list. (The ADC numbering scheme is the model's ADC part name, not the physical card). "<" is incoming channel, ">" is outgoing channel. Names are missing H1:PEM- prefix.
Accelerometer name changes:
< 1 1 CS_ACC_PSL_PERISCOPE_Y_MON
> 1 1 CS_ACC_PSL_TABLE3_Z_MON
< 1 7 CS_ACC_SQZT6_HOMODYNE_X_MON
> 1 7 CS_ACC_IOT1_IMC_X_MON
< 1 8 CS_ACC_IOT2_IMC_Y_MON
> 1 8 CS_ACC_IOT1_IMC_Y_MON
< 1 9 CS_ACC_LVEAFLOOR_HAM6_Z_MON
> 1 9 CS_ACC_IOT1_IMC_Z_MON
< 1 10 CS_ACC_BEAMTUBE_SRTUBE_X_MON
> 1 10 CS_ACC_IOT2_INPUTOPTICS_Y_MON
< 1 11 CS_ACC_ISCT6_SQZLASER_X_MON
> 1 11 CS_ACC_ISCT6_OMC_X_MON
Adding two ESD voltage monitors. I messed up here, there is a copy-paste error and they are both reading the first ADC channel. This needs to be fixed.
< 3 0 CS_VMON_ITMX_ESDPOWER18_MON
< 3 0 CS_VMON_ITMY_ESDPOWER18_MON
> 3 0 CS_ADC_5_0_2K
Orphaned channel 3 1 because of above mistake.
> 3 1 CS_ADC_5_1_2K
Channels 2-15 are no longer being acquired by DAQ, so they lose their _2K suffix.
< 3 2 CS_ADC_5_2
> 3 2 CS_ADC_5_2_2K
< 3 3 CS_ADC_5_3
> 3 3 CS_ADC_5_3_2K
< 3 4 CS_ADC_5_4
> 3 4 CS_ADC_5_4_2K
< 3 5 CS_ADC_5_5
> 3 5 CS_ADC_5_5_2K
< 3 6 CS_ADC_5_6
> 3 6 CS_ADC_5_6_2K
< 3 7 CS_ADC_5_7
> 3 7 CS_ADC_5_7_2K
< 3 8 CS_ADC_5_8
> 3 8 CS_ADC_5_8_2K
< 3 9 CS_ADC_5_9
> 3 9 CS_ADC_5_9_2K
< 3 10 CS_ADC_5_10
> 3 10 CS_ADC_5_10_2K
< 3 11 CS_ADC_5_11
> 3 11 CS_ADC_5_11_2K
< 3 12 CS_ADC_5_12
> 3 12 CS_ADC_5_12_2K
< 3 13 CS_ADC_5_13
> 3 13 CS_ADC_5_13_2K
< 3 14 CS_ADC_5_14
> 3 14 CS_ADC_5_14_2K
< 3 15 CS_ADC_5_15
> 3 15 CS_ADC_5_15_2K
Channels 16-31 were not in the model. They have been added and are being written to DAQ at 2048Hz (hence _2K suffix)
< 3 16 CS_ADC_5_16_2K
< 3 17 CS_ADC_5_17_2K
< 3 18 CS_ADC_5_18_2K
< 3 19 CS_ADC_5_19_2K
< 3 20 CS_ADC_5_20_2K
< 3 21 CS_ADC_5_21_2K
< 3 22 CS_ADC_5_22_2K
< 3 23 CS_ADC_5_23_2K
< 3 24 CS_ADC_5_24_2K
< 3 25 CS_ADC_5_25_2K
< 3 26 CS_ADC_5_26_2K
< 3 27 CS_ADC_5_27_2K
< 3 28 CS_ADC_5_28_2K
< 3 29 CS_ADC_5_29_2K
< 3 30 CS_ADC_5_30_2K
< 3 31 CS_ADC_5_31_2K
WP7696 DMT OS upgrade
Greg:
All three production dmt machines were upgraded to SL7.5
WP7697 Add BRS and SENSCOR channels to DAQ GDS Broadcaster
Dave:
As per John Z's request, I added one BRS and two SENSCOR DQ channels to the DAQ GDS broadcaster
+[H1:ISI-GND_BRS_ETMY_RX_OUT_DQ]
+[H1:ISI-GND_SENSCOR_ETMX_SUPER_X_OUT_DQ]
+[H1:ISI-GND_SENSCOR_ETMY_SUPER_Y_OUT_DQ]
Matlab and h0epics move to new VM machine
Carlos, Ryan, Dave, Jeff B:
The virtual machines matlab and h0epics were moved to a new VM server. We started the IOCs which run on h0epics (dust monitors, weather stations, dewpoint monitors). Weather channel alarm levels were restored from autoburt.
WP7702 h1pemcs model changes
Robert, Philippe, Dave:
Several changes to h1pemcs:
Renamed six accelerometers
Added two ESD power monitor channels to the first two channels of the fourth ADC
Instead of acquiring the first 16 channels of the fourth ADC to DAQ, now acquire the last 16 channels (still at 2048Hz)
The fourteen channels following the ESD monitor channels are available as test-points (no longer in daq)
Please see separate alog for details
WP7703 Add oplev blrms channels to HLTS
Jeff K, Dave:
New h1susbs,pr3,sr3 models were installed.
WP7704 IPC SUSPOINT infrastructure ISI to SUS feed-forward controls of QUAD.
Jeff K, Dave:
Added IPC senders on h1isiitm[x,y] (one each) and h1isietm[x,y] (two each for ETM and TMS). Added receives on SUS QUAD models.
QUAD SUS and ISI models were restarted.
WP7700 ISI HAM and BSC improved watchdog
Hugh, Dave:
New code for all HAM and BSC ISI models. All models were restarted.
WP7706 h1oaf addition of SUSPOINT DARM BLRMS
Jim W, Dave:
new h1oaf model was installed.
DAQ Restart
Dave:
DAQ was restarted at 13:07 PDT to support the above changes. h1nds1 did not restart cleanly and required a manual restart (via monit) at 13:30.
J. Kissel, D. Barker WP 7703 IIET 10819 ECR E1800166 Completing the above referenced ECR for LHO -- I've now installed BLRMS channels for the SUM of the optical lever of H1SUBS, H1SUSPR3, and H1SUSSR3 in order to better facilitate glitch hunting. (The QUADs' BLRMS channels were installed last Tuesday; see LHO aLOG 42752 ) H1:SUS-BS_M3_OPLEV_BLRMS_S_30M H1:SUS-BS_M3_OPLEV_BLRMS_S_30M_100M H1:SUS-BS_M3_OPLEV_BLRMS_S_100M_300M H1:SUS-BS_M3_OPLEV_BLRMS_S_300M_1 H1:SUS-BS_M3_OPLEV_BLRMS_S_1_3 H1:SUS-BS_M3_OPLEV_BLRMS_S_3_10 H1:SUS-BS_M3_OPLEV_BLRMS_S_10_30 H1:SUS-BS_M3_OPLEV_BLRMS_S_30_100 H1:SUS-PR3_M3_OPLEV_BLRMS_S_30M H1:SUS-PR3_M3_OPLEV_BLRMS_S_30M_100M H1:SUS-PR3_M3_OPLEV_BLRMS_S_100M_300M H1:SUS-PR3_M3_OPLEV_BLRMS_S_300M_1 H1:SUS-PR3_M3_OPLEV_BLRMS_S_1_3 H1:SUS-PR3_M3_OPLEV_BLRMS_S_3_10 H1:SUS-PR3_M3_OPLEV_BLRMS_S_10_30 H1:SUS-PR3_M3_OPLEV_BLRMS_S_30_100 H1:SUS-SR3_M3_OPLEV_BLRMS_S_30M H1:SUS-SR3_M3_OPLEV_BLRMS_S_30M_100M H1:SUS-SR3_M3_OPLEV_BLRMS_S_100M_300M H1:SUS-SR3_M3_OPLEV_BLRMS_S_300M_1 H1:SUS-SR3_M3_OPLEV_BLRMS_S_1_3 H1:SUS-SR3_M3_OPLEV_BLRMS_S_3_10 H1:SUS-SR3_M3_OPLEV_BLRMS_S_10_30 H1:SUS-SR3_M3_OPLEV_BLRMS_S_30_100 There're all EPICs channels, stored in the frames at 16 Hz. This closes that work permit and IIET ticket for LHO.
I have upgraded the DMT production computers, h1dmt0, h1dmt1, and h1dm2, in the MSR, to Scientific Linux 7.5 and patched and rebooted them. This completes WP: 7696.
TVo, Stefan, and Danny
We adjusted the pitch and yaw of ITMY and SR3 by a microradian while observing the x and y prism channels as well as the Hartmann gradient/contour plots. We also looked at the spherical and cylindrical power but didn't see any significant change.
| ITMY | Pitch (1 µrad) | Yaw (1 µrad) |
| Prism X | <0.1 µrad | 1.75 µrad |
| Prism Y | 1.8 µrad | <0.1 µrad |
| SR3 | Pitch (1 µrad) | Yaw (1 µrad) |
| Prism X | <0.1 µrad | 4 µrad |
| Prism Y | 4.3 µrad | <0.1 µrad |
We noticed that there is not a lot of cross coupling between Pitch to Prism X and Yaw to Prism Y.
Note that there is a fringing pattern in the contour plots (see attached) as we moved both ITMY and SR3.
Daniel, Thomas, Stefan,
After confirming with the ring heater that the HWS on ITMY is performing well, we again did a CO2 laser heating run. The animated gif is attached - a beautify fringe pattern, but clearly, it needs work.
We put in 3.7W for about 7min, and then shut it off. The attached gif has a snap shot every 60seconds, 20 frames.
Here is also a movie with the annular mask put in. We can actually see an annular ring section, although there are still inappropriate fringes across.
This curve was done with 6.2W of annular heating. (This was for the same power request as with the central mask.)
J. Kissel, J. Warner, D. Barker
While trying to add a few seismic channel BLRMS to the OAF model, we found that some ~2700 addition channels were also being added. This was a result of the update to the
/opt/rtcds/userapps/release/sus/common/models/DARMERR_VIOLIN_MODE_MONITOR_MASTER.mdl
that was rolled in during last week's update of the violin mode damping filters (see LHO aLOG 42752, IIET Ticket 8759, ECR E1700286). We don't yet want to perform this change to the OAF model, since it pushes the front-end code past its computational clock-cycle turn-around time limit. We'll look at re-installing once we've re-assessed the OAF model for splitting in half (see IIET Ticket 10520).
For now, I've reverted the library part to just before Stuart's upgrade
jeffrey.kissel@zotws10:/opt/rtcds/userapps/release/sus/common/models$ svn up -r 17490 DARMERR_VIOLIN_MODE_MONITOR_MASTER.mdl
Updating 'DARMERR_VIOLIN_MODE_MONITOR_MASTER.mdl':
U DARMERR_VIOLIN_MODE_MONITOR_MASTER.mdl
Updated to revision 17490.
jeffrey.kissel@zotws10:/opt/rtcds/userapps/release/sus/common/models$
such that Jim can push forward with his changes.
Daniel, Thomas, Stefan
- We added a button to the TCS-HWS medm screen that plots the contour difference between a reference time and the current time. For now the reference time is taken from /opt/rtcds/userapps/release/tcs/common/medm/referencetimeITMY.txt
- We really want a streaming version of this working, but the current streaming scripts are inoperational (and some of them interfere with the EPICS logging)
- With that we did a quick shot with the CO2 laser - it didn't look good... (plot 1) It almost looks like CO2 heating fringes... we will have to go back to this.
- We next wanted to verify that none of this is the fault of the HWS, so we did a ring heater run. That one looked reasonably well (plot 2), both in circularity and centering (note that the centering is sensitive to SR3 alignment).
- The optics are now cooling down over night - we will look at the CO2 heating again tomorrow morning.
We left ITMY ring heaters and CO2 lasers off last night and attached is the cool down between Jul 10 2018 5:00:00 UTC and Jul 10 2018 16:00:00 UTC.
It seems like the ITMY HWS beam is still pretty well centered on on the test mass based off the ring heater cool down pattern.
To verify the calibration of the HWS with the ring heaters, we tried to match the COMSOL model of the transient heating here with the readout of the HWS sensing the RH heating (picture attached).
From Aidan/Stefan's remarks about the linear part of the RH absorption, the lensing effect can be approximated by
dS/dt = 6.75E-9 diopters per second per Watt
Using this equation we estimate that the Comsol model agrees with the HWS up to about 20% which is roughly consistent with previous tests.
| Method | Slope of thermal lensing in linear regime |
| COMSOL | 0.10 microdiopters/sec |
| HWS Spherical Power | 0.08 microdiopters/sec |
aLOG 37666
Looked at the BS UR signal as reported by Jenne. Disconnected noise monitor outputs of coil driver and shorted the inputs to the AA chassis. From here we could see that UR has ~10dB gain difference than the other channels. Power cycled both the AA and coil driver, transfer function showed no change. Coil driver S1000355 in SUS-C6 slot U26 was replaced with S1100039. Transfer function for all signal outputs the same.
F. Clara, J. Driggers, R. McCarthy
Corresponds to FRS Ticket 8594, marked as pending for closure given this fix.
It was determined that the last interface stages of the driver section for CPB/CBN(Fast Current +/-) that feed the Monitor board weren't able to drive the downstream circuits. ICs 9&10 were replaced and the issue with the channel was resolved.