| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
15280
|
Wed Mar 18 22:10:41 2020 |
Koji | Update | VAC | Main vol pressure jump | I was in the lab at the time. But did not
notice anything (like turbo sound etc). I
was around ETMX/Y (1X9, 1Y4) rack and SUS |
|
|
15283
|
Wed Mar 25 15:15:55 2020 |
gautam | Update | VAC | Vacuum interlock code, N2 warning update | The email address in the N2 checking script
wasn't right - I now updated it to email
the 40m list if the sum of reserve tank pressures |
|
|
15304
|
Wed Apr 15 15:15:17 2020 |
Chub | Update | VAC | nitrogen cylinders delivered | Four nitrogen cylinders replaced the empties
in the rack at the west entrance. Additionally,
Airgas will now deliver only once a week. |
|
|
15314
|
Thu Apr 30 07:29:01 2020 |
Chub | Update | VAC | N2 delivered. | Hi All,
The new nitrogen cylinders were
delivered to the rack at the west entrance. |
|
|
15391
|
Thu Jun 11 11:48:43 2020 |
gautam | Update | VAC | Vac failure | There appears to have been some sort of
vacuum failure. |
|
|
15392
|
Thu Jun 11 16:14:03 2020 |
gautam | Update | VAC | Vac failure - probable cause is serial comm glitch | Summary:
It looks like the main vacuum interlock
was tripped due to a serial communication |
|
|
15393
|
Thu Jun 11 17:35:34 2020 |
gautam | Update | VAC | Pumpspool UPS needs battery replacement | Summary:
The pumpspool UPS has its " |
|
|
15394
|
Fri Jun 12 01:23:32 2020 |
Koji | Update | VAC | Pumpspool UPS needs battery replacement | 1. I agree that it's likely that it
was the temp signal glitch.
Recom #2: I approve to reopen the |
|
|
15396
|
Fri Jun 12 17:32:40 2020 |
Koji | Update | VAC | Pumpspool UPS needs battery replacement | Jon and Koji remotely supported Jordan's
resetting the TP2 controller.
Here |
|
|
15397
|
Fri Jun 12 19:02:52 2020 |
gautam | Update | VAC | Pumpspool UPS needs battery replacement | I still don't understand why restoring
the vacuum is contingent on this functionality
working. All the TPs have their own internal |
|
|
15398
|
Fri Jun 12 19:23:56 2020 |
Koji | Update | VAC | Pumpspool UPS needs battery replacement | The vacuum safety policy and design are
not clear to me, and I don't know what
the first and second defense is. Since we |
|
|
15399
|
Fri Jun 12 19:33:31 2020 |
gautam | Update | VAC | Pumpspool UPS needs battery replacement | Didn't mean to sound whiny. I will
wait until the vacuum team tells me it is
okay. |
|
|
15402
|
Tue Jun 16 13:35:03 2020 |
Jon | Update | VAC | Temporary vac fix / IFO usable again | [Jon, Jordan, Koji]
Today Jordan reconfigured the vac
system to allow pumping of the main volume |
|
|
15404
|
Wed Jun 17 16:27:51 2020 |
gautam | Update | VAC | Questions/comments on vacuum | I missed the vacuum discussion on the call
today, but I have some questions/comments:
Isn’t it true that |
|
|
15406
|
Thu Jun 18 11:00:24 2020 |
Jon | Update | VAC | Questions/comments on vacuum |
Quote:
|
|
|
15407
|
Thu Jun 18 12:00:36 2020 |
gautam | Update | VAC | Questions/comments on vacuum | I agree there were MEDM fields, but I can't
find any record of these channels being recorded
till 2018 December, so I don't agree |
|
|
15408
|
Thu Jun 18 14:13:03 2020 |
Jon | Update | VAC | Questions/comments on vacuum | I agree there
were MEDM fields, but I can't find any |
|
|
15409
|
Thu Jun 18 15:25:08 2020 |
Jordan | Update | VAC | TP2 and TP3 Forepump removal | I removed the backing pumps for TP2 and
TP3 today to test ultimate pressure and determine
if they need a tip seal replacement. This |
|
|
15410
|
Thu Jun 18 15:46:34 2020 |
gautam | Update | VAC | Questions/comments on vacuum | So why not just have a special mode for
the interlock code during pumpdown and venting,
and during normal operation we expect the |
|
|
15411
|
Thu Jun 18 16:56:34 2020 |
Jordan | Update | VAC | TP2 and TP3 Forepump removal |
Quote:
|
|
|
15412
|
Thu Jun 18 22:33:57 2020 |
Jon | Omnistructure | VAC | Vac hardware purchase list | Replacement Hardware Purchase List
I've
created a purchase
list of hardware needed to restore the aging |
|
|
15413
|
Fri Jun 19 07:40:49 2020 |
Jon | Update | VAC | Questions/comments on vacuum | I think we should discuss interlock possibilities at
a 40m meeting. I'm reluctant to make
the system more complicated, but perhaps |
|
|
15415
|
Fri Jun 19 09:57:35 2020 |
gautam | Update | VAC | Questions/comments on vacuum | For this particular email service, ideally
the email should be sent out as soon as the
interlock is tripped, so this would require |
|
|
15417
|
Fri Jun 19 14:03:50 2020 |
Jordan | Update | VAC | Forepump Tip Seal Replacement | Tip Seals were replaced on the forepumps
for TP2 and TP3, and both are ready to be
installed back onto the forelines. |
|
|
15421
|
Mon Jun 22 10:43:25 2020 |
Jon | Configuration | VAC | Vac maintenance at 11 am | The vac system is going down at 11 am today
for planned maintenance:
Re-install the repaired |
|
|
15424
|
Mon Jun 22 20:06:06 2020 |
Jon | Configuration | VAC | Vac maintenance complete | This work is finally complete. The dry
pump replacement was finished quickly but
the controls updates required some substantial |
|
|
15425
|
Tue Jun 23 17:54:56 2020 |
rana | Configuration | VAC | Vac maintenance complete | I propose we go for all CAPS for all channel
names. The lower case names is just a holdover
from Steve/Alan from the 90's. All other |
|
|
15446
|
Wed Jul 1 18:03:04 2020 |
Jon | Configuration | VAC | UPS replacements | I looked into how the new UPS devices
suggested by Chub would communicate with
the vac interlocks. There are several possible |
|
|
15465
|
Thu Jul 9 18:00:35 2020 |
Jon | Configuration | VAC | UPS replacements | Chub has placed the order for two new UPS
units (115V for TP2/3 and a 220V version
for TP1). |
|
|
15499
|
Thu Jul 23 15:58:24 2020 |
Jon | Summary | VAC | Vacuum controls refurbishment plan | This year we've struggled with vacuum
controls unreliability (e.g., spurious interlock
triggers) caused by decaying hardware. Here |
|
|
15500
|
Fri Jul 24 15:40:59 2020 |
Jordan | Update | VAC | Installation of two new UPS units | I installed the Tripp
Lite SMX1000RT2U and Tripp
Lite Smart1000LCD at the |
|
|
15501
|
Mon Jul 27 15:48:36 2020 |
Jon | Summary | VAC | Vacuum parts ordered | To carry out the next steps of the vac
refurbishment plan [ELOG
15499], I've ordered parts necessary |
|
|
15502
|
Tue Jul 28 12:22:40 2020 |
Jon | Update | VAC | Vac interlock test today 1:30 pm | This afternoon Jordan is going to carry
out a test of the V4 and V5 hardware
interlocks. To inform the interlock improvement |
|
|
15504
|
Tue Jul 28 14:11:14 2020 |
Jon | Update | VAC | Vac interlock test today 1:30 pm | This test has been completed. The IFO configuration
has been reverted to nominal.
For future reference: yes, |
|
|
15526
|
Fri Aug 14 10:10:56 2020 |
Jon | Configuration | VAC | Vacuum repairs today | The vac system is going down now for planned
repairs [ELOG
15499]. It will likely take most |
|
|
15527
|
Sat Aug 15 02:02:13 2020 |
Jon | Configuration | VAC | Vacuum repairs today | Vacuum work is completed. The TP2 and TP3
interlocks have been overhauled as proposed
in ELOG |
|
|
15528
|
Sat Aug 15 15:12:22 2020 |
Jon | Configuration | VAC | Overhaul of small turbo pump interlocks | Summary
Yesterday I completed
the switchover of small turbo pump interlocks
as proposed in ELOG |
|
|
15537
|
Mon Aug 24 08:13:56 2020 |
Jon | Update | VAC | UPS installation | I'm in the lab this morning to interface
the two new UPS units with the digital controls
system. Will be out by lunchtime. The disruptions |
|
|
15538
|
Mon Aug 24 11:25:07 2020 |
Jon | Update | VAC | UPS installation | I'm leaving the lab shortly. We're
not ready to switch over the vac equipment
to the new UPS units yet. |
|
|
15541
|
Wed Aug 26 15:48:31 2020 |
gautam | Update | VAC | Control screen left open on vacuum workstation | I found that the control MEDM screen was
left open on the c1vac workstation. This
should be closed every time you leave the |
|
|
15556
|
Fri Sep 4 15:26:55 2020 |
Jon | Update | VAC | Vac system UPS installation | The vac controls are going down now to
pull and test software changes. Will advise
when the work is completed. |
|