The north door on ham 5 was removed this morning. We replaced the adapter spool at GV 7 and installed the annulus piping. The cleanroom was transported from the north bay to north / west bay main crane access area.
Dan and Dave.
h1fw0 was down for about an hour today, Dan performed diagnostics on the /ldas-h1-frames file system. He first tried a samfsck on the file system, but the problem reappeared within 5 minutes. After many other investigations we ended up rebooting the h1ldasgw0 machine and h1fw0 has been stable for over an hour.
905 - Manny working on LVEA electronics along X-manifold
933 – Jeff B monitoring particle counts as HAM 5 door removed, then replacing fuses in all LVEA dust monitors
959 – Betsy working in Beer Garden @ ITMY
1033 – JimB and DaveB @EY checking AA chassis and restarting IOP WDs
1130 – Aaron to EY to pull shorted AA chassis
1136 – Dave B shutting down fw0
1151 – Dave B restarting fw0
1313 – JustinB recovering ETMY trip (reset all watchdogs incl IOP, requested fully_isolated via guardian)
1301 – Betsy returning to ITMY work
1424 – JeffB and Andres prepping for magnet gluing at HAM5
1530 - Thomas and Greg at EY working on HWS
Lights in laser and ante room are ON. Cover missing on HPO and DBB. Unsure about HVAC fan status; will check. Laser Status: SysStat: Frontend online Output power is 36.2W High Power Oscillator offline. PMC: It has been locked 3 days 6 hours Reflected power is 2.8 Watts and PowerSum = 25.6 Watts. FSS: It has been locked 3 days 6 hours Threshold on transmitted photo-detector PD = 0.9 V ISS: The diffracted power is around 7.5 %
While trying to untrip the ETMY ISI through guardian the ISI stage 2 watchdogs tripped (again). JeffK suggested manually turning on the Gain filters for the GS-13 inputs (to reduce the analog gain by 10...or LOW GAIN mode), resetting the watchdogs again, then requesting Fully_Isolated from guardian.
if it is necessary to reduce the gain by hand, shouldn't guardian handle this?
> if it is necessary to reduce the gain by hand, shouldn't guardian handle this?
Yes it should, if it is determined that this is necessary to achieve full isolation. However, this wasn't previously necessary, so something in the system has clearly changed.
But either way, more information is needed. Did you try letting guardian handle the isolation with the default procedure more than once? If so, did it trip the GS13 in the same way every time? Presumably lowering the GS13 input gain did allow the isolation to succeed? Was there other activity going on around ETMY at the time? Have any other parameters of the system changed, such as cart bias offsets on any of the HPI or ISI dofs?
All good questions. Mostly I just wanted to get a trip report logged as a data point to see if this is happening with some frequency and not getting reported.
There was no other work going on at EY at the time and the seismic background was not particularly choppy. I did not let guardian try a second time before changing the gain. As for changes to the DOFs or bias, I don't know. Guess we'll just see if it happens again. Thanks.
Before Removal In Chamber 0.3 = 0 0.3 = 0 0.5 = 0 0.5 = 0 1.0 = 0 1.0 = 0 During Door Removal Breaking/Removing the bolts 0.3 = 168 0.5 = 78 1.0 = 30 Installing the Gasket Protectors In Chamber 0.3 = 230 0.3 = 130 0.5 = 150 0.5 = 50 1.0 = 90 1.0 = 20 Putting on the C3 Door Cover 0.3 = 410 0.5 = 260 1.0 = 130 After Removal In Chamber 0.3 = 0 0.3 = 0 0.5 = 0 0.5 = 0 1.0 = 0 1.0 = 0
This morning I went into BSC1 to re-resume work on the ITMy SUS. Particle counts taken this morning are as follows:
After repairing wall, in the beer garden
All zero
In BSC3 near flooring, before I entered
0.3um 70
0.5um 40
1.0um 20
In BSC3 near flooring, after wiping flooring and walking around a few minutes
0.3um 540
0.5um 330
1.0um 210
In BSC3 near flooring, just after I left the chamber
0.3um 270
0.5um 100
1.0um 80
I had to repair the false CR wall around the BSC3 door this morning because I found it had falled down sometime since last Wed. Note, if doing this type of false wall in the future, tape needs to be added perpendicular to the joint tape, to make reinforcing "stitches" across the sheet joints.
Dave noticed that the IOP software watchdog for EY was not active. We found that the watchdog had been tripped since ~11am last wednesday (7/2/14). The IO chassis had been restarted at that time but the IOP watchdog had not.
Jim, Jeff, Arnaud, Dave, Justin
The EY SUS system was not reactivated following the reboots due to loss of 24V-DC on the IO Chassis last Wednesday (2nd July).
Jim and I went to EY and found that the new SWWD DACKILL is not disabling the AI chassis like it used to, we have reported this to Rolf. Also the lower AI chassis was found powered down and when we tried to start it up its power switch tripped off. Looks like overcurrent on the 15V-DC line. We unplugged and tagged the AI Chassis. With Jeff and Arnaud we found the 5th DAC is for ETMY ESD drive, so they are going ahead with damping the ETMY and TMSY suspensions, sans ESD.
Pulling North door Ham 5
Replacing X-manifold spool
Building cleanroom over Y-arm spool, initiating first cleaning that area
Hartmann alignment complete for now
need HAM door covers from LLO
TCS AA chassis work
CPB ready to go, maybe some hardware needs
No visitors expected this week.
only h1fw0 restarts, there were 31 of them.
only h1fw0 restarts. 38 in total, see attached text file.
h1fw0 is unstable, but provided h1fw1 continues to be stable there is no data loss. LDAS are automatically archiving h1fw1's frames when they are unavailable from h1fw0. The default NDS is h1nds1 (which reads h1fw1's frames) so there is no discontinuity of data for NDS clients. The current uptime of h1fw0's full frames is 85%.
model restarts logged for Fri 04/Jul/2014
2014_07_04 03:14 h1fw0
2014_07_04 03:22 h1fw0
2014_07_04 03:30 h1fw0
2014_07_04 04:40 h1fw0
2014_07_04 05:38 h1fw0
2014_07_04 06:41 h1fw0
2014_07_04 07:09 h1fw0
2014_07_04 07:16 h1fw0
2014_07_04 07:32 h1fw0
2014_07_04 07:38 h1fw0
2014_07_04 08:25 h1fw0
2014_07_04 08:33 h1fw0
2014_07_04 09:18 h1fw0
2014_07_04 09:38 h1fw0
2014_07_04 10:07 h1fw0
2014_07_04 10:36 h1fw0
2014_07_04 12:32 h1fw0
2014_07_04 12:42 h1fw0
2014_07_04 13:13 h1fw0
2014_07_04 13:18 h1fw0
2014_07_04 13:23 h1fw0
2014_07_04 13:32 h1fw0
2014_07_04 13:39 h1fw0
2014_07_04 14:38 h1fw0
2014_07_04 15:36 h1fw0
2014_07_04 16:33 h1fw0
2014_07_04 17:30 h1fw0
2014_07_04 17:40 h1fw0
2014_07_04 18:40 h1fw0
2014_07_04 19:16 h1fw0
2014_07_04 19:41 h1fw0
2014_07_04 20:28 h1fw0
2014_07_04 20:38 h1fw0
2014_07_04 21:18 h1fw0
2014_07_04 21:18 h1fw0
2014_07_04 21:23 h1fw0
2014_07_04 21:29 h1fw0
2014_07_04 21:34 h1fw0
2014_07_04 21:34 h1fw0
2014_07_04 22:28 h1fw0
2014_07_04 22:34 h1fw0
2014_07_04 23:32 h1fw0
2014_07_04 23:37 h1fw0
2014_07_04 23:37 h1fw0
unexpected h1fw0 restarts. h1fw1 is stable, DAQ data is contiguous.
model restarts logged for Thu 03/Jul/2014
2014_07_03 04:30 h1fw0
2014_07_03 04:36 h1fw0
2014_07_03 11:31 h1fw0
2014_07_03 11:39 h1fw0
two pairs of unexpected restarts.
Matt H, Jason O, Aidan B, Thomas V
Aidan will write an alog regarding the alignment of the HWS optics in HAM4, this is more about the setup to do it.
We haven't been able to solve why the SR3 is pitched low and so I locked the face EQ stops of all three stages, then with Jason making sure the pointing of the HeNe of the total station was correct and that the beam splitter offsets were engaged and damping on, and Aidan standing at HAM4 directing me using the headsets, I altered the EQ stops on the optic of SR3 so as to steer the beam onto the center of SR2 optic (or as close as we could tell it was to center).
This was enough to allow the alignment of the HWS to begin. Just for curiosity we looked at how the beam was going from SR2 to SRM. Luckily we could see it and so we could steer the HeNe beam onto roughly the centre of SRM with ~1500 offset in pitch and ~1800 offset value in YAW on SR2 upper mass (note Jason seemed to think that the sign of which way the beam went up and down when he provided an offset was flipped. Maybe someone wants to look into that). So thats a good sign.
Note: The HWS optics were aligned WITHOUT any offsets applied to SR2.
Slight correction: +1500 offset in pitch, +800 offset in yaw to direct beam from SR2 to SRM.
And she's not even here today ..... PeterK, MichaelL, JeffB, RickS Betsy located some aluminum ClassA parts yesterday that we were able to use today to improvise some strain relief for the PSL ISS PD array cables in HAM2. Jeff and Michael were able to locate some PEEK cable ties (very handy) that we used to dress the cables to the improvised bracket (see attached photos). Peter is doing one final set of electrical tests now, after which we will consider the ISS PD installation complete (and successful).
After the last cable tie was added. All 8 photodiode electrical connections were checked. Both the lower middle left and lower right connections had to be reseated. Afterwards all diodes checked out okay. The dust particle monitor indicated zero counts for all sizes after the end of the check out.
This structure is likely to have resonances well below 150 Hz in the vertical direction, and may interfere with the Z, and probably RX and RY loops on the ISI. Please be careful when turning the ISI system back on, and watch the GS-13 signal for ring-ups. Some notching may be required on the loops.
