| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
14295
|
Wed Nov 14 18:58:35 2018 |
aaron | Update | DAQ | New DAC for the OMC | I began moving the AA and AI chassis over
to 1X1/1X2 as outlined in
the elog. |
|
|
14297
|
Thu Nov 15 10:21:07 2018 |
aaron | Update | IOO | IMC problematic | I ran a BNC from the PD on the AS table
along the cable rack to a free ADC channel
on the LSC whitening board. I lay the BNC |
|
|
14298
|
Fri Nov 16 00:47:43 2018 |
gautam | Update | LSC | More DRMI characterization | Summary:
More DRMI characterization
was done.
I was working on trying |
|
|
14299
|
Fri Nov 16 10:26:12 2018 |
Steve | Update | VAC | single viton O-rings | The 40m vacuum envelope has one large single
O-ring on the OOC west side. All other doors
have double O-ring with annuloses. |
|
|
14300
|
Fri Nov 16 10:53:07 2018 |
aaron | Update | IOO | IMC problematic | Back to loss measurements.
I replaced the PD I've been
using for the AS beam. |
|
|
14302
|
Sat Nov 17 18:59:01 2018 |
aaron | Update | IOO | IMC problematic | I made additional measurements on the x
and y arms, at 5 offset positions for each
arm (along with 6 measurements at the "zeroed" |
|
|
14303
|
Sun Nov 18 00:59:33 2018 |
gautam | Update | General | Vent prep | I've begun prepping the IFO for the
vent, and completed most of the IFO related
items on the checklist. |
|
|
14304
|
Sun Nov 18 17:09:02 2018 |
gautam | Update | General | Vent prep | Vent prep
Following the checklist,
I did these: |
|
|
14305
|
Mon Nov 19 14:59:48 2018 |
Chub | Update | VAC | Vent 81 | Vent 80 is nearly complete; the instrument
is almost to atmosphere. All four ion
pump gate valves have been disconnected, |
|
|
14306
|
Mon Nov 19 17:09:00 2018 |
Steve | Update | VAC | Vent 81 | Gautam, Aaron, Chub and Steve,
|
|
|
14307
|
Mon Nov 19 22:01:50 2018 |
gautam | Update | VAC | Loose nut on valve | As I was turning off the lights in the
VEA, I heard a rattling sound from near the
PSL enclosure. I followed it to a valve - |
|
|
14310
|
Tue Nov 20 13:13:01 2018 |
gautam | Update | VAC | IMC alignment is okay | I checked the IMC alignment following the
vent, for which the manual beam block placed
on the PSL table was removed. The alignment |
|
|
14311
|
Tue Nov 20 17:38:13 2018 |
rana | Update | Upgrade | New Coffee Machine | Rana, Aaron, Gautam
The |
|
|
14312
|
Tue Nov 20 20:33:11 2018 |
aaron | Update | OMC | OMC scanning/aligning script | I finished running the cabling for the
OMC, which involved running 7x 50ft DB9 cables
from the OMC_NORTH rack to the 1X2 rack, |
|
|
14313
|
Wed Nov 21 09:59:26 2018 |
gautam | Update | LSC | LSC feedforward block diagram | Attachment
#1 is a block diagram depicting
the pathway by which the vertex DOF control |
|
|
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 |
|
|
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 |
|
|
14321
|
Tue Nov 27 10:50:20 2018 |
Steve | Update | PEM | earth quake Mexico | Nothing tripped.
|
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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', |
|