After the cable replacement on HAM5 as BWeaver noted, I consolidated weights on a few corners where needed. This and the re-cabling with a few more clamps added resulted in some changes to the counter weights. But it all balances nicely now and I'll update the weight plan shortly. I left it locked for SUS to continue and will unlock when needed.
Since Hugh had done some cable lacing on the ISI during yesterday's payloading exercise, Fil wanted to check the grounding on HAM5 again. Of course, he found issues with ZM2. Hugh, Richard, Fil, and I embarked on quite a bit of troubleshooting whereby we ended up replacing the entire D1000225 (SRS) and D1000234 (quadrapus) cables from ZM2 to the feedthru. It turned out that the SRS cable had a bad end at the feedthru, and the quadrapus was fussy at one or more BOSEM connections. We think that the grounding checks yesterday were actually null because during the troubleshooting, we discovered a few connections that hadn't had their fasteners secured in this chain yet. It seems the ZM2 is everyone's problem, therefore it is no one's problem.
Meanwhile, Travis climbed into the HAM5 Table West tube section, removed baffles (again), locked the SR3 and SRM and painted FC on their HR surfaces. We replaced the baffles (which have to come off again in order to pull the FC) so that Hugh could recheck the ISI balance, which he is doing now.
Travis and I will head back in shortly to finish the FC and cleanup work - hopefully doors will go on this aft.
I took JeffK's recent B&K data for SR2 and plotted it against Arnaud's data from 2014 (alog 12089). Jeff's measurement is very different from what Arnaud found. There is a new resonance at 50 hz in both degrees of freedom that is sharper than any of the resonances from the 2014 measurement. Talking to Jeff and looking at Arnaud's setup, it looks like the sensors were in different spots, but the strike locations were the same. It also seems that my tfs on HAM4 on Nov 8th show this some, second attached image is the gs13 cartesian tfs from that measurement. The 50hz feature shows up most in the rotational dofs, but is pretty small. I don't think it's hepi, because the other chambers don't see a similar feature. Not sure if this will be an issue for the ISI controls yet, but probably not. Jeff also suggested SR2 was locked for this measurement, so I'll try a shorter set of tfs tonight before I leave, if the LVEA gets quiet.
TITLE: 12/08 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
Wind: 2mph Gusts, 1mph 5min avg
Primary useism: 0.02 μm/s
Secondary useism: 0.40 μm/s
QUICK SUMMARY:
15:07 Vanessa and Karen into LVEA
15:29 Mark and Tyler into LVEA HAM5 (doors)
15:30 lost comms w/EX HEPI pump controller
Hugh walked me through the instructions in the wiki for restarting the end X HEPI EPICS IOC and recovering the PID.
J. Kissel Took Doors ON, but still at-air transfer functions of SR2. Data looks clean and clear. Well done team! First Chamber closed! Data lives here: /ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/SR2/SAGM1/Data/ 2017-12-08_0102_H1SUSSR2_M1_WhiteNoise_L_0p01to50Hz.xml 2017-12-08_0102_H1SUSSR2_M1_WhiteNoise_P_0p01to50Hz.xml 2017-12-08_0102_H1SUSSR2_M1_WhiteNoise_R_0p01to50Hz.xml 2017-12-08_0102_H1SUSSR2_M1_WhiteNoise_T_0p01to50Hz.xml 2017-12-08_0102_H1SUSSR2_M1_WhiteNoise_V_0p01to50Hz.xml 2017-12-08_0102_H1SUSSR2_M1_WhiteNoise_Y_0p01to50Hz.xml I post a teaser of the raw Pitch to Pitch top mass (M1) transfer function for proof.
J. Oberling, T. Shaffer, T. Sadecki, B. Weaver, A. Brooks (remote support)
Today we completed the initial alignment of the TCS tables (after Greg placed them in their new positions last week) to their respective in-vacuum mirrors. Both tables were aligned via the following steps:
That being said, it wasn't that easy. Both alignment lasers needed to be realigned to the irises. In fact, the alignment laser for the TCSy table needed to be installed before it was aligned. The real problems, however, came when attempting to align the beam through the ZnSe viewport and onto the 1st in-vacuum mirror. Regardless of how we adjusted the periscope mirrors, we always ran out of range before we could center the beam on the viewport and the 1st in-vacuum mirror. The top periscope mirror (TPM) is bolted to a plate, that then bolts to the periscope structure itself via slots in the plate; this plate can therefore be moved up and down on the periscope structure (the drawing for the periscope assemble lives at D1200953). We tried moving the TPM up and down, but regardless of its position on the periscope structure, we always ran out of adjustment range before the beam was aligned. The problem is due to an apparent design flaw in the plate. The plate holds the TPM at a fixed angle, and this angle is apparently not the correct angle for properly aligning the beam. In order to center the beam on the ZnSe viewport and the 1st in-vacuum mirror, we had to remove all the screws from the TPM plate except for one, rotate the plate on the periscope structure, and secure it with whatever screws lined up. This was necessary for both TCSx and TCSy. TJ has pictures of the results that he will post as a comment to this alog. Long story short, the TCSx TPM is now held on by 2 screws and 1 dog clamp, while the TCSy TPM is held on by 1 screw and 1 dog clamp. We are not in love with this solution, but it was the only way we could align the beam to both the ZnSe viewport and the 1st in-vacuum mirror. We emailed Aidan about this and he informed us this was not too surprising due to the table being further away from the chamber.
Once we had the beam in-vacuum, Travis and I entered the chamber and, with TJ assisting from the outside, we aligned each beam to its respective CP. The alignment from the 1st to the 2nd in-vacuum mirror was trivial, but adjusting the 2nd in-vacuum mirror to align the beam onto the CP was very difficult. The mirror has 8 screws that are arranged in what appears to be a pattern that allows for push-pull adjustment of the mirror alignment, but in reality that doesn't work at all. All the screws screw directly into the mirror, so there is no push-pull. The only way we could reliably align this mirror was to loosen all the screws, and then slowly re-tighten them one at a time in such a way that the beam remained centered on the CP. This was made difficult by the fact that tightening/loosening each screw had a counter-intuitive effect on the beam alignment; i.e. we would tighten a screw on the right side of the optic expecting the beam to move right (since we're pulling the mirror in that direction) but it was a toss-up as to whether the beam would go right, left, or just not move at all. After several iterations of tightening and loosening screws we finally got the beams aligned to the center of their respective CPs. This completes the initial alignment of the TCS tables to their in-vacuum mirrors; a fine alignment will be done once the HWS table is re-installed and aligned and the CO2 lasers are hooked up and running again (the HWS is used to image the heating provided by the CO2 lasers, and the TCS TPMs are then adjusted to center the CO2 beam on the CP).
TCSY & TCSX top periscope mirror mount pictures are attached.
Hugh & Brijesh
We finally got the ISI unlocked after letting OFI crew remove a final iris and securing the new OFI OSEM cables. The unlock was very difficult as the payload was very light. Ultimately we had to move a 10kg mass from the edge of the table top to the center and then still add almost all the additional payload I had available in the LVEA. Finally though, we got it well balanced and the lockers of course are much easier now.
We left the covers pulled out and JimW has already started the long TFs to run overnight.
In the morning, I will consolidate a few masses and document the new payload for SYS As-Built.
J. Kissel, J. Warner
Jim and I hammered components in HAM2 this morning, including:
- IMs 1-4 with Baffles re-installed with Viton (LHO aLOG 39654)
- PRM Cage (hammering the cage instead of the baffles)
- PR3 Cage (hammering the cage instead of the baffles)
- All three HAM table baffles (Minus Y, Middle, and Plus Y)
- PR3 Table Top Baffle
Pictures attached, analysis to-come.
J. Kissel, T. Sadecki We've closed out B&K hammering of BSC2 today by grabbing transfer functions of the ITM elliptical baffles (D1101806) and the Beam Splitter Cage and elliptical baffles (D1200750). Picture of setup attached. Results to be processed and posted later. Measurement Notes: - For the ITM elliptical baffles (which were freely suspended during measurement), we attached the accelerometer to the inner-most thru-hole on the bottom plate. - For the BS Cage, the accelerometer position shown in 5468 seemed no longer available at the time (though now looking at pictures, it was), so we went for using the thru-hole in the center of the structure as pictured. - To reach BSC2, we extended the manufacturer's hammer and accelerometer cables with newly constructed 20 ft. cables courtesy of Richard and Filiberto (THANKS Y'ALL!).
This afternoon I
- maked the First Contact spray solution
- brushed up on the spray procedure
- staged supplies near door
- donned the PPE
- aligned the cone to seal onto the ITMY HR surface
- sprayed the ITMY HR
- removed the cone.
Tomorrow I will finish reinforcing the outer ring of the coating and add the pull tab.
Betsy, Travis, bit of Kissel, Bubba/Tyler/Mark
Already eluded to in previous alogs, but HAM4 has been closed. The usual steps were taken:
- ~9:30am Lay/mount 3' witness wafers
- Wipe table and ISI reachable surfaces
- Pull FC previous painted on SR2 and HWS DCBSx and DCBSy
- Unlock SR2 SUS and lock down nuts
- Checklist E1201035 checked throughout this to check for tools, dust counts, etc.
10:50am Dust counts at S door during this activity with Travis and I near the door were:
0.3u 80
0.5u 40
0.7u 0
1.0u 30
- Run quick 6 DOFs of SUS (some troubleshooting needed - cables recheck by Fil OK, BIO state needed switching, vertical stops needed resetting since apparently rattled down during 5mm slide, TFs finally pass)
- Unlock ISI
- SEI discuss and quick medm check ISI, pass
- Hunt down the Signoff sheet on DCC, then found it to be out of date, spent 30mins hunting people down - people either weren't the appropriate people to sign, or were on travel. Vern is updating sheet and reprinting for future chambers.
- Doors attached ~12-1.
TITLE: 12/07 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:
LOG:
16:00 LVEA is LASER SAFE
16:01 Christina and Karen are in the LVEA
16:27 Tyler and Mark out to MY
16:35 Fil and Jeff B out to HAM2 for ground loop checking/repair
16:36 Terry going into the squeezer bay
16:51 Betsy out to HAM 4/5 area to prepare for putting doors back on.
16:52 Chandra out to GV4. Will possibly be using the W Crane
16:54 Tyler and Mark are back
17:01 Travis out to HAM4 area for door closure
17:07 Peter out to LVEA
17:08 Dr Stefan Balmer on site
17:09 Christina and Karen out of the LVEA
17:13 Peter out
17:28 Chandra out (temporarily)
17:34 Mark and Tyler going into LVEA to crane HAM doors to a staging area for afternoon installation
17:41 Jim and Jeff K out to HAM 2 to B&K hammer
17:46 Chandra into LVEA
17:51 TJ heading out to LVEA/TCSX.
17:54 Fil and Jeff finished with HAM2. Fil moving to ITMs to continue ground loop checks.
17:57 Re-aligned/damped all HAM2 suspensions
17:59 Bubba into LVEA for crane/door work
18:06 Peter and Umakant out to PSL enclosure
18:15 printed out dign-off sheet for door activity for Betsy and co.
18:29 Richard out to LVEA
18:20 TJ out
18:21 N in to squeezer bay
10:26 Fil and TJ into the LVEA
10:35 Richard out
10:51 Mark and Tytler out
18:59 Took HAM5 suspensions to SAFE/UNDAMPED for Fil and Jeff B ground loop checking
19:03 Dave B and Arnab going to out buildings
19:07 Mark and Tyler back into LVEA
19:08 Brijesh out to Output arm area to observe
19:10 Vern out to LVEA (no-op)
19:14 Siddesh out to LVEA(no-op?)
19:15 Terry out of LVEA (no-op)
19:24 Mark in and out of LVEA to deliver canned air to Jeff K at HAM2
19:32 Dave B and Arnab at EY
19:32 Richard out to LVEA
19:38 Richard out
19:45 Betsy out
19:49 Travis out
19:52 Jason and TJ are out
19:57 Dave B and co. checked in from MX
19:57 Peter and Umakant out
19:59 Jeff K and Jim out
20:08 Mark, Tyler, Bubba, and Siddesh out for lunch
20:09 HAM4 N Door tacked on
20:13 Dave B checked in from EX
20:30 Fil out
20:34 Jeff B out
20:36 Dave and Arnab back
20:39 N out for lunch (no-op)
20:52 Travis and Jeff back out
20:59 Hugh out to HAM5 for ISI balancing
13:00 Vent Meeting
21:05 Tyler, Mark and Bubba out to LVEA
22:07 Sheila into Optics lab
21:10 TJ and Jason back out to LVEA
21:20 Fil out to LVEA
21:24 Jeff B in with Fil
21:39 Gerardo into LVEA (no-op)
21:53 Betsy into LVEA
21:54 N into squeezer bay
22:07 Jeff B and Fil out
22:09 N card showed undeclared
22:13 Bubba out
22:19 Gerardo out
22:24 Richard into LVEA
22:30 Richard out
22:39 Jeff K out
22:56 Chandra into LVEA
22:57 Tyler and Mark out
22:58 Terry back out to squeezer bay
23:14 Cheryl out to HAM2 to investigate IM3
23:15 Jeff K into LVEA to take pics at HAM3
22:17 Jeff K out
23:25 Dave B out to HAM5 to deliver a laptop to Hugh
23:39 Bubba and Bailey into the LVEA
23:47 Jason and TJ out
23:49 Chandra out
23:58 Cheryl out
Pumping HAM 4 annuli with aux cart #5 and hung turbo. Started at 3:39pm local. After 10 minutes of pumping, CC gauge reads 4.3e-4 Torr.
5pm local: 1.0e-4 Torr
Dec. 8th: pressure 7.8e-6 Torr at noon
3:30pm local: 7.2e-6 Torr
I spoke with the manufacture of the failed water heater this morning. The factory rep indicated to me that if the failure is with the heat exchanger, which I believe to be the case, that it is covered under warranty. I have removed the heater, packaged it, and shipped it back to them in Florida for inspection and repair.
Ground loop checks for SUS have been completed for the following HAM's:
HAM2, HAM3, HAM4, HAM5, and HAM6.
Multiple shorts to ground chamber were found and addressed. Many cables required the in-vacuum cables to be disconnected at the flange and re-seated. See alog 12528 for similar issues of four screws touching the feed-thru if not recessed completely.
HAM 3 gave us the most difficulties. In-chamber shorts were found at one of the table brackets. We also suspect air-side cables SUS-3 and SUS-26 to be faulty. To convince ourselves we had no grounding shorts in-chamber we disconnected the following air-side cables and tested directly at the air-side feed-thru: cables SUS-3, SUS-2, SUS-25, and SUS-26.
Same was seen on HAM5 for cable SUS-20.
Testing of OFI and SQZ ZM(tip-tilts) all passed.
TCS temperature sensor - Read about 110 ohms on pins 1/2 and 14/15 which does not agree to drawing. According to D1102257, two sets of RTD's should be seen on pins 2/3 and 14/15 and on pins 12/13 and 24/25.
Shorts were also found in the BSC chambers that still need to be looked at:
ITMX - SUS-42, SUS-57
ITMY - SUS-9, SUS-17
BS - SUS-81, SUS-82
Please note that moving cables in-chamber can produce shorts. Please use caution when doing final closeout activities.
Translating which BSC SUS cables correspond to which, from D1100022, ITMX - SUS-42 = M0 LF RT, R0 LF RT OSEMs' signal chain, from vacuum flange to field sat amp SUS-57 = L2/PUM UL LL UR LR OSEMs' signal chain, from vacuum flange to field sat amp ITMY - SUS-9 = Reaction Chain's (R0) F1 F2 F3 SD OSEMs' signal chain, from the vacuum flange to the field sat amp SUS-17 = L2/PUM UL LL UR LR OSEMs' signal chain, from vacuum flange to field sat amp BS - SUS-81 = M1 F1 F2 F3 LF OSEMs' signal chain, from vacuum flange to field sat amp SUS-82 = M1 RT SD OSEMs' signal chain, from vacuum flange to sat amp
Bubba, Mark Dodson, Tyler Guidry We installed both HAM 4 doors today and tightened door bolts. I informed Chandra and Kyle.
I checked the alignments of the IMs since I finished working yesterday, and found that IM1, IM2, and IM4 recoverd their alignments when restored this morning, but IM3 did not, it has a significant change in alignment in pitch and yaw.
IM3 change in pitch is ~-1000urad, and change in yaw is ~-1500urad, however the alignment sliders are at (0,0), and have been since yesterday, so there's no apparent reason for the change.
My investigation into IM3 found the source of the change in alignment. Set screws on the upper OSEMs and bolts on one blade assembly were not tightened to the same spec that I'm using during this vent (to correct the torque of all of the bolts in the IM towers).
These are easily identified as bolts that were loosened for the recent bias relief and wire shift on IM3, so mystery solved.
Before correcting the bolt torque, I tapped the IM3 tower and the IM3 OSEMs/blade spring shifted, changing the optic alignment.
Bolt/set screw torques were corrected, however the OSEMs still need to be recentered, which will happen tomorrow.
These shifts were actually due to the 4 bolts that hold the top plate of the IM cage to the rest of the IM cage, which are hidden under the blade spring EQ stop brackets, so have not yet been torqued to spec. While a few incidental set screws and bolts were not quite torqued to spec in other areas on the IM cage, as I noted in my comment, those were not actually the cause of the shifts. The root cause of the shifts are the 4 hidden loose bolts that are allowing the entire top plate of the IM cages to move, altering the IM alignment.