| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
15239
|
Mon Mar 2 16:35:12 2020 |
gautam | Update | CDS | c1psl test status | Channel |
|
|
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 |
|
|
15237
|
Mon Mar 2 16:14:47 2020 |
gautam | Update | CDS | some target directory cleanup | $TARGET_DIR |
|
|
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 |
|
|
15235
|
Fri Feb 28 10:04:41 2020 |
gautam | Update | PSL | c1psl setup setup | Summary:
There are several problems evident
already. |
|
|
15234
|
Fri Feb 28 08:05:22 2020 |
gautam | Update | PSL | c1psl setup setup | And so it begins.
|
|
|
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 |
|
|
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 |
|
|
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: |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
15227
|
Wed Feb 26 22:05:06 2020 |
gautam | Update | IOO | IMC checks | Today, I did the following tests (and so
was touching electronics/cables at/around
1X2): |
|
|
15226
|
Wed Feb 26 21:43:48 2020 |
Jon | Summary | BHD | Projected IFO noise budget, post-BHD upgrade | To supplement the material presented during
the BHD review, I've put together a projected
noise budget for the 40m. Note these are |
|
|
15225
|
Wed Feb 26 17:17:17 2020 |
Yehonathan | Update | | Arms DC loss measurements | {Yehonathan, Gautam}
In order to measure the loss in
the arm cavities in reflection, we use the |
6x |
|
15224
|
Tue Feb 25 19:58:06 2020 |
Hang | Update | IOO | MC2 coil balancing | [Yehonathan, Hang]
We did some quick DC balancing
of the MC2 coil drivers to reduce the l2a |
|
|
15223
|
Tue Feb 25 16:17:57 2020 |
Gautam, Hang | Update | CDS | | Seems that the GPS is out of sync on donatella.
We could not get any data from diaggui... |
|
|
15222
|
Mon Feb 24 08:36:32 2020 |
Chub | Update | General | HVAC repair | The HVAC people replaced a valve and repaired
the pneumatic plumbing on the roof air handler.
Temperature has been stable during the day |
|
|
15221
|
Sun Feb 23 18:15:22 2020 |
rana | Update | ALS | ALS OOL noise and PDH | to
make the comparisons meaningfully |
|
|
15220
|
Fri Feb 21 20:44:18 2020 |
shruti | Update | ALS | ALS OOL noise and PDH | [Meenakshi, Shruti]
In order to adjust the relative
phase for PDH locking, we used the Siglent |
|
|
15219
|
Fri Feb 21 13:02:53 2020 |
Koji | Update | ALS | PDH error signals? | Check out this elog:
ELOG
4354 |
|
|
15218
|
Fri Feb 21 10:59:08 2020 |
shruti | Update | ALS | PDH error signals? | |
|
|
15217
|
Wed Feb 19 22:20:22 2020 |
rana | Update | ALS | ALS OOL noise with arms locked | Could you please put physical units on
the Y-axis and also put labels in the legend
which give a physical description of what |
|
|
15216
|
Tue Feb 18 18:14:59 2020 |
shruti | Update | ALS | ALS OOL noise with arms locked | We proceeded with the trying to measure
the ALS out-of-loop noise of the X arm when
the X arm cavity is green-locked using different |
|
|
15215
|
Sat Feb 15 12:56:24 2020 |
Yehonathan | Update | IOO | IMC Transfer function measurement | {Yehonathan, Meenakshi}
We measure the IMC transfer function
using SR785. |
|
|
15214
|
Fri Feb 14 14:52:41 2020 |
gautam | Update | ALS | ALS OOL noise with arms locked | Unlikely, the alignment was probably just
not good. I restored the alignment and now
the arms can be locked to IR frequency. |
|
|
15213
|
Fri Feb 14 14:02:13 2020 |
shruti | Update | ALS | ALS OOL noise with arms locked | [Meenakshi, Shruti]
Even though we were not able to
lock the the IR beat (by enabling LSC) during |
|
|
15212
|
Fri Feb 14 00:53:50 2020 |
gautam | Update | ALS | Fast ALS - more setup | In the process of setting up some cabling
at 1Y2, I must've bumped a cable to the
c1lsc expansion chassis. Anyways, the c1lsc |
|
|
15211
|
Thu Feb 13 21:30:55 2020 |
shruti | Update | ALS | ALS OOL noise with arms locked | [Meenakshi, Gautam, Shruti]
Summary:
- We initially aligned the arm |
|
|
15210
|
Thu Feb 13 02:07:26 2020 |
gautam | Update | LSC | AO path transfer function measurement | Summary:
I measured the transfer function
of the AO path, and think that there are |
|
|
15209
|
Thu Feb 13 01:47:39 2020 |
gautam | Update | ALS | Fast ALS - delay line prep | A few years ago, Koji and I setup a delay
line phase shifter, which can be used to
impart a (switchable) delay to a signal path. |
|
|
15208
|
Wed Feb 12 12:13:37 2020 |
gautam | Update | LSC | AO path attempts | Summary:
The
PRFPMI can be controlled by a mix of ALS |
|
|
15207
|
Tue Feb 11 19:11:35 2020 |
shruti | Update | Computer Scripts / Programs | MATLAB on donatella | Tried to open MATLAB on Donatella and found
the error:
MATLAB is selecting |
|
|
15206
|
Tue Feb 11 16:39:00 2020 |
shruti | Update | ALS | AM/PM | The results of the AM/PM measurements:
Attachment 1: Traces
of 9 AM TFs overlaid on top of each other, |
|
|
15205
|
Mon Feb 10 15:55:46 2020 |
Jordan | Update | PSL | PMCTRANSPD | [Gautam, Jordan]
Gautam showed me how the PMCTRANSPD
signal was reading zero, and he suspected |
|
|
15204
|
Mon Feb 10 15:54:47 2020 |
Jordan | Update | PSL | Completed Acromag Wiring | All spare channels on the PSL acromag chassis
are connected with ~12in of spare wiring
for future use. |
|
|
15203
|
Mon Feb 10 15:04:42 2020 |
Jordan | Update | General | HDMI Routing for new tv | Ran HDMI to the new tv mounted on the north
wall of control room. |
|
|
15202
|
Mon Feb 10 10:07:20 2020 |
gautam | Update | PSL | PMC re-locked | I found the PMC unlocked this morning.
It was re-locked using the usual procedure.
I feel like this has been happening more |
|