The DMT test box, h1dmt3, was patched and rebooted today at about 2 pm PDT. This should have no impact on the control room.
TITLE: 04/04 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
LOG:
14:39 (7:39) Tyler, Mark to EY
15:00 (8:00) Start of shift
15:15 (8:15) Bartlett to EX -- reset dust monitor #2
15:39 (8:39) Bartlett leaving EX
15:59 (8:59) Chris to EY -- delivering bolt
16:05 (9:05) Tyler, Mark back from EY
16:14 (9:14) Peter and Fil transitioning to laser safe
16:31 (9:31) Gerardo to EY -- vacuum work
18:14 (11:14) TVo, Sebastien, Dan, Alexei to LVEA
18:39 (11:39) Gerardo back from EY
19:02 (12:02) Gerardo to LVEA
19:29 (12:29) Fil to ISCT6 -- collect GIGE cameras
19:57 (12:57) TVo, Sebastien, Dan, Alexei out of LVEA
20:19 (13:19) TJ to HAM5 -- cleaning up
20:39 (13:39) Chandra, Tyler to LVEA -- craning work
20:43 (13:43) Gerardo to IP5
20:46 (13:46) Betsy to LVEA -- find something for Livingston
20:48 (13:48) Elizabeth to LVEA
21:02 (14:02) Jason to PSL enclosure -- grab materials
21:03 (14:03) Betsy out of LVEA
21:20 (14:20) TJ out from HAM5
21:29 (14:29) Jason out of PSL enclosure
21:37 (14:37) Elizabeth out of LVEA
22:01 (15:01) Betsy to LVEA -- investigate HAM5 HEPI
22:26 (15:26) Tyler out of LVEA
22:38 (15:38) Mark out of LVEA -- finished moving forklift
23:00 (16:00) End of shift
I spend most of the day taking transfer functions of the ETMY main and reaction chains intermittant with my other crazy business. Kissel took over after I exported all of the data but got a flag during the matlab processing of it and had wandered off with my patience.
Things look good with the plots now (as hinted via the quick looks at closeout yesterday), see attached.
Kissel has committed the new data to the SVN repository. Data can be found at the usual Data or Results directories at
/ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ETMY/SAG*/
FAMIS 6569
Added 70 mL to crystal chiller.
FAMIS 6944
Reported ETMX frequency noise as being high.
Started venting vertex this morning and spun up turbos on XBM and YBM. Looks like IP1 isn't going to make it - its isolation GV is probably leaking. The new GV on IP4 is sealing great!
Turned IP1 off.
another one bites the dust. i hear there's room in the dumpster...
There are very few more satisfying feelings.
Peter is transitioning the LVEA to laser safe.
Dan B, Terra H. Alexei C., Seb N, TVo
We attempted to try to characterize the SR3 RoC heater's modematching range by mode scanning the OMC. However, we had trouble getting the OMC alignment loops to close. Even though the alignment on the QPDs using OM1 and OM2 were relatively close to the loop offsets to start, the OMC SUS would rail and push the beam off of the QPDs. We've had this problem before but we couldn't figure out what the issue was this time around. Although we got flashes in the OMC, the misalignment was not good enough to get a proper measurement so we'll have to try again some other time.
FYI: For the upcoming vent, we've turned off the SR3 driver and left the IMC locked with 2.5 W input. Also, a lot of the digital cameras weren't loading for some reason, even after requesting a reboot.
It looks like the fast shutter closed at around 5:30 UTC last night, which would make it impossible to close OMC QPD or AS centering loops.
I agree, but there was still light on the QPDs even after the fast shutter said it was "closed". So that makes me think that it was still actually open. This seems very odd to me. Keita's alog here shows some step-by-step instructions on how to use the shutter but I still don't fully understand the logic.
Mark D. & Tyler
The old IP11 isolation GV was removed this morning and replaced with new valve, and the first (SN1) chevron baffle was installed along with a rebuilt IP11.
IP11 was tested prior to installation. At 5000 V each channel measured ~ 2 uA.
Gerardo relocated an empty conduit attached to cable tray to clear the handle of GV actuator.
We're replaced a 1" pico high reflector and a black glass behind with non-pico version in OMCR path. PSL beam was not available so no alignment.
We removed the following components from HAM6 (refer to D1000342):
We found that the black glass dump had some fogging on one of the two panels. Photos to follow.
Yesterday Terry, Nutsinee and I also prepared for tomorow's in chamber work by settings the apertures in their original places on the squeezer path, and aligning the beam produced by scanning the OPO through the apertures. We then moved the apertures out of the way.
1st attachment shows before the change. Green is uninstalled, red is replaced.
2nd is after.
3rd, 4th. Fogging apparent for left panel of the black glass V dump. The difference between these two is that I'm illuminating different part of the panel using a green flashlight.
5th. Right panel under the similar lighting. The fogging is much less severe.
6th, 7th. Outer side of the left panel also has fogging.
Note that I was able to wipe this off easily using a dry Vectra Alpha wipe, it didn't need any force, just wipe and it's off. I only wiped off the left 1/4 of the inside of the left panel that looks foggy in picture 4.
The dump is on the flow bench in the cleaning area next to optics lab in OSB, if somebody wants to inspect.
This afternoon, Travis and I pulled the First Contact on the ETMY HR surface. WE measured charge via the standard procedure at the back of the AERM before and after. We had a hard time blowing with 10-20psi DI N2 to reduce the charge originally at ~12V to under 3V. More detail on this in attached alog shortly.
AFter we were satisfied with the final "dis"charged state, we then set the lower earthquake stops/lock nuts on the ETMY, and pulled the ACB (arm cavity baffle) back down into it's nominal position. I noticed however that the ACB felt like it was rubbing on something when I bounced it vertically. Inspection revealed that one of the earthquake (EQ) stop bars D1201235 was rubbing the down tube in the roll direction. I moved weights around on the top of the box in an attempt to free it, however I ran out of range. Either this unit has been rubbing for a while, unnoticed, or sometime during this last few months of vent work we jostled it enough to twist something like the flexture, blade, down tube shaft, or box. In consult with Calum and Jeff K, the consensus was to just remove this EQ stop bar since it only constrains the ACB in the less critical roll and yaw motion which have other mechanical backup restraints. Of course removing the long bar proved difficult because it was trapped between the unit and the chamber wall. Travis was able to convince it to come out via bending it's tip.
Will file an FRS for this to be investigated further when we have more time/people power than today's closeout mustered up.
After Jim unlocked the ISI, Travis cleared the chamber of tools/stools/CC supplies. Note, we did not pull any of the freshly placed 3" or 1" samples in this chamber left during closeout just a few weeks ago - all CC kits had already been pulled and I could not organize to get help with this.
Travis and I have been running TFs on the main and reaction chains of ETMY and things look good. We are good to put the door on tomorrow morning asap. (Note, Mark D and Tyler have it hanging on the engine hosit ready to go.)
Picture of EQ bar that was rubbing before removal, and picture of ACB from beam view down tube for overview.
Hand-held electrometer readings at back of ETMY QUAD (AERM back surface), mounted in the center, UL and LR locations:
| Zeroed, before FC pull | repeat meas, before FC pull | zero check, then reset to 0 | After FC pull | zero check, then rest to 0 | more DI N2 blow, 20psi | zero check, then reset to 0 | More blow, final charge after ~2 mins | zero check | |
| UL | 5.9v | 10.8v | 8.8v | 6.0v | 1.8v | ||||
| CNTR | 5.0v | 9.8v | 20v | 6.8v | 3.4v | ||||
| LR | 10.2v | 10.8v | 12v | 19v | 2.0v | ||||
| CAP ON | 5v | 3.5v | 5.8v | 0.2v |
Picture of ETMY unused, broken Ring Heater temp probe, stowed under optic on structure.
A few more pics of the lifted ESD strain relief on the top of the ETMY AERM mass, FRS 10181.
Particle counts, measured with hand held unit just inside the chamber, a few times throughout these 2 closeout days were 0-30 for all sizes measured between 0.3-1.0microns.
This morning, Travis and I checked the ETMY suspension health and then made the pitch adjustments needed to compensate for the addition of the AMD devices to the front of the mass last week. Like what was reported at LLO, roughly 200 uRad (up) of realignment was needed to recenter on the optical lever. A few rounds of TFs showed that the suspension was still free of mechanical interferences, and OSEM speed dials looked good.
We then locked the test mass, swung the ACB back, attached the First Contact spray cone, and sprayed an application of the solution to the ETMY HR. Per procedure, we removed the cone and reinforced the edge of the applied sheet with brush-on First Contact. It now dries until tomorrow morning. So, no oplev or pcal beams will be of use over night.
VE intends to work on the IP port near this chamber this afternoon.
Travis painting First Contact around edge of ETMY-HR below.
Between yesterday and today, Gerardo and I successfully bonded the ears to core optic mass ETM15, destined for LLO for post-O1 eventual replacement.
Ear s/n 195 bonded to S3 flat of mass June 29, 2016
Ear s/n 196 bonded to S4 flat of mass June 30, 2016
The first ear (s/n 195) has a series of bubbles along it's edge, but the surface area of these do not add up to more than the allowed amount as per E1000277, so it passes, see pix attached.
The second ear (s/n 196) has no bubbles and is nice full bond.
Inspection of the bonds this morning showed no change to the nice S4/Ear surface bond.
The small edge bubbles along the S3 Ear have migrated a bit (not worse, just moved a bit). Therefore, we decided to rewet the edge with solution to see if it would wick in and close some of the bubbles. This worked to close one of the larger bubbles, but one bubble continued to morph so we'll reinspect Monday. Note, none of the sizes of the bubbles got bigger, so the surface area of the bubble total remains the same and below spec.
Attached is a picture of what the bubbles in the ETM15 S3 Ear bond look like today (recall, it was bonded last Wed so it has now been over 5 days since initial bond). Apparently over the weekend, the bubbles ran inbound a bit further. I estimate the surface are of the bubbles to be near 20mm sq., still under the 50mm sq. spec. E1000278, although it isn't pretty. I measured the longest streaks to be almost 3mm long, with a width of 0.4mm. There are no bubbles inward from the edge near the center - anything shown in the picture is a camera reflection.
The S4 Ear bond looks unchanged from inspection last week, very good bond, very little bubbles.
Pictures of this ear bond taken by Danny at LLO just before use at LLO, indicate that the bubbles have not changed shape or size since the picture attached July 2016. Phew, said both Gerardo and I.
