| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
14813
|
Thu Jul 25 20:08:36 2019 |
gautam | Update | Computers | Solidworks machine | I brought one CPU (Dell T3500) and one
28" monitor from Mike Pedraza's
office in Downs to the 40m. It is on Steve's |
|
|
2003
|
Fri Sep 25 17:51:51 2009 |
Koji | Update | MOPA | Solved (Re: Total MOPA power is constant, but the NPRO's power has decreased after last night's activities?) | Jenne, Koji
The cause of the decrease was found
and the problem was solved. We found this |
|
|
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 |
|
|
9784
|
Thu Apr 3 18:55:10 2014 |
ericq | Summary | LSC | Some CARM related modeling | The other day, Jenne and I were comparing
my MIST simulation to her Optickle simulation
for the CARM transfer functions I posted |
|
|
15017
|
Wed Nov 6 19:26:57 2019 |
gautam | Update | PSL | Some PSL cable admin | Koji and I taked about cleaning up some
of the flaky cable situation on the PSL table
a while ago. The changes were implemented |
|
|
4034
|
Thu Dec 9 01:54:15 2010 |
Jenne | Update | Electronics | Some Refl 11 fixes | The
Backstory:
Kevin was working on characterizing |
|
|
10656
|
Fri Oct 31 02:19:37 2014 |
ericq | Update | LSC | Some SRMI progress | Earlier today, I did some simulations that
suggested that PRC lengths on the order of
a cm from our current estimated one could |
|
|
9654
|
Wed Feb 19 11:00:16 2014 |
ericq | Update | LSC | Some Simulation Efforts | Q EDIT: THIS
IS WRONG. I LOCKED PRC ON THE CARRIER
As
Koji measured the other day: MICH and |
|
|
9656
|
Wed Feb 19 14:14:46 2014 |
ericq | Update | LSC | Some Simulation Efforts | Q EDIT: THIS
IS WRONG. I LOCKED PRC ON THE CARRIER
Koji
noted oddities in the sensing matrix results |
|
|
9657
|
Wed Feb 19 16:42:08 2014 |
ericq | Update | LSC | Some Simulation Efforts | Disregard previous
ELOGs, I had the PRC locked on carrier |
|
|
3249
|
Tue Jul 20 11:49:31 2010 |
Jenne | Update | SUS | Some Suspensions not damping | [Jenne, Koji]
I moseyed into the control room this
morning, to find ITMX and ITMY both with |
|
|
14397
|
Fri Jan 11 16:38:57 2019 |
gautam | Update | General | Some alignment checks | The pumpdown seems to be progressing smoothly,
so I think we are going to stick with the
plan decided on Wednesday, and vent the IFO |
|
|
15620
|
Thu Oct 8 15:08:25 2020 |
gautam | Update | General | Some boxes moved from 40m entry hallway |
UPS batteries
2x HEPA
filters
VWR chemicals (methanol)
These
boxes were moved from the 40m hallway to |
|
|
3172
|
Wed Jul 7 22:22:49 2010 |
Jenne | Update | Computers | Some channels not being recorded!!! | [Rana, Jenne]
We discovered |
|
|
3176
|
Thu Jul 8 14:11:16 2010 |
josephb | Update | Computers | Some channels not being recorded!!! | This has been fixed,
thanks to some help from Alex. It doesn't |
|
|
3179
|
Thu Jul 8 15:43:58 2010 |
rana | Update | Computers | Some channels not being recorded!!! |
|
|
|
314
|
Wed Feb 13 11:41:00 2008 |
Alberto | Update | Electronics | Some characterization of the RF Monitor Box (StocMon) | I'm attaching a table with some measurements
and the power spectrum from the pd to help
evaluate the numbers.
|
|
|
9613
|
Fri Feb 7 17:52:41 2014 |
Koji | Summary | General | Some cleaning up |
Adjusted the PMC alignment
Adjusted the IMC length offsets for
the MC servo and the FSS servo
|
|
|
3221
|
Wed Jul 14 18:09:50 2010 |
josephb, razib | Update | Phase Camera | Some cleanup behind 1Y2 rack of phasecamera electronics | We made an attempt at cleaning up the phase
camera setup electronics.
We have moved a portion of the electronics |
|
|
17170
|
Mon Oct 3 13:11:22 2022 |
Yehonathan | Update | BHD | Some comparison of LO phase lock schemes | I pushed a notebook and a Finesse model
for comparing different LO phase locking
schemes. Notebook is on https://git.ligo.org/40m/bhd/-/blob/master/controls/compare_LO_phase_locking_schemes.ipynb, |
|
|
1404
|
Sun Mar 15 21:50:29 2009 |
Kakeru, Kiwamu, Osamu | Update | Computers | Some computers are rebooted | We found c1lsc, c1iscex, c1iscey, c1susvme,
c1asc and c1sosvme are dead.
We turned off all watchdogs |
|
|
6105
|
Mon Dec 12 11:34:40 2011 |
Leo Singer | Summary | General | Some design parameters for a Stewart platform | At the suggestion of Rana and Koji, I have
worked out some design parameters for a Stewart
platform to be used as a vibration isolation |
|
|
9742
|
Fri Mar 21 01:54:32 2014 |
ericq | Update | LSC | Some early CARM modeling | I've been getting a simulation going
with the eventual goal of simulating CESAR-type
signals for CARM. So for I've only been using |
7x |
|
15347
|
Tue May 26 01:58:57 2020 |
gautam | Update | Electronics | Some electronics thoughts | A big factor in how much IFO locking activities
can take place is how cooperative the IMC
is. |
|
|
15514
|
Tue Aug 11 23:20:29 2020 |
gautam | Update | BHD | Some first tests with air BHD setup | Some tests done today:
All of these tests were done with
the PRMI locked with carrier resonant in |
|
|
11998
|
Thu Feb 18 02:52:27 2016 |
ericq | Update | IOO | Some housekeeping | I manually aligned the IMC. Spot positions
are all < 1.5mm. PMC trans of ~0.74, MC2
Trans of ~15400, MC Refl ~0.4, which is better |
|
|
15308
|
Mon Apr 20 17:49:58 2020 |
gautam | Update | General | Some housekeeping |
Empty
N2 replaced.
Logged back into zita and started |
|
|
15606
|
Thu Oct 1 17:44:48 2020 |
gautam | Update | General | Some inventory notes | The optomechanics stock in the lab was
in a sad state. We have obtained the following
from Thorlabs in the last two months: |
|
|
5980
|
Tue Nov 22 18:42:10 2011 |
kiwamu | Summary | Green Locking | Some issues on the Y end green PDH locking | [Rana / Kiwamu]
As
a part of the ALS noise budgeting we took |
|
|
5983
|
Wed Nov 23 00:00:53 2011 |
Zach | Summary | Green Locking | Some issues on the Y end green PDH locking |
|
|
|
1264
|
Mon Feb 2 17:25:44 2009 |
Alberto | Configuration | General | Some little problem with the new elog | For some reason the new elog does not look
exactly like it should.
1) Some of the
editing features are not available.
2) |
|
|
1265
|
Mon Feb 2 18:32:54 2009 |
Alberto | Configuration | General | Some little problem with the new elog |
|
|
|
1969
|
Mon Sep 7 23:18:01 2009 |
Alberto | Update | Locking | Some locking attempts | Tried
to lock the interferometer but arm power
didn't get over 65. |
|
|
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 |
|
|
10992
|
Tue Feb 10 02:40:54 2015 |
Jenne | Update | LSC | Some locking thoughts on PRMI | [EricQ, Jenne]
We wanted to make the PRMI lock
more stable tonight, which would hopefully |
|
|
10994
|
Tue Feb 10 03:09:02 2015 |
ericq | Update | LSC | Some locking thoughts on PRMI | Unfortunately, we only had one good CARM
offset reduction to powers of about 25, but
then my QPD loop blew it. We spent the vast |
|
|
10659
|
Fri Oct 31 19:59:26 2014 |
Koji | Update | General | Some locking work / PRMI analysis | Preparations
- According to Diego's report, the
MC WFS gains were too high. We'll fix this |
|
|
10917
|
Sat Jan 17 01:10:36 2015 |
Jenne | Update | LSC | Some locking, may need to modify UGF part again | I have been playing with the IFO tonight.
Mostly, I wanted to make sure that all of
the scripts for the carm_cm_up sequence were |
|
|
10926
|
Tue Jan 20 21:58:04 2015 |
diego | Update | LSC | Some locking, may need to modify UGF part again |
|
|
|
10725
|
Tue Nov 18 15:20:58 2014 |
Jenne | Update | LSC | Some lockloss plots from PRFPMI | Elog from ~5am last night:
Tonight was just several trials
of PRFPMI locking, while trying to pay more |
8x |
|
10726
|
Tue Nov 18 17:11:30 2014 |
Jenne | Update | LSC | Some lockloss plots from PRFPMI | I am still staring at / trying to figure
out the latter 4 locklosses posted earlier.
But, I have just included the transmission |
|
|
11182
|
Tue Mar 31 02:51:39 2015 |
ericq | Update | LSC | Some locks | I had a handful of ~10 minute locks tonight.
I intended to work on the 1f PRMI transition,
but ended just familiarizing myself with |
|
|
11183
|
Tue Mar 31 03:02:44 2015 |
Koji | Update | LSC | Some locks | Assuming the carrier mode in PRC is stable
and the SB is the one moving, can we just
use the POP DC QPD to control PRM? |
|
|
11185
|
Tue Mar 31 18:27:58 2015 |
ericq | Update | LSC | Some locks |
|
|
|
3115
|
Thu Jun 24 13:02:59 2010 |
Jenne | Update | Computers | Some lunchtime reboots | [Jenne, Megan, Frank]
We rebooted c1iovme, c1susvme1, and
c1susvme2 during lunch. Frank is going |
|
|
11171
|
Wed Mar 25 18:27:34 2015 |
Koji | Summary | General | Some maintainance | - I found that the cable for the AS55 LO
signal had the shielding 90% broken. It was
fixed. |
|
|
11286
|
Tue May 12 12:04:41 2015 |
manasa | Update | General | Some maintenance | * Relocked IMC. I guess
it was stuck somewhere in the autlocker loop.
I disabled autolocker and locked it manually. |
|
|
1541
|
Sun May 3 22:48:12 2009 |
Yoichi | Update | Locking | Some measurements at the lock point | I attached some measurement results at when
the IFO is at the full lock point.
|
|
|
11063
|
Wed Feb 25 04:21:58 2015 |
ericq | Update | CDS | Some model updates | I changed the suspension library block
to acquire the SUS_[optic]_LSC_OUT channels
at 16k for sensing matrix investigations. |
|
|
10499
|
Fri Sep 12 03:49:57 2014 |
ericq | Update | LSC | Some more PRFPMI efforts | Since DRMI didn't get fully commissioned,
I tried my hand at PRFPMI locking with the
newly improved ALS performance. |
|