| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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: |
|
|
14574
|
Thu Apr 25 10:32:39 2019 |
Jon | Update | VAC | Vac interlocks updated | I slightly cleaned up Gautam's disabling
of the UPS-predicated vac interlock and restarted
the interlock service. This interlock is |
|
|
14575
|
Thu Apr 25 11:27:11 2019 |
gautam | Update | VAC | PSL shutter re-opened | This activity seems to have closed the
PSL shutter (actually I'm not sure why
that happened - the interlock should only |
|
|
14631
|
Wed May 22 22:50:13 2019 |
gautam | Update | VAC | Pumpdown prep | I did the following:
Checked the ETMY OSEM sensing
matrix and OSEM actuation matrix - more on |
|
|
14634
|
Thu May 23 15:30:56 2019 |
gautam | Update | VAC | Pumpdown underway - so far so good! | [chub, koji, gautam]
We executed the pre-pumpdown
tasks per the checklist - heavy doors were |
|
|
14636
|
Fri May 24 11:47:15 2019 |
gautam | Update | VAC | IFO is almost at nominal vacuum | [chub, gautam]
Overnight, the pressure of the
main volume only rose by 10 mtorr, so there |
|
|
14640
|
Mon May 27 11:37:13 2019 |
gautam | Update | VAC | c1vac is unresponsive | I've been monitoring the status of
the pumpdown remotely with ndscope lookbacks
of C1:Vac-CC1_pressure. Today morning, I |
|
|
14641
|
Tue May 28 09:51:33 2019 |
gautam | Update | VAC | c1vac hard-rebooted | The vacuum itself was fine - CC1 gauge
reported a pressure of 1.3e-5 torr. Note
to self: the C1:Vac-CC1_HORNET_PRESSURE channel, |
|
|
15140
|
Wed Jan 22 16:19:47 2020 |
Jon | Update | VAC | TP3 controller errors | Gautam and I debugged a communications
problem with TP3 that was causing its python
service to fail. We traced the problem back |
|
|
15279
|
Wed Mar 18 21:43:26 2020 |
gautam | Update | VAC | Main vol pressure jump | There was a jump in the main volume pressure
at ~6pm PDT yesterday. The cause is unknown,
but the pressure doesn't seem to be coming |
|