| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
14310
|
Tue Nov 20 13:13:01 2018 |
gautam | Update | VAC | IMC alignment is okay | I checked the IMC alignment following the
vent, for which the manual beam block placed
on the PSL table was removed. The alignment |
|
|
14318
|
Mon Nov 26 15:58:48 2018 |
Steve | Update | VAC | Vent 81 | Gautam, Aaron, Chub & Steve,
ETMY heavy door replaced by light
one. |
|
|
14322
|
Tue Nov 27 17:06:51 2018 |
Steve | Configuration | VAC | Agilent 84FS turbo installed as TP2 | Chub & Steve, |
|
|
14367
|
Wed Dec 19 14:19:15 2018 |
Koji | Summary | VAC | Plan for pumpoing down test | We
still need elaborated test procedure posted
12/29 Wed |
|
|
14370
|
Wed Dec 19 21:14:50 2018 |
gautam | Update | VAC | Pumpdown tomorrow | I just spoke to Jon who asked me to make
this elog - we will be ready to test one
or more parts of the pumpdown procedure tomorrow |
|
|
14372
|
Thu Dec 20 08:38:27 2018 |
Jon | Update | VAC | Pumpdown tomorrow | Linked is the pumpdown
procedure, contained in the old 40m documentation.
The relevant procedure is "All Off --> |
|
|
14373
|
Thu Dec 20 10:28:43 2018 |
gautam | Update | VAC | Heavy doors back on for pumpdown 82 | [Chub, Koji, Gautam]
We replaced the EY and IOO chamber
heavy doors by 10:10 am PST. Torquing was |
|
|
14377
|
Fri Dec 21 11:13:13 2018 |
gautam | Omnistructure | VAC | N2 line valved off | Per the discussion yesterday, I
valved off the N2 line in the drill press |
|
|
14379
|
Fri Dec 21 12:57:10 2018 |
Koji | Omnistructure | VAC | N2 line valved off | Independent question: Are all the turbo
forelines vented automatically? We manually
did it for the main roughing line. |
|
|
14380
|
Thu Jan 3 15:08:37 2019 |
gautam | Omnistructure | VAC | Vac status unknown | Larry W came by the 40m, and reported that
there was a campus-wide power glitch (he
was here to check if our networking infrastructure |
|
|
14383
|
Fri Jan 4 10:25:19 2019 |
Jon | Omnistructure | VAC | N2 line valved off | Yes, for TP2 and TP3. They both have
a small vent valve that opens automatically
on shutdown. |
|
|
14391
|
Wed Jan 9 11:07:09 2019 |
gautam | Update | VAC | New Vac channel logging | Looks like I didn't restart all the
daqd processes last night, so the data was
not in fact being recorded to frames. I just |
|
|
14393
|
Wed Jan 9 20:01:25 2019 |
Jon | Update | VAC | Second pumpdown completed | [Jon, Koji, Chub, Gautam]
Summary
The
second pumpdown with the new vacuum system |
|
|
14394
|
Thu Jan 10 10:23:46 2019 |
gautam | Update | VAC | overnight leak rate | Overnight, the pressure increased from
247 uTorr to 264 uTorr over a period of 30000
seconds. Assuming an IFO volume of 33,000 |
|
|
14395
|
Thu Jan 10 11:32:40 2019 |
Chub | Update | VAC | Manual valve interfaced with CDS | Connected the manual gate valve status
indicator to the Acromag box this morning.
Labeled the temporary cable (a 50' 9p |
|
|
14396
|
Thu Jan 10 19:59:08 2019 |
Jon | Update | VAC | Vac System Running Normally on Turbo Pumps | [Jon, Gautam, Chub]
Summary
We continued
the pumpdown of the IFO today. The main volume |
|
|
14398
|
Mon Jan 14 10:06:53 2019 |
gautam | Update | VAC | Vent 82 complete | [chub, gautam]
IFO pressure was ~2e-4 |
|
|
14406
|
Fri Jan 18 17:44:14 2019 |
gautam | Update | VAC | Pumping on RGA volume | Steve came by the lab today, and looked
at the status of the upgraded vacuum system.
He recommended pumping on the RGA volume, |
|
|
14410
|
Sun Jan 20 23:41:00 2019 |
Jon | Omnistructure | VAC | Notes on vac serial comm, adapter wiring | I've attached my handwritten notes
covering all the serial communications in
the vac system, and the relevant wiring for |
|
|
14412
|
Tue Jan 22 20:45:21 2019 |
gautam | Update | VAC | New N2 setup | The N2 ran out this weekend (again no reminder
email, but I haven't found the time to
setup the Python mailer yet). So all the |
|
|
14419
|
Fri Jan 25 16:14:51 2019 |
gautam | Update | VAC | Vacuum interlock code, N2 warning | I reset the remote of this git repo to
the 40m version instead of Jon's personal
one, to ensure consistency between what's |
|
|
14429
|
Sat Feb 2 21:53:24 2019 |
Koji | Update | VAC | overnight leak rate | The pressure of the main volume increased
from ~1mtorr to 50mtorr for the past 24 hours
(86ksec). This rate is about x1000 of the |
|
|
14430
|
Sun Feb 3 15:15:21 2019 |
gautam | Update | VAC | overnight leak rate | I looked into this a bit today. Did a walkthrough
of the lab, didn't hear any obvious hissing
(makes sense, that presumably would signal |
|
|
14431
|
Sun Feb 3 20:52:34 2019 |
Koji | Update | VAC | overnight leak rate | We can pump down (or vent) annuli. If this
is the leak between the main volume and the
annuli, we will be able to see the effect |
|
|
14432
|
Mon Feb 4 12:23:24 2019 |
gautam | Update | VAC | pumpdown 83 - leak tests | [koji, gautam]
As planned, we valved off the main
volume and the annuli from the turbo-pumps |
|
|
14434
|
Tue Feb 5 10:11:30 2019 |
gautam | Update | VAC | leak tests complete, pumpdown 83 resumed | I guess we forgot to close V5, so we were
indeed pumping on the ITMY and ETMY annuli,
but the other three were isolated suggest |
|
|
14436
|
Tue Feb 5 19:30:14 2019 |
gautam | Update | VAC | Main volume at 20 uTorr | Pumpdown looks healthy, so I'm leaving
the TPs on overnight. At some point, we should
probably get the RGA going again. I don't |
|
|
14438
|
Thu Feb 7 13:55:25 2019 |
gautam | Update | VAC | RGA turned on | [chub, steve, gautam]
Steve came by the lab today. He |
|
|
14440
|
Thu Feb 7 19:28:46 2019 |
gautam | Update | VAC | IFO recovery | [rana, gautam]
The full 1 W is again being sent
into the IMC. We have left the PBS+HWP combo |
|
|
14452
|
Thu Feb 14 15:37:35 2019 |
gautam | Update | VAC | Vacromag failure | [chub, gautam]
Sumary:
One of the XT1111 units (XT1111a) |
|
|
14453
|
Thu Feb 14 18:16:24 2019 |
Jon | Update | VAC | Vacromag failure | I sent Gautam instructions to first try
stopping the modbus service, power
cycling the Acromag chassis, then |
|
|
14456
|
Fri Feb 15 11:58:45 2019 |
Jon | Update | VAC | Vac system is back up | The problem encountered with the vac controls
was indeed resolved via the recommendation
I posted yesterday. The Acromags had gone |
|
|
14458
|
Fri Feb 15 18:41:18 2019 |
rana | Update | VAC | Vac system is back up | If the acromags lock up whenever there
is an electrical spike, shouldn't we
have them on UPS to smooth out these ripples? |
|
|
14460
|
Fri Feb 15 19:50:09 2019 |
rana | Update | VAC | Vac system is back up | The acromags are on the UPS. I suspect
the transient came in on one of the signal
lines. Chub tells me he unplugged one of |
|
|
14461
|
Fri Feb 15 20:07:02 2019 |
Jon | Update | VAC | Updated vacuum punch list | While working on the vac controls
today, I also took care of some of the remaining
to-do items. Below is a summary of what was done, |
|
|
14462
|
Fri Feb 15 21:15:42 2019 |
gautam | Update | VAC | dd backup of c1vac made |
Connected one of the solid-state
drives to c1vac. It was /dev/sdb.
Formatted
the drive using sudo mkfs -t |
|
|
14487
|
Wed Mar 20 12:31:30 2019 |
Jon | Update | VAC | Doing vac controls work | I'm rebooting the IOLAN server to load
new serial ports. The interlocks might trip
when the pressure gauge readbacks cut out. |
|
|
14488
|
Wed Mar 20 19:26:25 2019 |
Jon | Update | VAC | Protection against AC power loss | Today I implemented protection of the vac
system against extended power losses. Previously,
the vac controls system (both old and new) |
|
|
14489
|
Wed Mar 20 20:07:22 2019 |
Jon | Update | VAC | Doing vac controls work | Work is completed and the vac system is
back in its nominal state.
|
|
|
14490
|
Thu Mar 21 12:46:22 2019 |
Jon | Update | VAC | More vac controls upgrades | The vac controls system is going down for
migration from Python 2.7 to 3.4. Will advise
when it is back up. |
|
|
14491
|
Thu Mar 21 17:22:52 2019 |
Jon | Update | VAC | More vac controls upgrades | I've converted all the vac control
system code to run on Python 3.4, the latest
version available through the Debian |
|
|
14494
|
Thu Mar 21 21:50:31 2019 |
rana | Update | VAC | Protection against AC power loss | agreed - we need all pumps on UPS for their
safety and also so that we can spin them
down safely. Can you and Chub please find |
|
|
14509
|
Tue Apr 2 18:40:01 2019 |
gautam | Update | VAC | Vac failure | While glancing at my |
|
|
14511
|
Wed Apr 3 09:07:46 2019 |
gautam | Update | VAC | Vac failure | Overnight pressure trends don't suggest
anything went awry after the initial interlock
trip. |
|
|
14512
|
Wed Apr 3 10:42:36 2019 |
gautam | Update | VAC | TP2 forepump replaced | Bob and Chub concluded that the drypump
that serves as TP2's forepump had failed.
Steve had told me the whereabouts of a spare |
|
|
14514
|
Wed Apr 3 16:17:17 2019 |
Jon | Update | VAC | TP2 forepump replaced | I can't explain the mechanical switching
sound Gautam reported. The relay controlling
power to the TP2 forepump is housed in the |
|
|
14515
|
Wed Apr 3 18:35:54 2019 |
gautam | Update | VAC | PSL shutter re-opened | PSL shutter was re-opened at 6pm local
time. IMC was locked. As of 10pm, the main
volume pressure is already back down to the |
|
|
14517
|
Fri Apr 5 01:10:18 2019 |
gautam | Update | VAC | TP3 forepump is also noisy | Is this one close to failure as well? |
|
|
14546
|
Tue Apr 16 22:06:51 2019 |
gautam | Update | VAC | Vac interlock tripped again | This happened again, about 30,000 seconds
(~2:06pm local time according to the logfile)
ago. The cited error was the same - |
|
|
14550
|
Wed Apr 17 18:12:06 2019 |
gautam | Update | VAC | Vac interlock tripped again | After getting the go ahead from Chub and
Jon, I restored the Vacuum state to "Vacuum
normal", see Attachment #1. Steps: |
|