| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
15385
|
Tue Jun 9 09:35:02 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab today
from 9:30am to 4pm. |
|
|
15386
|
Tue Jun 9 14:55:43 2020 |
Jon | Update | BHD | MM telescope actuation range requirments | I don't think we ever discussed why
the angular RMS of the ETMs is so much higher
than the ITMs. Maybe that's a separate |
|
|
15387
|
Tue Jun 9 15:02:56 2020 |
eHang | Update | BHD | Astigmatism and scattering plots | Using the updated AOI's for the LO
path: (4.8, 47.9, 2.9, 4.5) deg for (LO1,
LO2, LO3, LO4), we obtain the following results. |
|
|
15388
|
Wed Jun 10 14:00:33 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab from
10am to 4pm today. I will also replace an
empty N2 cylinder. |
|
|
15389
|
Thu Jun 11 09:37:38 2020 |
Jon | Update | BHD | Conclusions on Mode-Matching Telescopes | After further astigmatism/tolerance analysis
[ELOG
15380, 15387] |
|
|
15390
|
Thu Jun 11 11:14:12 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab today
from 11am to 4pm. |
|
|
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 |
|
|
15395
|
Fri Jun 12 11:40:14 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab today
from 12pm to 4pm. |
|
|
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. |
|
|
15400
|
Tue Jun 16 08:58:11 2020 |
Jordan | Update | General | Presence at 40m | I will be at the 40m today at 10am to deliver
optics to Downs and to replace the TP2 controller. |
|
|
15401
|
Tue Jun 16 13:05:36 2020 |
Koji | Update | COC | ITM spares and New PR3 mirrors transported to Downs for phasemap measurement | ITMU01 / ITMU02 as well as the five E1800089
mirrors came back to the 40m. Instead, the
two ETM spares (ETMU06 / ETMU08) were delivered |
|
|
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 |
|
|
15403
|
Tue Jun 16 16:05:26 2020 |
Jordan | Update | General | N2 Replacement | I replaced an empty N2 cylinder, there
are now two empty tanks in the outside rack. |
|
|
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 |
|
|
15405
|
Thu Jun 18 09:46:03 2020 |
Jordan | Update | General | Presence at 40m | I will be at the 40m today from 9:30am
to 4pm. |
|
|
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:
|
|
|
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 |
|
|
15414
|
Fri Jun 19 08:47:10 2020 |
Jordan | Update | General | Presence at 40m | I will be at the 40m today from 9am to
3pm. |
|
|
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 |
|
|
15416
|
Fri Jun 19 11:02:10 2020 |
Chub | Update | General | custom feedthrough flanges are here! | The four 4x25DSUB and single 8x25DSUB feedthrough
flanges have arrived and will be picked up
from the dock and brought to the 40M lab. |
|
|
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. |
|
|
15418
|
Fri Jun 19 16:30:09 2020 |
gautam | Update | ASC | Some thoughts about ASC | Summary:
In ELOG
15368, I had claimed that the POP QPD |
|
|
15419
|
Fri Jun 19 17:06:50 2020 |
gautam | Update | LSC | What should the short-term commissioning goals be? | Summary:
|
|
|
15420
|
Fri Jun 19 19:21:25 2020 |
gautam | Update | General | PSL shutter re-opened | The PSL shutter was closed from the vacuum
interlock trip. Today, I did the following:
Re-aligned input beam to |
|
|
15422
|
Mon Jun 22 13:16:38 2020 |
Jordan | Update | General | Presence at 40m | I will be at the 40m today from 11am to
4pm. |
|
|
15423
|
Mon Jun 22 17:51:50 2020 |
gautam | Update | CDS | c1iscaux was down | The machine needed a hard reboot as it
was un-ssh-able.
The exact time that the machine |
|
|
15426
|
Wed Jun 24 10:14:56 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab today
from 10am to 4pm. |
|
|
15427
|
Wed Jun 24 17:20:16 2020 |
gautam | Update | LSC | What should the short-term commissioning goals be? | Per the discussion at the meeting today,
the plan of action is:
Lock the PRMI on carrier |
|
|
15428
|
Wed Jun 24 22:33:44 2020 |
gautam | Update | SUS | EQ tripped all suspensions | This
earthquake tripped all suspensions and
ITMX got stuck. The watchdogs were restored |
|
|
15429
|
Wed Jun 24 22:47:21 2020 |
Yehonathan | Update | Wiki | Updated phase maps webpage | I uploaded the new phase maps measurements
made by GariLynn to nodus and updated the
optics phase maps page.
I |
|
|
15430
|
Thu Jun 25 11:09:01 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab from
11pm to 4pm |
|
|
15431
|
Thu Jun 25 15:11:00 2020 |
gautam | Update | SUS | MC1 coil driver resistance quartered | I implemented this change today. We only
had 100 ohm, 3W resistors in stock (no 200
ohm with adequate power rating). Assuming |
|
|
15432
|
Fri Jun 26 11:00:52 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab today
from 11am to 4pm. |
|
|
15433
|
Fri Jun 26 16:53:38 2020 |
gautam | Update | Electronics | RFPD characterization | Summary:
While the vacuum system was knocked
out, I measured the RF transimpedance (using |
|
|
15434
|
Sun Jun 28 15:30:52 2020 |
gautam | Update | SUS | MC1 sat-box de-lidded | Judging by the summary
pages, some 18 hours after this
change was made and the board re-installed, |
|
|
15435
|
Sun Jun 28 16:29:58 2020 |
rana | Update | SUS | MC1 sat-box de-lidded | does the FLIR have an option to export
image with a colorbar?
How about just leave the lid open? |
|
|
15436
|
Sun Jun 28 17:36:35 2020 |
gautam | Update | SUS | MC1 sat-box de-lidded | Hmm I can't seem to export with the
colorbar, might be just my phone though.
I tried to add some "cursors" with |
|
|
15437
|
Mon Jun 29 11:41:04 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab today
from 11:30am to 4pm |
|
|
15438
|
Mon Jun 29 11:55:46 2020 |
gautam | Update | SUS | MC1 sat-box de-lidded | There was no improvement to the situation
overnight. So, I did the following today:
Ramped bias voltages for |
|