1:30 pm local Took 20 sec to overfill CP3 with 1/2 open on bypass LLCV, but found the entire exhaust line frosted over with a pile of snow on ground. Looking back at last year's LLCV level after a Dewar fill, I decided to lower the LLCV yet again from 17% to 16%. Left bypass exhaust valve open.
I added a second class to (userapps)/sys/common/guardian/cdslib.py for the Beckhoff FEs. This will look through the autoburt.req's that are created upon build, and find the DCUID from the model name, or vise versa. Code is loaded in and committed and the diffs are being reported.
[Jenne, Cheryl, Nutsinee]
We tweaked the calibration of the PSL rotation stage, which hadn't been done since the power incident on the rotation stage was adjusted about a week ago. Now hopefully a 50W request will give us 50W, rather than some higher value. Nutsinee has her script ready for next time, so we can try doing it automatically rather than by hand.
I have written a fitting script for PSL rotation stage calibration, and put it in ...../userapps/psl/h1/scripts/RotationStage/
First, run Nutsinee's script MoveRotationStage.py, which will move the rotation stage from -90deg to +90deg, in 5 degree steps, and record the measured angle and the power at the PSL periscope to a text file.
Then with Matlab, run CalibRotStage.m. This will load the data, calibrate it, and give you a plot with the fitted calibration parameters in the legend.
Finally, move those values to the PSL rotation stage's calibration screen.
Unfortunately though, when we use the LASER_PWR guardian to request 50W, we only get about 48W. This was true earlier with my hand-tuned calibration, as well as with the fits. This is something that could be looked into.
State of H1: locking and has made it to Low Noise
Activities:
Other Site Activities:
I have created new DAQ and HWWD oveview screens. The DAQ displays the additional diagnostics information Jonathan's new code produces. The HWWD includes the ITMX and ETMX systems which were installed yesterday, and shows which systems are connected to the ISI coil drivers.
I added 250mL of water to the TCSy chiller this morning, bringing the reading on the scale from 4.5 to 9.0.
In addition, the TCSy CO2 laser tripped out this morning on a flow alarm. Peter and I reset the laser box (key off, then key on) to clear the alarm and restart the laser. Cheryl had trended the flow channel for the CO2 laser and indeed the flow dropped to zero and recovered (I don't have the trend, perhaps Cheryl will post it later). Maybe an air bubble working its way through the system?
That's a bit concerning and not something that I believe we've seen (other than on this one system recently). Certainly possible that it's an air bubble. We'll need to watch this because if the flow sensor causes it to trip out then we will start having down time on the laser. Are there any bubbles visible in any of the tubing or do you think these are getting trapped at some high point in the system? The highest point overall should be up at the chillers, but there will be other local high points such as on the table.
The trend suggests that the flow rate only went to 0 for 3 seconds then made its way back up. Bubble does sound reasonable.
There look to be some regular dips in flowrate, perhaps also bubble related. Might be easier to see in non-trended data how long and deep these dips are.
I took a 30 second full data trend from the trip, also including the interlock signal. As can be seen the flow rate is not at its usual value of ~3.0 gpm for approximately 10 seconds. Interestingly, the interlock does not trip until the flow has been below nominal for ~3 seconds. Is this the expected behavior of this interlock?
There is a low pass filter on the input, so yes that's expected behavior. I am surprised that it goes negative though - this should be linear in current from the flowmeter which makes me think it can't go negative without the flowmeter running backwards.
(Late entry for yesterday's Maintenance Day activity) Kyle, Gerardo Scheduled preventative maintenance -> Measured discharge pressure to be =/> 115 psi - OK, greased motor shaft bearings with Chevron SRI and scroll compressor orbital shaft and crank pin bearings with Anest Iwata SL-140. Belts visual and adjustment - OK.
| Work Permit | Date | Description | alog/status |
| 6244.html | 2016-10-11 11:46 | Look at POP-X whitening chassis figure our why gains can only be odd values. Also look at second stage filter not engaging properly. Possibly replace chassis | The modbus internal readback is broken,but the device is functional, i.e., its input and outputs work as expected. Mark as "wont fix". |
| 6243.html | 2016-10-11 10:11 | At the request of DetChar, update the thresholds of the PSL ODC to account for the now operational HPO. A review of the current PSL ODC thresholds shows the only bit in need of updating is PSL ODC Bit 12: PMC Transmission Limit OK. The threshold will be changed from 11.5 to 50, to account for the increased power transmitted by the PMC. | 30405 |
| 6242.html | 2016-10-11 08:13 | migrate virtual machines from vmweare to proxmox | 30429 |
| 6241.html | 2016-10-11 08:04 | Briefly run scroll air compressor(s) on Vent/Purge-air supply skid*Lock-out/Tag-out power to Vent/Purge-air skid*Perform scheduled maintenance on scroll compressors #1 and #2 | preventative maintenance, will be a famis task and this is the initial entry |
| 6240.html | 2016-10-10 17:05 | Pico ctrl report error when off: revert logic - LO readback for spares flicker: use nom. of -100 to disable test - EOM driver RF monitor: increase tolerance to 1.5dB | 30406, 30429 |
| 6239.html | 2016-10-10 16:51 | Fix whitening ctrl in QPD | 30412, 30429 |
| 6238.html | 2016-10-10 16:13 | CALCS model update. A filter block will be added to the DARM_CTRL signal path (implemented at LLO alog 28268), changes to BUFFER_AND_AVERAGE.c code will be applied (LHO alog 30293). | 30411, 30429 |
| 6237.html | 2016-10-10 15:43 | Remove the Solaris QFS/NFS server h1ldasgw2. This was installed in the summer to NFS export frames to the NDS servers. It has served corrupted frames, so we will return to the previous configuration. | Did not remove h1ldasgw2, WP#6237, do to time constraints; will defer this to later in the week |
| 6236.html | 2016-10-10 12:46 | sister WP to 6234. Change h1susitmx and h1susetmx model code to read HWWD chassis status. DAQ restart required. Modify MEDM and alarms. | 30429 |
| 6235.html | 2016-10-10 11:50 | add an experimental feed forward path for jitter correction | 30412, 30429 |
| 6234.html | 2016-10-10 11:10 | Per FRS 4504, finish installation of the Hardware Watchdog (HWWD) electronics for ETMX and ITMX. Currently, ETMY and ITMY electronics are installed, with ITMY in a monitor-only mode. Plan is to install ETMX and ITMX in monitor-mode. List of items that need to be done: 1. Install D1300642 2. Pull in new BNC cabling to ISI Coil Drivers 3. Pull binary cabling DB9 4. Power electronics For complete installation, the ISI Coil Drivers (ETMX, ITMX, and ITMY) will need to be replaced with modified units that enable the HWWD electronics to power off the coil drivers. New work permit will be started for switching out the coil drivers. | 30418 |
| 6233.html | 2016-10-10 10:43 | Reconfigure lhoepics.ligo-wa... to host an EPICS to web bridge. This may interrupt the remote access medm. Also revisit the process for exporting the medm screens from CDS to ensure they still work after the recent shibboleth IdP changes. | 30372 |
| 6232.html | 2016-10-10 10:38 |
Install a newer daqd framewriter on h1fw0 and h1fw1. This will use the framewrite tested on h1fw2 which writes out checksum files with each frame file written. This will likely also involve a change to the wiper script to properly handle the checksum files |
30429 |
| 6231.html | 2016-10-10 10:24 | GDS and DMT Update GDS to gds-2.17.10, the DMT calibration code to gstlal-calibration-1.0.4-1 and install new calibration filters. Patch summary for GDS: a) t-domain lowpass filter and overlapped PSD measurements for SenseMon. b) a fix to prevent writing frames with wrong times. c) Cookie file for dmt-viewer d) prevent framelink from terminating immediately if the connection to the peer node fail. Patch summary for calibration: - Bug fix for coherence gating in kappa calculation - Explicit check on frame start time being integer multiple of frame duration - Increased debugging messages available for when discontinuities are encountered ALSO: install new calibration filters as available | 30409, 30403, & 30429 |
| 6230.html | 2016-10-10 08:58 | Replace bulkhead N connector for the 45MHz RF signal. Check associated field cables/connectors. | 30394, 30375 |
| 6229.html | 2016-10-10 08:50 | Update the TCS front end model to the latest. DAQ restart required. | 30384, 30429 |
| 6228.html | 2016-10-10 08:23 | PCal End X Transmitter module maintenance measurements and end station calibration. This will require that EX VEA is laser hazard. No viewports will be exposed during this work. | |
| 6227.html | 2016-10-10 08:23 | Complete ECR E1500325: Update HEPI Model to bleed off saturations from watchdogs--currently a weekly chore manually done by operators vis FAMIS. ISI already have this feature and has been working trouble free for months. | 30408, 30373, & 30429 |
| 6226.html | 2016-10-10 08:17 | Perform annual septic tank pump out. This includes all septic tanks on site. A report will be generated for LIGO and the DOH. | Contractor canceled. They will reschedule |
| 6225.html | 2016-10-09 10:17 | Remove viewport covers on HAM2 | 30364 |
| 6224.html | 2016-10-07 08:52 |
Install a new DAQD build on the framewriter that provides checksum information of each frame file that is writen, and reflecting some of this information into EPICS PVs. This will be done on h1fw2 as a test prior to deployment on the production frame writers. This will require remote access to CDS today for Jonathan. |
30292 |
| 6223.html | 2016-10-07 08:21 | Update GDS software to branch gds-2.17.9. This implements updated security code in dmtviewer to handle ecp cookie files now required for authentication. The user setup scripts will be modified to add an environment variable to specify the location of the ecp cookie file that would be generated by a user. | This version 2.17.9 is for control room software, version 2.17.10 is for dmt-gds. |
| 6222.html | 2016-10-06 16:10 | (late WP) Move CPs and ITMs to confirm the sled reflection from the ITMY CP. Swap sleds (790nm and 840nm) on the HWS table. Repeat the process to see whether the reflection off the CP is wavelength depended. | done |
| 6221.html | 2016-10-06 13:52 | Coordinate test running of pumps connected to RGA at BSC5 with Robert S. so as to measure potential intrusiveness into commissioning activities. | pending, pump isolated but not running |
| 6220.html | 2016-10-06 10:16 | Add jitter measuring signals of DBB to frame. | 30287 |
| 6219.html | 2016-10-05 14:34 | Place a new photodiode in the EOM pickoff path and use this as PD_A sensor to close the ISS 1st loop. PD_B will remain untouched and therefore remain functional. | done |
| 6218.html | 2016-10-05 13:26 | Replace the 16 Batteries in the Aux cabinet of the UPS. This work will be done when we are out of lock but not necessarily when we are in maintenance. The design allows for this work to be done while the output is energized. | Replaced 15 batteries, the 16th was damaged and we are waiting for its replacement |
| 6217.html | 2016-10-05 09:06 | Complete ECR E1600042 FRS 4703: Remove final traces of DACKILL from HAM ISI model: Make changes, recompile, etc restart. Cleanup HAM & BSC medms of dead widgets. Remove RESET ALL from medms. | 30408, 30373, & 30429 |
| 6216.html | 2016-10-05 08:14 | As part of debugging the cooling problem with the laser, at the next window of opportunity I want to do a test where we replace the front end and power meter circuit flow sensors with a current source that mimics the output from the flow sensor. This check the flow rate readout electronics. | done, electronics chain appeared to be ok |
12:35 NLN
14:55 Gabriele in to do some commissioning
WP 6223 On Tuesday, a new version of GDS software, branches/gds-2.17.9, was installed for the control room. This version has one minor bug fix to diaggui (Bugzilla 1040) for the reference trace dialog box, and code to allow dmtviewer to use cookies generated by ecp-cookie-init for authorization. The script ecp-cookie-init was also installed. The dmtviewer change allows us to display both LHO and LLO range again. The standard environment setup script was modified to set a new environment variable telling dmtviewer where to find the cookie file for a particular user. To use dmtviewer to view LLO data, do the following three commands: kinit albert.einstein (enter password) ecp-cookie-init -k https://llodmt.ligo-la.caltech.edu/dmtview/LLO dmtviewer It is highly recommended that you do this when logged in as yourself, not as user controls. If you need to clear the authorization, perform the following two commands: kdestroy ecp-cookie-init -X
Cleared ST1 and ST2 BS accumulators.
Thanks Ed. Couple things. Not sure where St1 and St2 come in to play for HEPI, that sounds like ISI. Plus, with the upgrade done to HEPI yesterday, no seismic system should need the Watchdog saturations clearing anymore. I'll remove the FAMIS task associated here for HEPI.
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)
Regarding the following:
WP6217 ISI frontend code upgrade
Hugh, Jim B
All ISI models were restarted with new code
Only the HAM ISIs models were updated. I might have implied to DaveB that I was going to do something to the BSC ISIs but in the end I do no changes there.
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
The trip Peter discusses above took place at around 6:17am PDT on Sunday, 10/9/2016.
The laser did trip off on Saturday (first reported by Patrick here) at 21:06:02 PDT (04:06:02 UTC, Sunday 10/9/2016). As noted by Kiwamu the reason for the trip was due to a trip of the Laser Head 1-4 Flow interlock.
PSL_Heads_Flow_2016-10-8.png shows the 4 laser head flow sensors around the time of the trip; head 4 is once again the most likely culprit. As seen in the plots posted above by Peter for the early Sunday morning trip, head 4 sees a spike in flow rate before falling off to zero. Interestingly, when compared to the actual interlock (PSL_Head4_v_HeadIL_2016-10-8.png) the interlock trips just prior to the spike in flow rate; from the plot it can be seen that the interlock starts to trip just before the spike in head 4 flow begins. The trip threshold at this time was set to 0.2 lpm, which none of the flow sensors were below at the time the interlock tripped; I can't explain why the interlock tripped.
PSL_Head4_v_XChil_2016-10-8.png shows the crystal chiller turning off several seconds after the interlock trips (5 seconds after in this case). I've noted this before (here).
PSL_Head4_v_InletP_2016-10-8.png shows the head 4 flow rate versus the inlet pressure in the PSL water manifold. The oscillation in the pressure occurs after the interlock tripped and has been seen before (noted above by Peter and here).
Evan, Daniel
17:12:30 UTC Oct 7 2016:
17:16:30 UTC Oct 7 2016:
17:18:30 UTC Oct 7 2016:
17:24:30 UTC Oct 7 2016:
17:32:00 UTC Oct 7 2016:
17:34:30 UTC Oct 7 2016:
18:06:30 UTC Oct 7 2016:
Spectra attached.
Coherence (modulation on)
Using 2600 V/W for the demod gain and transimpedance, and 29 mW of dc PD power, this implies the following AM depths:
| I | Q | |
| 9 MHz | 0.95×10−4 | 2.4×10−4 |
| 45 MHz | 1.9×10−4 | 8.2×10−4 |
Using 0.22 rad and 0.28 rad for the 9 MHz and 45 MHz modulation depths, this implies the following AM/PM ratios:
| I | Q | |
| 9 MHz | 0.43×10−3 | 1.1×10−3 |
| 45 MHz | 0.67×10−3 | 2.9×10−3 |
The attachment contains a budget of the expected CARM residual. The in-loop error point is taken from the CM board control signal, as was done previously. Here I used 2600 V/W for the transimpedance and demod gain.
The other measured traces are taken from the REFL9I readback (not from the CM board), so in principle there could be some extra dark noise at the error point from the summing node board or CM board. However, based on the O1 level this is of the same order as the shot noise (so we are not missing a huge amount of extra noise in this estimate).
Attaching earlier RAM plot, this time with informative labels
Here is a time series of REFL LF during the modulation depth reductions that happen during lock acquistion.
During the 9 MHz depth reduction (from 0.22 rad to 0.11 rad), the dc power changes from 4.83(3) mW to 4.27(3) mW. That means that after the modulation depth reduction, 4.08(4) mW of the dc light is from the carrier and 0.19(2) mW of the dc light is from the 9 MHz sideband (this assumes the 45 MHz contribution is negligible).
Note that the dc level is still settling to its final value of ~3.7 mW, so it's possible that these power ratios are evolving during the lock.
