| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
14314
|
Wed Nov 21 16:48:11 2018 |
gautam | Update | COC | EY mini cleanroom setup | With Chub's help, I've setup a
mini cleanroom at EY - Attachment
#1. The HEPA unit is running on |
|
|
14315
|
Sun Nov 25 17:41:43 2018 |
Jon | Omnistructure | | Vacuum Controls Upgrade - Status and Plans | New hardware has been installed in the
vacuum controls rack. It is shown in the
below post-install photo. |
|
|
14316
|
Mon Nov 26 10:22:16 2018 |
aaron | Update | General | projector light bulb replaced | I replaced the projector bulb. Previous
bulb was shattered. |
|
|
14317
|
Mon Nov 26 15:43:16 2018 |
aaron | Update | OMC | OMC scanning/aligning script | I've started testing the OMC channels
I'll use.
I needed to update the model, because |
|
|
14318
|
Mon Nov 26 15:58:48 2018 |
Steve | Update | VAC | Vent 81 | Gautam, Aaron, Chub & Steve,
ETMY heavy door replaced by light
one. |
|
|
14319
|
Mon Nov 26 17:16:27 2018 |
gautam | Update | SUS | EY chamber work | [steve,
rana, gautam]
PSL and EY 1064nm laser |
|
|
14320
|
Mon Nov 26 21:58:08 2018 |
Jon | Omnistructure | | Serial Vacuum Signals | All the serial vacuum signals are now interfaced
to the new digital controls system. A set
of persistent Python scripts will query each |
|
|
14321
|
Tue Nov 27 10:50:20 2018 |
Steve | Update | PEM | earth quake Mexico | Nothing tripped.
|
|
|
14322
|
Tue Nov 27 17:06:51 2018 |
Steve | Configuration | VAC | Agilent 84FS turbo installed as TP2 | Chub & Steve, |
|
|
14323
|
Thu Nov 29 08:13:33 2018 |
Steve | Update | PEM | EQ 3.9m So CA | EQ did not trip anything. atm1
Just
a REMINDER:
our vacuum system is at atm to help the vacuum |
|
|
14324
|
Thu Nov 29 17:46:43 2018 |
gautam | Update | General | Some to-dos | [koji,
gautam, jon, steve]
We suspect analog voltage |
|
|
14325
|
Fri Nov 30 15:53:52 2018 |
Jon | Omnistructure | General | N2 pressure gauge fix | I've made a repair to the N2 pressure
monitor. I don't believe the polarity
of the analog signal into the controller |
|
|
14326
|
Fri Nov 30 19:37:47 2018 |
gautam | Update | LSC | LSC feedforward block diagram | I wanted to set up an RTCDS model to understand
this problem better. Attachment #1 is the
simulink diagram of the signal flow. The |
|
|
14327
|
Sun Dec 2 16:08:44 2018 |
Jon | Omnistructure | Upgrade | Feedthroughs for Vacuum Acromag Chassis | Below is an inventory of the signal
feedthroughs that need to be installed on
the vacuum Acromag crate this week. |
|
|
14328
|
Sun Dec 2 17:26:58 2018 |
gautam | Update | IMC | IMC ringdown fitting | Recently we wondered at the meeting what
the IMC round trip loss was. I had done several
ringdowns in the winter of 2017, but because |
|
|
14329
|
Sun Dec 2 19:32:35 2018 |
rana | Update | IOO | fit times | need to vary start/stop times in fit to
test for systematics |
|
|
14330
|
Tue Dec 4 10:38:12 2018 |
Jon | Omnistructure | Upgrade | Updated Feedthrough List for Vacuum Acromag Chassis | Based on new input from Chub, attached
is the revised list of signal cable
feedthroughs needed on the vacuum system |
|
|
14331
|
Tue Dec 4 18:24:05 2018 |
gautam | Omnistructure | General | N2 line disconnected | [jon, gautam]
In the latest installment in this
puzzler: turns out that maybe the trend of |
|
|
14332
|
Thu Dec 6 11:16:28 2018 |
aaron | Update | OMC | OMC channels | I need to hookup +/- 24 V supplies to the
OMC whitening/dewhitening boxes that have
been added to 1X2. |
|
|
14333
|
Thu Dec 6 17:33:33 2018 |
Jon | Omnistructure | General | N2 line disconnected | I believe I finally have the N2 gauge working
correctly. The wiring is unchanged from its
original state and the controller has been |
|
|
14334
|
Fri Dec 7 12:51:06 2018 |
gautam | Update | IMC | IMC ringdown fitting | I started putting together some code to
implement some ideas we discussed at the
Tuesday meeting here. Pipeline isn't |
|
|
14335
|
Fri Dec 7 17:04:18 2018 |
gautam | Update | IOO | IMC transmission |
Power just before PSL shutter on
PSL table = 97 |
|
|
14336
|
Fri Dec 7 19:42:47 2018 |
rana | Frogs | elog | can't upgrade DokuWiki because of PHP / SL7 | All of our wikis (except the 40m one which
unfortunately got turned into ligo.org mess)
use DokuWiki. This now has an auto-upgrade |
|
|
14337
|
Mon Dec 10 12:11:28 2018 |
aaron | Update | OMC | Aligning the OMC | I did some ray tracing and determined that
the aux beam will enter the OMC after losing
some power in reflection on OMPO (couldn't |
|
|
14338
|
Mon Dec 10 12:29:05 2018 |
aaron | Update | OMC | OMC channels | I kept having trouble keeping the power
LEDs on the dewhitening board 'on'.
I did the following: |
|
|
14339
|
Mon Dec 10 15:53:16 2018 |
gautam | Update | LSC | Swept-sine measurement with DTT | Disclaimer:
This is almost certainly some user error |
|
|
14340
|
Mon Dec 10 19:47:06 2018 |
aaron | Update | OMC | OMC channels | Taking another look at the datasheet, I
don't think LM7812 is an appropriate
replacement and I think the LM2940CT-12 |
|
|
14341
|
Tue Dec 11 13:42:44 2018 |
Koji | Update | OMC | OMC channels | FYI:
D050368 Anti-Imaging Chassis
https://dcc.ligo.org/LIGO-D050368 |
|
|
14342
|
Tue Dec 11 13:48:04 2018 |
aaron | Update | OMC | OMC channels | Koji gave me some tips on testing this
board that I wanted to write down, notes
probably a bit intermingled with my thoughts. |
|
|
14343
|
Tue Dec 11 14:24:18 2018 |
aaron | Update | OMC | Aligning the OMC | I set up a function generator to drive
OMC-L, and have the two DCPD mons and the
OMC REFL PD sent to an oscilloscope. I need |
|
|
14344
|
Tue Dec 11 14:33:29 2018 |
gautam | Update | CDS | NDScope | NDscope is now running on pianosa. To be
really useful, we need the templates, so
I've made |
|
|
14345
|
Tue Dec 11 18:20:59 2018 |
gautam | Update | Optical Levers | BS/PRM HeNe is dead | I found that the BS/PRM OL SUM channels
were reading close to 0. So I went to the
optical table, and found that there was no |
|
|
14346
|
Tue Dec 11 22:50:07 2018 |
aaron | Update | OMC | Aligning the OMC | I did the following:
Noticed that the OMC rack's
power has +-18V, but I had tested |
6x |
|
14347
|
Wed Dec 12 11:53:29 2018 |
aaron | Update | General | Power Outage | At 11:13 am there was a ~2-3 second interruption
of all power at the 40m.
I checked that nobody was in any |
|
|
14348
|
Wed Dec 12 18:27:07 2018 |
Jon | Omnistructure | Upgrade | Analog signals, A/D Acromag added to vacuum system | There turned out to be a few analog signals
for the vacuum system after all. The TP2/3
foreline pressure gauges were never part |
|
|
14349
|
Thu Dec 13 01:26:34 2018 |
gautam | Update | General | Power Outage recovery | [koji,
gautam]
After several combinations of soft/hard |
|
|
14350
|
Thu Dec 13 10:03:07 2018 |
Chub | Update | General | OMC chamber | Bob, Aaron, and I removed the door from
the OMC chamber this morning. Everything
went well. |
|
|
14351
|
Thu Dec 13 12:06:35 2018 |
gautam | Update | General | Power Outage recovery | I did a walkaround and checked the status
of all the interlock switches I could find
based on the SOP |
|
|
14352
|
Thu Dec 13 18:12:47 2018 |
gautam | Update | IOO | ND filter on AS camera changed | In order to see the AS beam a bit more
clearly in our low-power config, I swapped
out the ND=1.0 filter on the AS camera for |
|
|
14353
|
Thu Dec 13 20:10:08 2018 |
Koji | Update | General | Power Outage recovery | [Gautam, Aaron, Koji]
The PSL interlock system
was fixed and now the 40m lab is laser hazard |
|
|
14354
|
Thu Dec 13 22:24:21 2018 |
aaron | Update | OMC | OMC channels | I completed testing of the AI board mentioned
above. In addition to the blown fuse, there
were two problems: |
|
|
14355
|
Thu Dec 13 22:36:42 2018 |
aaron | Update | OMC | Aligning the OMC | I turned on AUX, and aligned the aux beam
to be centered on the first optic the AS
beam sees on the AP table. I then turned |
|
|
14356
|
Thu Dec 13 22:56:28 2018 |
gautam | Update | CDS | Frames | [koji, gautam]
We looked into the /frames situation
a bit tonight. Here is a summary: |
|
|
14357
|
Fri Dec 14 13:02:24 2018 |
aaron | Update | OMC | Aligning the OMC | I replaced the 2'' AUX-AS combining
BS with a 2'' HR mirror for 1064.
I aligned the AUX beam from the new HR mirror |
|
|
14358
|
Fri Dec 14 13:06:12 2018 |
aaron | Update | OMC | Aligning the OMC | I replaced the 2'' AUX-AS combining
BS with a freshly mounted 2'' HR
mirror for 1064. The mirror is labelled 'Y1-2037-45-P', |
|
|
14359
|
Fri Dec 14 14:25:36 2018 |
Koji | Update | CDS | chiara backup | fsck of chiara backup disk (UUID="90a5c98a-22fb-4685-9c17-77ed07a5e000")
was done. But this required many files to
be fixed. So the backed-up files are not |
|
|
14360
|
Fri Dec 14 22:19:22 2018 |
Koji | Update | General | Chiara new USB 4TB DIsk | Edit:
It was not 4TB |
|
|
14361
|
Sat Dec 15 18:29:53 2018 |
Koji | Update | General | Chiara new USB 4TB DIsk | The local backup was done at 18:18
after 11h18m of running.
|
|
|
14362
|
Sat Dec 15 20:04:03 2018 |
gautam | Update | IOO | TT1/TT2 stepping | I'm running a script that moves TT1
and TT2 randomly in some restricted P/Y space
to try and find an alignment that gets some |
|
|
14363
|
Mon Dec 17 20:45:40 2018 |
aaron | Update | OMC | Aligning the OMC | [gautam, aaron]
We did work in the OMC chamber
today to get the OMC aligned. Aaron was in |
|