Added 423 channels. Removed 272 channels. Changes attached.
WP 5751 FRS 4424
Jim logged the problem, 25713 on Thursday. Today I swapped in another board (probe 13440) but the performance was much worse. Microsense did not tell me that would be the case so I don't know what that says about this 13440 unit. Maybe it says a lot or perhaps nothing.
After seeing that this replacement was not going to cut it, I swapped the original back in. Funny now, the performance is much better but still not a good as the other sensors--see the attached. In this uncalibrated spectra, the cluster of fine traces at the bottom are all the other stage2 CPSs. The black trace is H3 before the swap. The high green trace is H3 with the alternate board (not good) and the yellow is H3 with its original board back in place.
So is it the power cycle, maybe a contact scraping/cleanup, that has recovered the performance? Maybe the board should be removed and plugged back in a number of time.
1/2 open LLCV bypass valve, and the exhaust bypass valve fully open.
Flow was noted after 20 seconds, closed LLCV valve, and 3 minutes later the exhaust bypass valve was closed.
Next over-fill on Thursday, March 3rd before 23:59 utc.
After a LN2 delivery to CP3, Kyle suggested to visit the Y-Mid station to see how CP3 was doing, there was LN2 being spilled out of the exhaust pipe. At 22:23 utc I decreased the LLCV valve setting to 15%, previous setting was 18%.
Maintenance list in earlier alog.
DAC reboots by DaveB since that post.
Currently TCS is working with heating on ITMs.
Alignment and locking resume after their work.
(Chandra, Gerardo and Kyle)
Regenerated NEG pump with the aid of an aux cart.
Valved out NEG pump from X-End, then started regeneration of NEG pump ~19:00 utc.
2 hours later heating was complete, waited for temperature to drop down, valved in NEG pump to X-End volume at 21:45 utc and @ 92 deg C.
Pressure plots attached.
-Chandra
Finished adding Caps to the Negative regulator per latest dwg. Today we completed the ITMx,ITMy,BS, and all of Ham5 and Ham6 Suspensions. Also verified and corrected were needed Ham2 optics. This should stem any oscillations caused by the long cables from the SAT amp side.
I've verified with Richard that this concludes the H1 SatAmp upgrade as per Integration Issue 1129, DCN E1100767, and G1100856. Nice work gents! Stay tuned for a systematic check of how-and-if it has improved the high frequency oscillations this upgrade was intended to fix.
IM2 signals changed behavior on 23 Feb around 19:00UTC.
Pitch and Yaw signals sent from about 1 count pp to 6 counts pp.
Looking at OSEM signals, UL and LL decreased in pp counts, UR remained about the same, and LR increased it's pp counts.
Plots attached: power spectrums look very similar to the "good" values, time series shows the OSEMs and the increased pitch and yaw signals.
Monday: Noise hunting (sort of)
Tuesday: ITM preloading, SRC work, get back to locking
Wednesday: WFS (morning) & noise hunting (later in the afternoon)
Thursday: Noise hunting (all day)
Nairwita and Jeff found yesterday that the foton file for HAM5 did not show the same controller that the seismic matlab commissioning scripts said were installed. The changes weren't huge (some very different low frequency gains, but only factors of a couple at a few hz), and are shown in the two attached plots. First figure is the old filters, second is the new filters. While everything was down this afternoon I've installed the Matlab filters. I don't expect any difference in the performance at HAM5, the diffrences are not huge, this was mostly a housekeeping task, to make offline modeling work easier. I still haven't figured out why the difference, but it would likely take digging through months of archived foton files. This also makes the controllers at HAM5 more similar to HAMs 4&6 over 1-10hz.
(Fil Keita Daniel)
OMC PZT dither: change cap for 1000 less analog gain. Issue 1208, ECR TBD. Done
OMC DCPD bias voltage: increase bypass caps on power supply. Issued 1207, ECR E1600061. Done
H1:OMC-LSC_OSC_CLKGAIN was increased by a factor of 10 (from 600 to 6000) as the old resistive divider was providing a factor of 100, not 1000.
Units modified are listed below:
1. OMC PZT Dither Modification (HV power supply set to 100V, 80mA)
Chassis D1300485 SN S1301298
Board SN S1301288
2. OMC DCPD Bias Voltage Modification
Chassis D1300520 SN S1101603
Board SN S1301540
Cao, Nutsinee, Elli
We replaced the ITMX HWS SLED with a spare.
We remeasured power coming out of the SLEDs using an Ophir power meterhelp directly in front of the fiber.
The ITMX SLED power was 1.35mW (running at 98mA current)
The ITMY SLED power was 2.90mW (running at 103mA current.)
The SLED power channel H1:TCS-ITMX/Y_HWS_SLEDPOWERMON was recalibrated using new gains and dark offsets
H1:TCS-ITMY_HWS_SLEDPOWERMON=0.48*intput-0.0071
H1:TCS-ITMX_HWS_SLEDPOWERMON=1.089*input-0.154
We tested ITMX's HWS by applying a high heat on CP by the CO2 laser. It seems that it is properly functioning. Also the simulator does not seem to be terribly off in the prediction. Once we know the interferomter heating, we can start testing the pre-loading on the X arm.
Posted are the data from the 3IFO desiccant cabinet and the two dry storage boxes for February. Data shows no apparent problems.
Site activities: some started before 16:00UTC (08:00PT)
- 15:14 Richard - SUS work, ITMs, BS, and MMT1
- 15:23 JeffB - both end stations for Dust Monitor install
- 15:30 ChrisS to mid-X to retrieve items, no VEA entry
- 16:11 Fire Department - testing in OSB
- 16:11 Filiberto/TJ - EY then EX RF cable pulling
- 16:27 Christina - EX and mids
- 16:28 Hugh - restarted HAM4 and HAM5 models, all working
- 16:43 Ryan - restarting Remote Access, alog
- 17:00 GRB test alert
- 17:30 ChrisS - resumes beam tube sealing on X-arm roughly 300 yards from corner station
- 18:00 Gerardo - BSC5 recharge canister outside of chamber, 6 hours
- 18:00 Cheryl - H1 PSL Anti Room access for parts
- 18:02 Brynley/Vinny - heading to EY to get their magnetometer equipment
- 18:10-18:43 DaveB - SUS hardware wd swap out (CERitmy & EY ETMy)
- 18:10 portapotty service
- 18:12 ITMx sattelite back
- 18:13 Paradise water
- 18:23 Elli, Nutsinee - looking for TCS sled in west bay
- 18:44 Dave - ETMy SUS hardware wd swap
- 18:45 Ken - variacs work for bubba
- 18:45 JeffB - completed dust monitor work at end stations
- 18:57 Ed, JoeD - HAM5/6re-install sattelite amps
- 19:21 DaveB - done at EY with SUS hardware watchdog
- 19:21 JimB going to EX to look at electronics
- 19:50 Kiwamu - CO2 laser heating tests using ITMs and SRC
As of 23:20UTC
- 21:05 Kyle - back from EX - Gerardo still out there
- 21:05 Filiberto and Ed - back from end stations - Filiberto will return after lunch
- 21:14 Joe - back in the LVEA for battary checks, complete
- 21:21 Daniel/Filiberto - at OMC for PZT dithering work
- 21:59 Daniel/Filiberto - returned
- 22:12 Gerardo - done at EX at BSC5
- 23:20 Gerardo - at My to fill CP3
- 23:20 Hugh - changing out hardware installed earlier today at EY
8:50 - 9:53: Ran charge measurements on ETMX & ETMy, per these instructions.
The only activity at end stations were: Fil & TJ were pulling CPS RF cables at EY (8:25-8:58) & then EX (9:49-ongoing).
Here are the alignment slider values (before/after):
ETMx:
ETMy
The Vacuum crew was also at EX while we were there, Just in case this is important.
WHAMs 2 & 3 models were built by Hugo/Vincent while Jim and I were busy building things. When Jim & I got to bringing the other HAMs up, we did not realise there was a modification needed to generate a non-cust medm screen. This screen is the PAYLOAD button on the ISI OVERVIEW that gives access to the SUS and the SUS-model-is-not-running-so-trip-the-ISI override controls.
The attached image shows the model elements needing correction.
I switched the Chamber Guardian to STOP. Interestingly, it then reloaded its code and switched itself to PAUSE, huu? Anyway, it stayed there and then the ISI Guardian was switched to READY. The utility of oing this is to keep HEPI ISOLATED. Once there, I opened the MASTERSWITCH and updated the safe.snap for FF settings.
JimB then restarted the FE. The medms are now available and the ISI reisolated fine.
Apparently, I failed to file a work permit nor Inegration Issue, else, I'd list those items here.
