| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
15557
|
Fri Sep 4 21:12:51 2020 |
Jon | Update | VAC | Vac system UPS installation | The vac work is completed. All of the vacuum
equipment is now running on the new 120V
UPS, except for TP1. The 230V TP1 is still |
|
|
15558
|
Sat Sep 5 12:01:10 2020 |
Jon | Update | VAC | Vac system UPS installation | Summary
Yesterday's UPS
switchover was mostly a success. The new
Tripp |
|
|
15577
|
Wed Sep 16 12:03:07 2020 |
Jon | Update | VAC | Replacing pressure gauges | Assembled is the list of dead pressure
gauges. Their locations are also circled
in Attachment 1. |
|
|
15582
|
Sat Sep 19 18:07:35 2020 |
Koji | Update | VAC | TP3 RP failure | I came to the campus and Gautam notified
that he just had received the alert from
the vac watchdog. |
|
|
15586
|
Sat Sep 19 19:37:16 2020 |
not Koji | Update | VAC | TP3 RP failure | Disconcerting because those tip seals were
just replaced [15417].
Maybe they were just defective, but if there |
|
|
15591
|
Mon Sep 21 15:57:08 2020 |
Jordan | Update | VAC | TP3 Forepump Replacement and Vac reset | I removed the forepump (Varian SH-110)
for TP3 today to see why it had failed over
the weekend. I tested it in the C&B lab |
|
|
15599
|
Wed Sep 23 08:57:18 2020 |
gautam | Update | VAC | TP2 running HOT | The interlocks tripped at ~630am local
time. Jordan reported that TP2 was supposedly
running at 52 C (!). |
|
|
15600
|
Wed Sep 23 10:06:52 2020 |
Koji | Update | VAC | TP2 running HOT | Here is the timeline. This suggests TP2
backing RP failure.
1st line: TP2 foreline pressure |
|
|
15602
|
Wed Sep 23 15:06:54 2020 |
Jordan | Update | VAC | TP2 Forepump Re-install | I removed the forepump to TP2 this morning
after the vacuum failure, and tested in the
C&B lab. I pumped down on a small volume |
|
|
15615
|
Tue Oct 6 14:35:16 2020 |
Jordan | Update | VAC | Spare forepumps | I have placed 3 new in box, IDP 7 forepumps
along the x arm of the interferometer. These
are to be used as spares for both the 40m |
|
|
15668
|
Tue Nov 10 11:59:37 2020 |
gautam | Update | VAC | Stuck RV2 | I've uploaded some more photos here.
I believe the problem is a worn out thread
where the main rotary handle attaches to |
|
|
15681
|
Wed Nov 18 17:51:50 2020 |
gautam | Update | VAC | Agilent pressure gauge controller delivered | It is stored along with the cables that
arrived a few weeks ago, awaiting the gauges
which are now expected next week sometime. |
|
|
15686
|
Mon Nov 23 16:33:10 2020 |
gautam | Update | VAC | More vacuum deliveries | Five Agilent pressure gauges were delivered
to the 40m. It is stored with the controller
and cables in the office area. This completes |
|
|
15692
|
Wed Dec 2 12:27:49 2020 |
Jon | Update | VAC | Replacing pressure gauges | Now that the new Agilent full-range gauges
(FRGs) have been received, I'm putting
together an installation plan. Since |
|
|
15698
|
Thu Dec 3 10:33:00 2020 |
gautam | Update | VAC | TrippLite UPS delivered | The latest greatest UPS has been delivered.
I will move it to near the vacuum rack in
its packaging for storage. It weighs >100lbs |
|
|
15703
|
Thu Dec 3 14:53:58 2020 |
Jon | Update | VAC | Replacing pressure gauges | Update to the gauge replacement plan (15692),
based on Jordan's walk-through today. |
|
|
15721
|
Wed Dec 9 20:14:49 2020 |
gautam | Update | VAC | UPS failure | Summary:
The (120V) UPS at the vacuum
rack is faulty.
The drypump backing |
|
|
15722
|
Thu Dec 10 11:07:24 2020 |
Chub | Update | VAC | UPS fault | Is that a fault code that you can decipher
in the manual, or just a light telling you
nothing but your UPS is dead? |
|
|
15723
|
Thu Dec 10 11:17:50 2020 |
Chub | Update | VAC | UPS fault | I can't find anything in the manual
that describes the nature of the FAULT message.
In fact, it's not mentioned at all. |
|
|
15724
|
Thu Dec 10 13:05:52 2020 |
Jon | Update | VAC | UPS failure | I've investigated the vacuum controls
failure that occurred last night. Here's
what I believe happened. |
|
|
15725
|
Thu Dec 10 14:29:26 2020 |
gautam | Update | VAC | UPS failure | I don't buy this story - P2 only briefly
burped around GPStime 1291608000 which is
around 8pm local time, which is when I was |
|
|
15748
|
Wed Jan 6 15:28:04 2021 |
gautam | Update | VAC | Vac rack UPS batteries replaced | [chub, gautam]
the replacement was done this afternoon.
The red "Replace Battery" indicator |
|
|
16047
|
Mon Apr 19 09:17:51 2021 |
Jordan | Update | VAC | Empty N2 Tanks | When I came into the lab this morning,
I noticed that both N2 tanks were empty.
I had swapped one on Friday (4-16-21) before |
|
|
16064
|
Wed Apr 21 12:56:00 2021 |
Jordan | Update | VAC | Empty N2 Tanks | Installed T2 today, and leaked checked
the entire line. No issues found. It could
have been a bad valve on the tank itself. |
|
|
16090
|
Wed Apr 28 11:31:40 2021 |
Jon | Update | VAC | Empty N2 Tanks | I checked out what happened on c1vac. There
are actually two independent monitoring codes
running: |
|
|
16305
|
Wed Sep 1 14:16:21 2021 |
Jordan | Update | VAC | Empty N2 Tanks | The right N2 tank had a bad/loose valve
and did not fully open. This morning the
left tank was just about empty and the right |
|
|
16316
|
Wed Sep 8 18:00:01 2021 |
Koji | Update | VAC | cronjobs & N2 pressure alert | In the weekly meeting, Jordan pointed out
that we didn't receive the alert for
the low N2 pressure. |
|
|
16404
|
Thu Oct 14 18:30:23 2021 |
Koji | Summary | VAC | Flange/Cable Stand Configuration | Flange Configuration for BHD
We will need total 5 new
cable stands. So Qty.6 is the number to be |
|
|
16410
|
Mon Oct 18 10:02:17 2021 |
Koji | Update | VAC | Vent Started / Completed | [Chub, Jordan, Anchal, Koji]
- Checked the main volume is isolated.
- TP1 and TP2 were made isolated from |
|
|
16412
|
Tue Oct 19 10:59:09 2021 |
Koji | Update | VAC | Vent Started / Completed | [Chub, Jordan, Yehonathan, Anchal,
Koji]
North door of the BS chamber opened |
|
|
16413
|
Tue Oct 19 11:30:39 2021 |
Koji | Update | VAC | How to vent TP1 | I learned that TP1 was vented through the
RGA room in the past. This can be done by
opening VM2 and a manual valve ("needle |
|
|
16418
|
Wed Oct 20 15:58:27 2021 |
Koji | Update | VAC | How to vent TP1 | Probably the hard disk of c0rga is dead.
I'll follow up in this elog later today.
Looking at the log in /opt/rtcds/caltech/c1/scripts/RGA/logs |
|
|
16490
|
Mon Dec 6 14:26:52 2021 |
Koji | Update | VAC | Pumping down the RGA section | Jordan reported that the RGA section needs
to be pumped down to allow the analyzer to
run at sufficiently low pressure (P<1e-4 |
|
|
16493
|
Tue Dec 7 13:12:50 2021 |
Koji | Update | VAC | Pumping down the RGA section | So that Jordan can run the RGA scan this
afternoon, I ran TP3 and started pumping
down the RGA section. |
|
|
16494
|
Wed Dec 8 10:14:43 2021 |
Jordan | Update | VAC | Pumping down the RGA section | After an overnight pumpdown/RGA warm up,
I took a 100 amu scan of the RGA volume and
subsequent pumping line. Attached is a screenshot |
|
|
16501
|
Fri Dec 10 19:22:01 2021 |
Koji | Update | VAC | Pumping down the RGA section | The scan result was ~x10 higher than the
previously reported scan on 2020/9/15 (https://nodus.ligo.caltech.edu:8081/40m/15570), |
|
|
16508
|
Wed Dec 15 15:06:08 2021 |
Jordan | Update | VAC | Vacuum Feedthru Install | Jordan, Chub
We installed the 4x DB25 feedthru
flange on the North-West port of ITMX chamber |
|
|
16529
|
Tue Dec 21 16:35:39 2021 |
Koji | Update | VAC | ITMX NW feedthru (LO1-1) connector pin bent | I've received a report that a pin of
an ITMX NW feedthru connector was bent. (Attachment
1) |
|
|
16634
|
Mon Jan 31 10:39:19 2022 |
Jordan | Update | VAC | TP1 and Manual Gate Valve Removal | Jordan, Chub
Today, Chub and I removed TP1 and
the failed manual gate valve off of the pumping |
|
|
16643
|
Thu Feb 3 10:25:59 2022 |
Jordan | Update | VAC | TP1 and Manual Gate Valve Install | Jordan, Chub
Chub and I installed the new manual
gate valve (Nor-Cal GVM-6002-CF-K79) and |
|
|
16682
|
Sat Feb 26 01:01:40 2022 |
Tega | Update | VAC | Ongoing work to get the FRG gauges readouts to EPICs channels | I will make a detailed elog later today
giving a detailed outline of the connection from
the Agilent gauge controller to the vacuum |
|
|
16683
|
Sat Feb 26 15:45:14 2022 |
Tega | Update | VAC | Ongoing work to get the FRG gauges readouts to EPICs channels | I have attached a flow diagram of my understanding
of how the gauges are connected to the network.
Earlier today, I connected the |
|
|
16688
|
Mon Feb 28 19:15:10 2022 |
Tega | Update | VAC | Ongoing work to get the FRG gauges readouts to EPICs channels | I decided to create an independent service
for the XGS data readout so we can get this
to work first before trying to integrate |
|
|
16691
|
Tue Mar 1 20:38:49 2022 |
Tega | Update | VAC | Ongoing work to get the FRG gauges readouts to EPICs channels | During my investigation, I inadvertently
overwrote the serial port configuration for
the connected devices. So I am now working |
|
|
16692
|
Wed Mar 2 11:50:39 2022 |
Tega | Update | VAC | Ongoing work to get the FRG gauges readouts to EPICs channels | Here is the IOLAN SDS TCP socket setting
and the USBserial setting for comparison.
I have also included the python |
|
|
16693
|
Wed Mar 2 12:40:08 2022 |
Tega | Update | VAC | Ongoing work to get the FRG gauges readouts to EPICs channels | Connector Test:
A quick test to rule out any issue
with the Ethernet to Serial adapter was done |
6x |
|
16701
|
Fri Mar 4 18:12:44 2022 |
Koji | Update | VAC | RGA pumping down | 1. Jordan reported that the newly installed
Pirani gauge for P2 shows 850Torr while PTP2
show 680 Torr. Because of this, the vacuum |
|
|
16704
|
Sun Mar 6 18:14:45 2022 |
Tega | Update | VAC | Ongoing work to get the FRG gauges readouts to EPICs channels | Following repeated failure to establish
communication between c1vac and the XGS600
controller via Perle IOLAN serial device |
|
|
16706
|
Mon Mar 7 13:53:40 2022 |
Tega | Update | VAC | Ongoing work to get the FRG gauges readouts to EPICs channels | So it appears that my deduction from
the pictures of needing a cable swap was
correct, however, it turns out that the installed |
|
|
16707
|
Mon Mar 7 14:52:34 2022 |
Koji | Update | VAC | Ongoing work to get the FRG gauges readouts to EPICs channels | Great trouble shoot!
> I guess, the only remaining
issue now is the incorrect atmospheric |
|