| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
11876
|
Fri Dec 11 23:12:09 2015 |
Koji | Summary | COC | Loss map measurement document | Yutaro left detailed slides for his loss
map measurement
https://dcc.ligo.org/LIGO-G1501547 |
|
|
12102
|
Mon May 2 17:06:58 2016 |
rana | Summary | COC | G&H optics to Fullerton/HWS for anneal testing | Steve sent 4 of our 1" diameter G&H
HR mirrors to Josh Smith at Fullerton for
scatter testing. Attached photo is our total |
|
|
12103
|
Mon May 2 17:11:55 2016 |
rana | Update | COC | RC folding mirrors | Antonio/Gautam
are now developing a more up to date Finesse
model of our recycling cavities to see what |
|
|
12120
|
Wed May 18 01:10:22 2016 |
gautam | Update | COC | Finesse modelling | I've been working on putting together
a Finesse model for the current 40m configuration.
The idea was to see if I could reproduce |
|
|
12130
|
Tue May 24 22:49:02 2016 |
gautam | Update | COC | Finesse modelling - mode overlap scans | Summary:
Having played around with a toy finesse
model, I went about setting up a model in |
9x |
|
12131
|
Tue May 24 23:17:37 2016 |
ericq | Update | COC | Finesse modelling - mode overlap scans | I think you should use the current actual
PRC & SRC cavity lengths as measured,
as it would be simplest to simply replace |
|
|
12190
|
Thu Jun 16 15:57:46 2016 |
gautam | Update | COC | Contrast as a function of RoC of ETMX | Summary
In a previous elog, I demonstrated
that the RoC mismatch between ETMX and |
|
|
12193
|
Thu Jun 16 18:42:12 2016 |
rana | Update | COC | Contrast as a function of RoC of ETMX | That sounds weird. If the ETMY RoC |
|
|
12194
|
Thu Jun 16 23:02:57 2016 |
gautam | Update | COC | Contrast as a function of RoC of ETMX |
|
|
|
12197
|
Mon Jun 20 01:38:04 2016 |
rana | Update | COC | Contrast as a function of RoC of ETMX | So, it seems that changing the ETMX for
one of the spares will change the contrast
defect from ~0.1% to 0.9%. True? Seems like |
|
|
12204
|
Mon Jun 20 18:07:15 2016 |
gautam | Update | COC | Contrast as a function of RoC of ETMX |
|
|
|
12219
|
Tue Jun 28 16:06:09 2016 |
gautam | Update | COC | RC folding mirrors - further checks | Having investigated the mode-overlap as
a function of RoC of the PRC and SRC folding
mirrors, I've now been looking into possible |
|
|
12223
|
Tue Jun 28 20:43:23 2016 |
Koji | Summary | COC | First Contact cleaning practice | Made a dry run of the in-situ cleaning
for a 3inch optic.
Attachment 1: The Al dummy mass |
7x |
|
12234
|
Thu Jun 30 16:21:32 2016 |
gautam | Update | COC | Sideband HOMs resonating in arms | [EricQ, gautam]
Last night, we set about trying
to see if we could measure and verify the |
|
|
12325
|
Fri Jul 22 03:02:37 2016 |
Koji | Update | COC | FC painting | [Koji Gautam]
We have worked on the FC painting
on ITMX and ITMY. We |
11x |
|
12407
|
Sat Aug 13 18:25:22 2016 |
gautam | Update | COC | RC folding mirrors - Numerical review | This elog
is meant to summarize my numerical simulations
for looking into the effects of curvature |
|
|
12413
|
Tue Aug 16 11:51:43 2016 |
gautam | Update | COC | RC folding mirrors - Numerical review | Summary of roundtable meeting yesterday
between EricG, EricQ, Koji and Gautam:
We identified two possible courses |
|
|
12414
|
Tue Aug 16 16:38:00 2016 |
gautam | Update | COC | RC folding mirrors - Numerical review | Here are the results for case 2: (flat
PR3/SR3, for purpose of simulation, I've
used a concave mirror with RoC in the range |
|
|
12417
|
Wed Aug 17 14:37:36 2016 |
gautam | Update | COC | RC folding mirrors - Numerical review |
|
|
|
12418
|
Wed Aug 17 16:28:46 2016 |
Koji | Update | COC | RC folding mirrors - Numerical review | For the given range of the PR3/SR3 RoCs
for both cases, all the resulting numbers
such as TMSs/mode matching ratios look reasonable |
|
|
12631
|
Mon Nov 21 15:34:24 2016 |
gautam | Update | COC | RC folding mirrors - updated specs |
p.p1 {margin:
0.0px 0.0px 0.0px 0.0px; font: 12.0px 'Helvetica
Neue'; -webkit-text-stroke: #000000}
li.li1 |
|
|
12847
|
Thu Feb 23 10:59:53 2017 |
gautam | Update | COC | RC folding mirrors - coating optimization | I've now made
a |
|
|
12887
|
Tue Mar 14 10:56:33 2017 |
gautam | Update | COC | RC folding mirrors - coating optimization | Rana suggested including some additional
terms to the cost function to penalize high
sensitivity to deviations in the layer thickness |
|
|
12936
|
Mon Apr 10 15:37:11 2017 |
gautam | Update | COC | RC folding mirrors - v3 of specs uploaded | Koji and I have been going over these calculations
again before we send a list of revised requirements
to Ramin. I've uploaded v3 of the specs |
8x |
|
13155
|
Mon Jul 31 23:39:02 2017 |
rana | Update | COC | Cavity Scan Simulation Code | Hiro Yamamoto has updated SIS (Static Interferometer
Simulation) to allow us to do the MCMC based
inference of the 40m arm cavity mirror maps. |
|
|
14148
|
Thu Aug 9 02:12:13 2018 |
gautam | Update | COC | South East or West? | Summary:
For operating the SRC in the "Signal-Recycled"
tuning, the SRC macroscopic length needs |
|
|
14164
|
Wed Aug 15 12:15:24 2018 |
gautam | Update | COC | Macroscopic SRC length for SR tuning | Summary:
It |
|
|
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 |
|
|
15374
|
Thu Jun 4 00:21:28 2020 |
Koji | Summary | COC | ITM spares and New PR3 mirrors transported to Downs for phasemap measurement | GariLynn worked on the measurement of E1800089
mirrros.
|
|
|
15401
|
Tue Jun 16 13:05:36 2020 |
Koji | Update | COC | ITM spares and New PR3 mirrors transported to Downs for phasemap measurement | ITMU01 / ITMU02 as well as the five E1800089
mirrors came back to the 40m. Instead, the
two ETM spares (ETMU06 / ETMU08) were delivered |
|
|
15625
|
Wed Oct 14 13:28:04 2020 |
Koji | Update | COC | ITM/ETM spares in Downs | The two ITM spares and two ETM spares are
together stored in the optic storage (B110)
at Downs. c/o Liyuan and GariLynn |
|
|
13
|
Thu Oct 25 00:01:21 2007 |
rana | Software Installation | CDS | GEO DV => LIGO DV | [URL=http://www.aei.mpg.de/~hewitson/]Martin
Hewitson[/URL] of [B]GEO600[/B] fame has
modified the cool GEO DV
|
|
|
28
|
Mon Oct 29 23:25:42 2007 |
tobin | Software Installation | CDS | frames mounted | I mounted the frames directory on mafalda
and linux3. It's intentionally not listed
in the /etc/fstab so that an fb crash won't |
|
|
144
|
Fri Nov 30 11:22:22 2007 |
ajw | Summary | CDS | GEO DV => LIGO DV | [quote][URL=http://www.aei.mpg.de/~hewitson/]Martin
Hewitson[/URL] of [B]GEO600[/B] fame has
modified the cool GEO DV
|
|
|
170
|
Wed Dec 5 19:25:07 2007 |
rana | DAQ | CDS | DMF | I made a database file on C1AUX called dmf.db.
It has 9 DMF EPICS channels which are also
trended
|
|
|
270
|
Fri Jan 25 21:36:40 2008 |
rana | Update | CDS | mDV / channel issues | [COLOR=orange]Fri Jan 25 21:30:00 2008[/COLOR]
|
|
|
278
|
Sun Jan 27 21:44:48 2008 |
rana | Update | CDS | Seismic BLRMS on Matlab | I wrote a matlab script to produce band limited
RMS trends from our accelerometers. It mimics
the code written
|
|
|
356
|
Tue Mar 4 19:14:09 2008 |
rana | Configuration | CDS | TDS & SVN | [COLOR=purple][I]Matt, Rob, Rana[/I][/COLOR]
[B][COLOR=chocolate]Today we added the TDS |
|
|
383
|
Sun Mar 16 17:03:32 2008 |
rob | Configuration | CDS | ASS code change |
I've updated the ass.mdl file in the directory:
|
|
|
394
|
Sat Mar 22 22:39:02 2008 |
mevans | Summary | CDS | Direct Form 2 filters are bad | Here I show a comparison between the filter
algorithm currently used in LIGO (Direct
Form II), and an alternative algorithm designed |
|
|
459
|
Tue Apr 29 21:09:12 2008 |
rana | DAQ | CDS | FE Filters | These are new FE filters for downsampling
and upsampling. We will be going from native
hardware sampling rates of 64k down to 32k, |
|
|
1782
|
Thu Jul 23 07:34:45 2009 |
Aidan | Update | CDS | Added C2 MEDM screens to 40m SVN. |
See Adhikari eLOG entry: http://nodus.ligo.caltech.edu:8080/AdhikariLab/194 |
|
|
1801
|
Tue Jul 28 18:32:21 2009 |
Koji | Update | CDS | RCG work | Peter and Koji,
We are constructing a setup for the |
|
|
2045
|
Fri Oct 2 18:04:45 2009 |
rob | Update | CDS | DTT no good for OMC channels | I took the output of the OMC DAC and plugged
it directly into an OMC ADC channel to see
if I could isolate the OMC DAC weirdness |
|
|
2173
|
Tue Nov 3 12:47:01 2009 |
Koji | Configuration | CDS | 1Y9 Rack configuration update | For the CDS upgrade preparation I put
and moved those stuff at the rack 1Y9:
Placed 1Y9-12 ADC to DB44/37 Adapter |
|
|
2181
|
Thu Nov 5 16:24:59 2009 |
Koji | Update | CDS | ETMY CDS test stuff | Joe, Peter, Jay, Koji, Rana
We put the new CDS stuff at Y end
1Y9 rack. |
|
|
2233
|
Wed Nov 11 01:33:52 2009 |
pete | Update | CDS | RCG ETMY code update | I've added the side coil to the model
controller and plant, and the oplev quad
to the model controller and plant. After |
|
|
2243
|
Wed Nov 11 20:46:07 2009 |
pete | Update | CDS | RCG ETMY phase I update | The .mdl code for the mdc and
mdp |
|
|
2259
|
Thu Nov 12 17:24:29 2009 |
Koji, Joe, Peter | Configuration | CDS | ETMY CDS test started | We started the test of the new CDS system
at ETMY.
The plan is as follows: |
|
|
2471
|
Sun Jan 3 08:23:39 2010 |
rana | Configuration | CDS | autoburt.pl 'fixed' for post 2009 years | Tobin & Keith pointed out in the
LLO
ilog that there was a code bug |
|