Removed one of the PEM AA chassis to troubleshoot some bad channels. Troubleshooting/repairs is taking longer than expected but should have the unit back in service sometime tomorrow morning. D1001421 Serial Number S1001053.
Kyle and Gerardo opened the XEND to the beam tube today.
The turbo was valved out, the ion pump valved in, and the gate valve to the tube/80K pump opened.
Plot attached. The pressure has fallen from 1e-6 to 8e-8 and is still moving the right way.
The clean room remains on at X-end, righ above BSC9, clean room will be dealt with by facilities tomorrow.
(Kyle R, Gerardo M)
Removed and replaced the annulus ion pump.
NOTE:
Currently there is a pump cart pumping this annulus system, will remain there until system pressure is down enough to turn on the ion pump.
J. Kissel, K. Izumi Kiwamu is making sure the online calibration filtering (currently in the "OAF" model, will eventually be in the "CAL" model) is reasonably up-to-date. In doing so, we discovered that the two ETMs have different damping loop filters installed and ON. Most filter modules are as expected, according to the original, low noise, Level 2.1 quad design (see LGO aLOG 6760). However, in FM3 of the L and Y banks of both ETMX and ETMY, there are filters called "resg1" and "+12dB" respectively. They are ON only in ETMX. After a little digging down memory lane, we recalled that in attempts to get ALS DIFF up and running last time (see e.g. LHO aLOG 15025), before we lost the arms, we had copied over LLO's damping filters' differences at the time -- described in detail in LHO aLOG 14959. However, as indicated in LHO aLOG 15037, having the filters constantly ON never got captured in any sort of configuration control, because ALS and LSC control was bouncing between using ETMX and ETMY depending on the functional-state and state-of-confusion for each test mass. We have now turned both FM3's of L and Y filter banks ON, and changed the DAMP_STATE_?_GOOD state to match the current state with those ON. We have not yet captured a new safe.snap in this configuration, but we'll do so ASAP. A note -- the ITMs do NOT have these "bonus" LLO filters installed, so FM3 is therefore OFF.
Replaced bad projector lamp on left side projector in control room. NOTE: The lamp socket internal to the projector has badly overheated and the plastic mount that holds the socket pins has lost it's integrity. If you smell smoke in the control room, this projector should be powered off. This seems to be a common problem with these projectors.
For the Schnupp asymmetry measurement, one of the patch panel connectors on ISC R1 (by the PSL) is now wired to another patch panel connector on ISC R3 (by HAM6). The wiring is as follows:
Initially, all these ports were labeled as "spare" and most of them were terminated.
The connector on ISC R1 will be driven by an rf signal from an IOT2R PD. The connector on ISC R3 will go into a spectrum analyzer.
DAQ was restarted to sync up with temporary h1iscey model change which was applied in the last hour.
restarted h1iscey model, looks like it wasn't started completely due to obsolete wiki restart instructions.
We only restored PIT of HEPI2 (H1:HPI-HAM2_IPS_RY_SETPOINT_NOW) yesterday, but there was a change in ROLL (RX) on the order of 10 urad that was not restored, which might affect the input pointing.
Also, there was a jump in ROLL in HEPI3, again on the order of 10 urad, which would affect POP and ALS beam position on ISCT1 as well as POP sled in HAM3.
These DOFs were brought back to pre-maintenance levels.
I don't know/remember why, but it seems that a new set of angle setpoints is made for HEPI such that the system starts new with free-hanging position after each restart. Seems like this free hanging position changes over time.
Since any change in HEPI angle (RX, RY and RZ) on HAM2 and HAM3 would affect many things related to the alignment, most notably pointing references like IM4 transmission QPD and POP sled, it's a good idea to keep the set points unchanged over multiple restarts.
I've done a survey a of all the SEI Guardians with regard to the position dofs that are restored (maintained everytime.)
HAM_ISIs maintain every dof but the HAM_HEPIs only maintain the RZ dof. I'd say this is backwards given the range and more importantly hysteresis of HEPI.
While at it, for the BSCs: their HEPIs all maintain the RZ dof, the ETMs maintain their pitch and the ITMY maintains pitch roll and X dof to deal with ACB install and Initial Alignment. The BSC ISIs maintain NO dof.
It certainly makes sense to me that at least the HAM2 & HAM3 RX & RY dofs are also restored along with the RZ. Don't know why we wouldn't do this with HAMs 4, 5 & 6 too. The X Y & Z dofs are probably okay to let wander but commissioners can comment.
I noticed the autoburt VM was behind in patches, so I updated it and rebooted in between snapshot runs. There should be no gaps in the autoburt coverage, though the next run may take longer as the embedded gateway re-caches the PV names.
Replaced the ISI Coil Drivers D0902744 for HAM3. This is a temporary swap to help with troubleshooting the 0.6Hz seen in HAM3. Electronics removed: S1103321 U24-U25 S1103358 U23-U22 Electronics Installed: S1103316 U24-U25 S1103301 U23-U22
model restarts logged for Mon 12/Jan/2015
2015_01_12 08:59 h1nds0
2015_01_12 10:49 h1hpietmx
2015_01_12 10:49 h1iopseiex
2015_01_12 10:49 h1isietmx
2015_01_12 13:41 h1fw0
two unexpected restarts. ADC replacement of h1seiex in preparation for RCG2.9 upgrade.
model restart for Tue 13/Jan/2015
in attached file. RCG2.9 upgrade required all systems to be restarted. Several later unexpected DAQ restarts of frame writers.
Now that ETMX is back to vacuum, I measured a trend of the effective test mass charge voltage over 3.5 hours. The sensor was the oplev, since there is no cavity. I was told by Jeff K, who was told by Richard (or was it Kyle?) that the ion pump is valved out. The pressure was about 1.5e-6 torr, pumping with the turbo for about 2 days since the last vent.
The first pdf shows the charge seen the pitch and yaw oplev signals from excitation in each ESD quadrant. The second pdf shows the deviation from the average of each quadrant - oplev siignal pair, e.g. pitch from UL exc, etc. The largest deviation is -12 V. Most of the data is within +-10 V.
The charge measuring script is
/ligo/svncommon/SusSVN/sus/trunk/QUAD/Common/Scripts/ESD_UL_LL_UR_LR_charge_07-H1.py
The charge analysis script is
/ligo/svncommon/SusSVN/sus/trunk/QUAD/Common/Scripts/ESD_UL_LL_UR_LR_analysis07_H1.m
The charge trend script is
/ligo/svncommon/SusSVN/sus/trunk/QUAD/Common/Scripts/Long_Trend_H1.m
Yes, the ION pump is valved out. You can see on the EX Vacuum MEDM screen that IP12 is registering 4 decades better pressure than PT510. Therefore it is isolated from the BSC volume.
https://lhocds.ligo-wa.caltech.edu/screens/png/H0VE_EX-current.png
Jim, Dave: WP5003
This morning we upgraded H1 FE and DAQ to RCG2.9. First the DAQ was upgraded and restarted. Then FE startup scripts were changed, model startup scripts changed.
Then a "make installWorld" was ran to install the models which were compiled yesterday. The H1.ipc file generated yesterday was re-installed.
We tested a reboot-restart first on a non dolphin FE (h1susauxh2) and then on a Dolphin FE (h1seib1).
We then restarted all frontends in the MSR by power cycling the computers, and end station frontends by rebooting the computers. We ended up having to powercycle h1iscex because it got stuck in reboot. In the MSR when we were restart testing, h1susb123 got stuck on reboot and needed a power cycle which Dolphin crashed the other MSR machines.
We got to a stable system with DAQ and FE reboots proceding correctly. We had 6 front end IOP models with large IRIG-B excursions into the 1000-2000 counts. The h1oaf0 IOP took 4 hours to return to normal IRIG-B range. One IOP went below zero (999998) which caused IPC errors on models receiving its channels. This fixed itself in about 10 minutes.
We noticed a single ADC error on the h1ioplsc0, which was cleared with a DIAG_RESET.
We noticed the DAQ frame size is smaller now. For science frames 670MB to 610MB (10% reduction) and commissioning frames 1.2GB to 1.0GB (20% reduction). We suspect new common models are the reason for this.
I linked Jamie's SDF_OVERVIEW MEDM screen to the SITEMAP under the GRD section. We are configuring the IOP, PEM and PSL systems.
This closes WP5003
Frame size reduction was bogus. I checked too soon after the reboots when systems were not fully engaged and the frame was compressing zeros. After a few hours of ifo operation the frame sizes came up to nominal. Attached plot show commissioning and science frame sizes for the past two days.
J. Kissel, S. Dwyer, D. Sigg, E. Hall, N. Mavalvala After performing all of the usual alignment position checks (SUS, SEI, MC TRANs QPD, IM4 TRANS QPD), after the RCG 2.9 upgrade (see LHO aLOG 16040) we've confirmed that the IMC REFL path has jumped down in pitch again as it has done several times in the past after major computer reboots or SEI/SUS events (see Integration Issue 854, LHO aLOGs 10335, 11481, and 15650). We didn't preserve camera views prior to the reboot, and I didn't get the chance to capture an UNLOCKED camera view in which the REFL path was similarly low, but I attach the misaligned views after the RCG, then SEI and SUS recovery before realigning the path, and the realigned views after Evan, Sheila, and Nergis have realigned the whole path. We've also confirmed that the MC WS are running happily now as well. Note that the IMC REFL L RFPD and trigger PD are on different image planes and lens focal points than the MC WFSA and MC WFSB and MC REFL GIGE Camera (see D0902284), so it's to be expected that they're differently affected by a misalignment of the MC REFL path. In other words, the IMC LSC path is much less sensitive to misalignments than the IMC ASC path (which contains the MC REFL GIGE Camera View). Finally, for future reference, I attach a screenshot of all of the relevant camera views and screens I can for the IMCASC and surrounding sensors, with 2015-01-13_H1IMC_Status_ScreensandCamera.png
We added an iris to the IMC refl path on IOT2L, in front of the calcite polarizer, in the hopes that we can use this next time to recover the alignment.
Keita, Brett and I also noticed that HAM2 HEPI moved between before and after the bootfest, as can be seen both on the oplevs and the IPSs. (RY, which is pitch, was different by about 15 urad before and after the bootfest) We have restored HAM2 RY, but I didn't finish checking this for the rest of the chambers since the schnupp crew want the michelson locked for now. In the morning we will have to go through the rest of the chambers and redo the alignment procedure.
This isn't a big enough shift to explain why we had to realign on IOT2L earlier, but restoring this did bring the IM4 trans QPD back to almost the same position it was at before the bootfest.
