Condition of chambers was documented. HAM4 Support Tubes and bellows were inspected then bellows were vacuumed and the support tubes "picked". Support tubes will be wrapped and bellows protection installed.
Joe D. and Jodi re-cleaned the two high quality viewports from the south door. Cheryl inspected them and they are ready for re-installation. The crew finished pulling the iLIGO flooring and installed the aLIGO flooring that is electropolished and qualified for UHV service. In removing the remainder of the iLIGO flooring this morning, Mark L. came upon a mystery: two unexpected holes in the longest plank of the flooring. Attached please see some pix. As you can see from the size discrepancy, these are not the normal holes for BSC flooring. All LIGO-ites questioned deny drilling/tapping the holes. For now, we will chalk it up to the "little green men from outer space" but it is not comforting to have holes appear in structures without any notice or agreement. >-(
There were some dust monitor alarms triggered during the night in the End-Y VEA. The attached plot shows there were elevated levels of dust counts that are coherent with increased wind speeds. This suggests spurious wind currents leaking into the VEA could cause dust particles to swirl around, increasing the dust count levels.
I, Alberto and MichaelL unmounted the eLIGO L1 OMC (that was used for H1 squeezing experiment) from the optics cart in the H2 PSL ante-room and moved it to the H2 PSL table. The OMC was dogged down and wrapped by foils.
The cart was moved to the outside and put in a clean room near by.
FYI another eLIGO OMC (original H1 OMC) is in a protective cage in a shipment box in the optics lab.
Pumping was stopped overnight, system is not designed to run unattended, will restart early tomorrow. Pressure at 1.74 torr.
Rolf, Dave, Richard, Jim, we started construction of the new LHO DAQ Test Stand (DTS). It is denoted as a X1 system. It is being installed in the H2 EE building on the AC power side (repurposing two DC power supply racks). Currently we are installing the boot machine, network, NAT router, timing fanout, IRIG-B, DAQ data concentrator and one front end.
We tested that the H1 PSL PMC model is able to remotely close the shutter by sending an EPICS command to the Beckhoff IOP/OPC. This feature did not work for the H2 PSL when it was running an earlier version of RCG. We (LHO CDS) would prefer that this communication be via a dedicated cable rather than relying on the ethernet network.
Jim, Corey, Hugo
The shipment #3759 from LLO contained:
They were all huddle tested, and validated. Spectra are attached.
3 of these 5 hortizontal GS13s were installed on HAM-ISI Unit #5, to replace the non-validated testing pods (aLog #2843)
The vertical GS13s will be installed on HAM-ISI Unit #6 which is currently being assembled.
- door went on BSC8 - dust counts spiked during the activity, but no more than would be expected - lots of activity at BSC6: viewports removed for cleaning, aLigo flooring installed, other work inside the chamber - during the safety meeting, the dust monitor at EY, that's in the clean room with BSC6, had numerous spikes in the dust counts, but it's not clear what activity is going on at the time - end of the day: Filiberto at EY Gerardo put in a work permit for pumping on H2 ITMY tomorrow
The attached plot gives decent coherence for only one OSEM drive to the other L2 OSEM responses. The responses are not completely coherent with the driven OSEM. Drive parameters are not known well-enough at this stage to result in good coherence with only a few hours of drive paramter tuning. The actuation and response measurements at this stage do not impact the scheduling of the BSC8 chamber close-out, but further testing could reveal discrepancies in OSEM signals.
Note, I am keeping the updates to the BSC6 in-camber task list at the following entry:
https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=2848
The two "dirty" custom viewports were removed from the south door and delivered to the VPW for re-cleaning. Half of the iLIGO flooring was removed from the chamber and prepared for transport to the corner before the crew pulled off for safety meeting.
The remainder of viewports, cameras, illuminators, etc. were removed from BSC2. The iLIGO flooring was retrieved from BSC6 for use in BSC2.
Randy and crew replaced the door on BSC8. It needs to be torqued down and that will happen immediately after lunch.
Hugh, Jim, Corey, Hugo
Spectra for the GS13s and the CPSs were taken on the ISI in locked state.
A procedure and a report are being gathered for this phase of testing.
Today, we started to work on HEPI-BSC6. Some basic tests were performed:
- Spectra: Sensors look good
- Static Test (Actuators are working). We swapped Actuator cables (Pier 2 <=> Pier 4). The cable labels have not been changed. Will be done tomorrow.
- Range of motion (range of +/-0.8mm). Stops were initially touching the boots in the horizontal direction (negative drive) in corner 1 and 3.
- Linearity test (Linearity + stops): Ok
Transfer functions will be measured on Wednesday.
(Betsy, Travis) After Richard/Filiberto fixed the broken ITMy L2 OSEM signal (swapping a board), and we confirmed that actuation was evident on the appropriate channels, we went in and finished the last items in BSC8: - Set M0 and R0 Left and Right Top Stage BOSEMs, and M0 PUM and EMTy barrel EQ stops, to account for buoyancy. - Took photos. - Removed all tools, stools and did once-over on chamber "cubbies" looking for hidden treasures. - N2 blowoff of optics (still see surface particulate on surfaces of the 10-20 particles/sq. in. level. Blowing did little to reduce this number. Hmmph. (Note, the FC had been removed early last week and the optic surfaces have been exposed since while unexpected diagnostics took place the last few days.) -Set witness plates. We're hoping Garcia can collect a final L2 TF set in the morning, but we see no reason not to shut the door to this chamber.
The "making sure actuation was on the appropriate channels" was not completely confirmed - a quick DTT test in the control room merely showed we could create a sine wave on a channel and readout a signal from the auxiliary ("_*VOLTMON_*") channels. The attached plot shows we can drive in one OSEM but see better coherence in another OSEM (but not completely coherent). This does not confirm that we are driving the pins that correspond to the MEDM channel names. The MEDMs may be correct in driving the correct pin outs, but the response signal could possibly be crossed.
To summarize: Yes, there is the ability drive channels and see a response, but whether that corresponds to reality (the wiring diagram D1001725) is not completely confirmed as of today.
Following is the list of items that need to be completed (in roughly the order below) before we can close this chamber. Some of the items have been finished and are still on the list as markers for redlining the installation procedure. Please add a comment if I have missed any steps 1) Electrical grounding checks - DONE 2) IAS SEI alignment complete, ISI & HEPI floating - DONE 3) IAS ETMy alignment Round 1 - DONE 4) TMS alignment - DONE 5) ESD continuity check 6) Clamp ETMy EQ stops 7) Reapply FirstContact to ETMy-HR and ERM-AR 8) Swap Flooring - Waiting for FTIR on new set, can slip down list but not beyond 14a. 9) Viewport in-situ cleaning (or swap if deemed necessary) 10) TMS OSEM alignment 11) Close the ring heater and set fiber guard to "nominal" position 12) Unlock ETMy, remove all TFE except TM line stops, and physically check for rubbing as per T1200213 (still drafting) 13) ETMy BOSEM alignment, factoring in buoyancy as per T1100616 14a) ETMy testing (See Phase 3a G1100693) 14b) IAS ETMy alignment again (if testing showed interference and suspension was adjusted to fix) 15) Repeat step 14 until all Phase 3a testing is complete - usually done in 3 rounds in order to clear all issues. Note, IAS requires removal of ETMy-HR FC completely. 16) TMS alignment check if needed 17) Lock down flooring nuts if loose 18) Set all EQ stops as per M1100256 19) Final FirstContact cleaning if needed 20) Remove TM line stops 21) Take pictures and count number of PEEK clamps 22) Set witness plates 23) Remove all tools Shut the doors.
The good news is we're working down the list. The bad news is, I added a few more items to the list. Edited to reflect actual order:
1) Electrical grounding checks (moved down the list since it was DONE on the test stand, not on the chamber)
2) IAS SEI alignment complete, ISI & HEPI floating - DONE
3) IAS ETMy alignment Round 1 - DONE
4) TMS alignment - DONE
5) TMS OSEM alignment - moved up list since DONE
6) ESD continuity check
7) Clamp ETMy EQ stops - DONE
8) Reapply FirstContact to ETMy-HR and ERM-AR - (did not so ETM-HR since sheet was still somewhat intact) DONE
9) Swap Flooring - Waiting for FTIR on new set, can slip down list but not beyond 14a.
10) Viewport in-situ cleaning (or swap if deemed necessary)
11) SEI Electrical grounding checks
12) SUS Electrical grounding checks
13) Close the ring heater and set fiber guard to "nominal" position
14) Unlock ETMy, remove all TFE except TM line stops, and physically check for rubbing as per T1200213 (still drafting)
15) ETMy BOSEM alignment, factoring in buoyancy as per T1100616
16a) ETMy testing (See Phase 3a G1100693)
16b) IAS ETMy alignment again (if testing showed interference and suspension was adjusted to fix)
17) Repeat step 16 until all Phase 3a testing is complete - usually done in 3 rounds in order to clear all issues. Note, IAS requires removal of ETMy-HR FC completely.
18) TMS alignment check if needed
19) Lock down flooring nuts if loose
20) Set all EQ stops as per M1100256
21) Final FirstContact cleaning if needed
22) Remove TM line stops
23) Take pictures and count number of PEEK clamps
24) Set witness plates
25) Remove all tools
Shut the doors.
Update to closeout checklist:
1) Electrical grounding checks (moved down the list since it was DONE on the test stand, not on the chamber)
2) IAS SEI alignment complete, ISI & HEPI floating - DONE
3) IAS ETMy alignment Round 1 - DONE
4) TMS alignment - DONE
5) TMS OSEM alignment - moved up list since DONE
6) ESD continuity check
7) Clamp ETMy EQ stops - DONE
8) Reapply FirstContact to ETMy-HR and ERM-AR - (did not so ETM-HR since sheet was still somewhat intact) DONE
9) Swap Flooring - Waiting for FTIR on new set, can slip down list but not beyond 14a. DONE
10) Viewport in-situ cleaning (or swap if deemed necessary) IN PROCESS
11) SEI Electrical grounding checks
12) SUS Electrical grounding checks
13) Close the ring heater and set fiber guard to "nominal" position
14) Unlock ETMy, remove all TFE except TM line stops, and physically check for rubbing as per T1200213 (still drafting) DONE (PenRe has be relocked due to flag repair) Also, 1/4-20 x 3/4" vented screws installed for sleeve (these were overlooked in the making of this list).
15) ETMy BOSEM alignment, factoring in buoyancy as per T1100616
16a) ETMy testing (See Phase 3a G1100693)
16b) IAS ETMy alignment again (if testing showed interference and suspension was adjusted to fix)
17) Repeat step 16 until all Phase 3a testing is complete - usually done in 3 rounds in order to clear all issues. Note, IAS requires removal of ETMy-HR FC completely.
18) TMS alignment check if needed
19) Lock down flooring nuts if loose
20) Set all EQ stops as per M1100256
21) Final FirstContact cleaning if needed
22) Remove TM line stops
23) Take pictures and count number of PEEK clamps
24) Set witness plates
25) Remove all tools
Shut the doors.
Update to closeout checklist:
1) Electrical grounding checks (moved down the list since it was DONE on the test stand, not on the chamber)
2) IAS SEI alignment complete, ISI & HEPI floating - DONE
3) IAS ETMy alignment Round 1 - DONE
4) TMS alignment - DONE
5) TMS OSEM alignment - moved up list since DONE
6) ESD continuity check
7) Clamp ETMy EQ stops - DONE
8) Reapply FirstContact to ETMy-HR and ERM-AR - (did not so ETM-HR since sheet was still somewhat intact) DONE
9) Swap Flooring - Waiting for FTIR on new set, can slip down list but not beyond 14a. DONE
10) Viewport in-situ cleaning (or swap if deemed necessary) DONE
11) SEI Electrical grounding checks
12) SUS Electrical grounding checks
13) Close the ring heater and set fiber guard to "nominal" position DONE, AS MUCH AS IT CAN BE
14) Unlock ETMy, remove all TFE except TM line stops, and physically check for rubbing as per T1200213 (still drafting) DONE (PenRe has be relocked due to flag repair) Also, 1/4-20 x 3/4" vented screws installed for sleeve (these were overlooked in the making of this list). DONE
15) ETMy BOSEM alignment, factoring in buoyancy as per T1100616 DONE
16a) ETMy testing (See Phase 3a G1100693) DONE
16b) IAS ETMy alignment again (if testing showed interference and suspension was adjusted to fix) DONE
17) Repeat step 16 until all Phase 3a testing is complete - usually done in 3 rounds in order to clear all issues. Note, IAS requires removal of ETMy-HR FC completely. DONE (PENDING FINAL SET OF TFS TODAY)
18) TMS alignment check if needed IN PROCESS
19) Lock down flooring nuts if loose
20) Set all EQ stops as per M1100256 DONE
21) Final FirstContact cleaning if needed
22) Remove TM line stops
23) Take pictures and count number of PEEK clamps
24) Set witness plates
25) Remove all tools
Shut the doors.