| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
15228
|
Wed Feb 26 22:09:52 2020 |
gautam | Summary | BHD | Projected IFO noise budget, post-BHD upgrade | The quantum noise curves here are not correct.
c.f. amplitude quadrature noise
budget. |
|
|
15229
|
Wed Feb 26 23:50:51 2020 |
gautam | Update | IOO | IMC checks | In the style of the KA characterization
of the CM board, the AO path gain EPICS slider
(IN2) of the IMC servo board was stepped |
|
|
15230
|
Thu Feb 27 15:50:37 2020 |
gautam | Update | Electronics | FSS box power cable removed | In 1X1, there is a box labelled "FSS
REF" below a KEPCO HV supply. This box
had a power cable that wasn't actually |
|
|
15231
|
Thu Feb 27 17:50:36 2020 |
gautam | Update | PSL | c1psl setup setup | [many people]
in prep for the install tomorrow,
we did the following: |
|
|
15232
|
Thu Feb 27 17:59:02 2020 |
gautam | Update | LSC | Some AO thoughts | While my checks of the AO signal path have
thrown up some unanswered questions, I don't
think there's any evidence in those measurements |
|
|
15233
|
Thu Feb 27 22:45:40 2020 |
gautam | Update | ALS | ALS noise high | There was some UNELOGGED work at EX today.
The DFD outputs were also hijacked for loss
measurement. Unclear |
|
|
15234
|
Fri Feb 28 08:05:22 2020 |
gautam | Update | PSL | c1psl setup setup | And so it begins.
|
|
|
15235
|
Fri Feb 28 10:04:41 2020 |
gautam | Update | PSL | c1psl setup setup | Summary:
There are several problems evident
already. |
|
|
15236
|
Fri Feb 28 19:37:18 2020 |
gautam | Update | PSL | New c1psl installed |
The new c1psl Acromag crate is
now interfaced to the Eurocrate electronics
in 1X1 (formerly VME c1psl) and 1X2 (formerly |
|
|
15237
|
Mon Mar 2 16:14:47 2020 |
gautam | Update | CDS | some target directory cleanup | $TARGET_DIR |
|
|
15238
|
Mon Mar 2 16:29:40 2020 |
gautam | Update | Electronics | c1psl VME crate removed, Acro-crate installed | [JV, JWR, YD, GV]
The old c1psl VME crate,
and all the ribbon cables connected to it |
|
|
15239
|
Mon Mar 2 16:35:12 2020 |
gautam | Update | CDS | c1psl test status | Channel |
|
|
15240
|
Mon Mar 2 19:32:41 2020 |
gautam | Update | CDS | c1rfm errors | Had to reboot both end machines and the
c1rfm model to get the TRX and TRY signals
to the LSC models. Now both arms can be locked |
|
|
15241
|
Mon Mar 2 23:49:03 2020 |
Jon | Summary | BHD | Projected IFO noise budget, post-BHD upgrade | Updated noise budget curves, now computed
using the latest version of pygwinc. This
resolves the inconsistency between the gwinc |
|
|
15242
|
Tue Mar 3 17:20:14 2020 |
gautam | Update | Electronics | More cabling removed | Jordan and I removed another 10 kg of cabling
from 1X2. The c1iool0 crate now has all cabling
to it disconnected - but it remains in the |
|
|
15243
|
Tue Mar 3 17:59:33 2020 |
Yehonathan | Update | Electronics | PSL Shutter and PMC TRANSPD working | I used existing BNC cables running from
the PSL table to the PSL rack and reassigned
them to the PSL Shutter and PMC transmission |
|
|
15244
|
Tue Mar 3 18:11:05 2020 |
Jon | Summary | BHD | Projected IFO noise budget, post-BHD upgrade | Revised noise estimates, correcting a couple
of factor of 2 and factor of pi errors found
in the coil driver noise calculation. Also |
|
|
15245
|
Tue Mar 3 19:11:48 2020 |
gautam | Update | LSC | Some locking prep |
Re-aligned and locked the arm cavities
for IR and green.
Re-set trans
normalization because after the c1iscex |
|
|
15246
|
Wed Mar 4 11:10:47 2020 |
Yehonathan | Update | Computers | Allegra revival | Allegra had no network cable and no mouse.
We found Allegra'snetwork cable (black)
and connected it. |
|
|
15247
|
Wed Mar 4 11:16:37 2020 |
gautam | Update | PSL | PMC realignment | I realigned the input pointing into the
PMC this morning. Usually, the way I do this
is to minimize any discernible mode structure |
|
|
15248
|
Wed Mar 4 12:25:11 2020 |
gautam | Update | CDS | BIO1 on c1psl is dead | There was some work done on the Acro crate
this morning. Unclear if this is independent,
but I found that the IMC servo board IN1 |
|
|
15249
|
Wed Mar 4 16:18:31 2020 |
gautam | Update | Electronics | More cabling removed | After discussing with Koji, I removed the
PZT driver and associated AI card from the
Eurocrate at 1X2. The corresponding backplane |
|
|
15250
|
Wed Mar 4 16:54:43 2020 |
gautam | Update | CDS | c1auxex temporarily disconnected | To debug a problem with the new c1psl (later
elog), we needed a Supermicro EPICS server
that was using the shared EPICS/modbus/asyn |
|
|
15251
|
Wed Mar 4 20:42:53 2020 |
gautam | Update | Electronics | C1PSL acromag crate is sitting on the floor | Jon is going to write up the details of
todays adventures. But
the C1PSL Acromag chassis is sitting on the |
|
|
15252
|
Wed Mar 4 21:02:49 2020 |
Koji | Update | Electronics | More cabling removed | We are going to replace the old Sun c1ioo
with a modernized supermicro. At the opportunity,
remove the DAC and BIO cards to use them |
|
|
15253
|
Wed Mar 4 22:38:31 2020 |
Jon | Update | PSL | c1psl communications problem resolved | I investigated the problem
reported earlier today with the BIO1 channels.
By logging the systemd messages generated |
|
|
15254
|
Thu Mar 5 11:27:48 2020 |
gautam | Update | Electronics | C1PSL acromag crate is no longer sitting on the floor | [jordan, gautam]
The C1PSL crate has now been installed |
|
|
15255
|
Thu Mar 5 15:03:48 2020 |
Yehonathan | Update | Electronics | PSL Shutter and PMC TRANSPD working | [Jon, Yehonathan]
Summary
With the Acromag chassis now permanently |
|
|
15256
|
Thu Mar 5 19:45:23 2020 |
Jon | Summary | PSL | C1PSL in-situ test results | We've completed
almost all of the in-situ testing of the
c1psl channels. During this |
|
|
15257
|
Thu Mar 5 19:51:14 2020 |
gautam | Update | Electronics | IMC Servo board being tested | I am running some tests on the IMC servo
board with an extender card so |
|
|
15258
|
Fri Mar 6 01:12:10 2020 |
gautam | Update | Electronics | IMC Servo IN2 path looks just fine | It seems like the AO path gain
stages on the IMC Servo board work just fine.
The weird results I reported earlier |
|
|
15259
|
Fri Mar 6 01:19:19 2020 |
gautam | Update | IOO | Excess laser frequency noise | Summary:
Sometime between 1PM and 6PM on
Tuesday, excess laser frequency noise |
|
|
15260
|
Fri Mar 6 16:33:11 2020 |
gautam | Update | IOO | Excess laser frequency noise | I did some preliminary debugging of this,
and have localized the problem to the output
path (after MC slow) on the IMC Servo card. |
|
|
15261
|
Sat Mar 7 15:18:30 2020 |
gautam | Update | SUS | EQ tripped some suspensions | An earthquake around 330 UTC (=730pm yesterday
eve) tripped ITMX, ITMY and ETMX watchdogs.
ITMX got stuck. I released the stuck optic |
|
|
15262
|
Tue Mar 10 14:30:16 2020 |
yehonathan | Update | SUS | | ETMX was grossly misaligned.
I re-aligned it and the X arm now
locks. |
|
|
15263
|
Tue Mar 10 19:58:16 2020 |
yehonathan | Update | SUS | | I returned the triggering threshold to
normal values (5/3).
|
|
|
15264
|
Tue Mar 10 19:59:09 2020 |
Yehonathan | Update | Loss Measurement | Arm transfer function measurement | I want to measure the transfer function
of the arm cavities to extract the pole frequencies
and get more insight into what is going |
|
|
15265
|
Wed Mar 11 16:46:25 2020 |
Hang | Update | IOO | MC2 coil balancing | My old scheme was flawed as I used pitch
as the readback. The pitch signal could not
distinguish the cross-coupling due to coil |
|
|
15266
|
Wed Mar 11 18:12:53 2020 |
gautam | Summary | PSL | WFS Demod board modifications | [koji, gautam]
|
|
|
15267
|
Wed Mar 11 21:03:57 2020 |
Koji | Update | BHD | SOS packages from Syracuse | I opened the packages send from Syracuse.
- The components are not vacuum
clean. We need C&B. |
|
|
15268
|
Thu Mar 12 01:33:21 2020 |
gautam | Update | LSC | Resuming locking activities | It's been a while since I've attempted
any locking, so tonight was mostly getting
the various subsystems back together. |
|
|
15269
|
Thu Mar 12 10:43:50 2020 |
rana | Update | Loss Measurement | Arm transfer function measurement |
|
|
|
15270
|
Thu Mar 12 11:10:49 2020 |
Yehonathan | Update | General | PMC got unlcoked | Came this morning to find the PMC was unlocked
since 6AM. Laser is still on, but PMC REFL
PD DC shows dead white constant 0V on PMC |
|
|
15271
|
Thu Mar 12 12:44:34 2020 |
gautam | Update | General | PMC got unlcoked | Of course the reboot wiped any logs we
could have used for clues as to what happened.
Next time it'll be good to preserve this |
|
|
15272
|
Thu Mar 12 16:13:16 2020 |
gautam | Update | PSL | Temperature sensors connected to Acromag | [jordan,
gautam] |
|
|
15273
|
Fri Mar 13 00:32:38 2020 |
gautam | Update | LSC | Some progress | Finally, some RF only CARM, see Attachment
#1. During this time, |
|
|
15274
|
Fri Mar 13 12:48:47 2020 |
Larry Wallace | Update | elog | Cert Renewal | Updated the cert in /etc/httpd/ssl.
The new cert is good until March 12, 2022. |
|
|
15275
|
Fri Mar 13 14:28:39 2020 |
gautam | Update | PSL | Added tees to PMC Trans and REFL | I want to monitor the PMC TRANS and
REFL levels on the PSL table - previously
there were some cables going to the oscilloscope |
|
|
15276
|
Fri Mar 13 20:00:50 2020 |
Jon | Update | Computers | Loopback monitoring for slow machines | Summary
Today
I finished implementing loopback monitors
of the up/down state of the slow controls |
|
|
15277
|
Mon Mar 16 15:23:03 2020 |
Yehonathan | Update | Loss Measurement | Arm transfer function measurement | I measured the cross-calibration of the
two PDs on the PSL table.
I used the existing flip mounted |
|