| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17616
|
Fri Jun 2 19:03:57 2023 |
Paco | Update | CDS | C1SUS DAC failure (Re: ITMX UL coil and BS oplev rms) | Vertex
SUS DAC-0 card is kaput |
|
|
17620
|
Mon Jun 5 15:34:27 2023 |
Paco | Update | CDS | C1SUS DAC-0 replacement | Vertex
c1sus DAC-0 card replaced |
6x |
|
17626
|
Thu Jun 8 10:31:46 2023 |
yuta | Update | CDS | c1sus2 all FE models crashed spontaneously again and IMC/vertex optics damping stopped | [Mayank, Yuta]
We noticed that |
|
|
17657
|
Mon Jun 26 10:21:44 2023 |
Koji | Update | CDS | Deleted harmful script link on the IFO ALIGN screen | There were a few scripts linked on the
IFO ALIGN screen. These silently ran ASS
and leave (possible) offsets in ASS. When |
|
|
17710
|
Mon Jul 24 19:56:41 2023 |
Yehonathan | Update | CDS | rossa can't boot | {Koji, Yehonathan}
I had some issues with the Debian
GUI which I thought would be solved upon |
|
|
17711
|
Mon Jul 24 23:01:10 2023 |
Koji | Summary | CDS | FIXED: rossa can't boot | Compared the network settings between some
of the machines.
It seemed that we can write network |
|
|
17727
|
Thu Jul 27 17:03:57 2023 |
Koji | Summary | CDS | c1psl spare channel situation | I looked at the Acromag situation
of c1psl to prepare for the PSL air flow
speed sensor. |
|
|
17751
|
Thu Aug 3 17:27:07 2023 |
Koji | Update | CDS | Slow machine target folder clean up | I went to /cvs/cds/caltech/target and found
some folders for apparently old targets.
c0daqawg |
|
|
17754
|
Fri Aug 4 20:50:13 2023 |
Koji | Summary | CDS | The location where the wiper script is running | The raw frame file is stored in /frames
at fb. Before the disk space is flooded,
the wiper script deletes the old raw frame |
|
|
17775
|
Thu Aug 10 20:19:40 2023 |
Hiroki | HowTo | CDS | Fixing error of "Unable to obtain measurement data" | [JC, Koji, Yuta, Hiroki]
When we tried to measure the spectrum
of C1:LSC-DARM_IN2 with the diaggui, |
|
|
17806
|
Wed Aug 23 19:47:53 2023 |
Koji | Update | CDS | Dolphin Fencing Investigation / Full CDS crash / nodus reboot / recovered all | Dolphin
Investigation
- I made a basic description on |
|
|
17834
|
Fri Sep 8 17:11:53 2023 |
Koji | Update | CDS | FSSSlow restoration | I came to the lab to see the recovery work
from the power glitch this morning 8:15AM.
All CDS seems up. The suspensions are somewhat |
|
|
17846
|
Fri Sep 15 18:50:34 2023 |
Koji | Update | CDS | Dolphin Fencing Investigation / Full CDS crash / nodus reboot / recovered all | Dolphin
Fencing technique
I believe that the dolphin emits |
|
|
470
|
Thu May 8 02:06:13 2008 |
rana | Summary | COC | Thermal Lensing in the ITMs and BS may be a problem | The iLIGO interferometers start to see thermal
lensing effects with ~2W into the MC, a recycling
gain of ~50, and a beam waist on the ITMs |
|
|
885
|
Tue Aug 26 09:58:59 2008 |
steve | Omnistructure | COC | ETMX is #03 | This is the picture of ETMX from the upper
south west viewport |
|
|
1649
|
Wed Jun 3 18:55:27 2009 |
rana | Update | COC | snapshot of upgrade layout | |
|
|
2094
|
Thu Oct 15 01:21:31 2009 |
rana | Summary | COC | Thermal Lensing in the ITM | Thermal lensing formula:
|
|
|
2096
|
Thu Oct 15 02:41:04 2009 |
rana | Update | COC | Choice of folding mirrors in the RC cavities | In addition to the main mirrors (PRM, SRM)
we will also have fold mirrors (called PR1,
PR2, SR1, SR2). I am curious to see if we |
|
|
2157
|
Wed Oct 28 17:20:21 2009 |
rana | Summary | COC | ETM HR reflectivity plot | This is a plot of the R and T of the existing
ETM's HR coating. I have only used 1/4 wave
layers (in addition to the standard 1/2 wave |
|
|
2361
|
Mon Dec 7 18:18:55 2009 |
Jenne | Update | COC | ETMX drag wiped | [Koji, Jenne, Alberto, Steve, Bob]
ETMX has |
|
|
2366
|
Tue Dec 8 13:03:26 2009 |
Koji | Update | COC | ETMY drag wiped | Jenne, Kiwamu, Alberto, Steve, |
|
|
2367
|
Tue Dec 8 16:27:13 2009 |
Jenne | Update | COC | ITMX wiped | Jenne, Kiwamu, Koji, Alberto, Steve, Bob
ITMX |
|
|
2373
|
Wed Dec 9 18:01:06 2009 |
Koji | Update | COC | Wiping finished | [Kiwamu, Jenne, Alberto, Steve, Bob,
Koji]
We |
|
|
2424
|
Wed Dec 16 20:29:08 2009 |
rana | Update | COC | ETM Coating study | This plot shows the Transmission for 532
and 1064 nm as a function of the thickness
of the SiO2 layer. |
|
|
2588
|
Wed Feb 10 23:44:56 2010 |
Koji | Summary | COC | Phase Map Analysis | In the middle of the last month, Kiwamu
and I went to Garilynn's lab to measure the
phase maps of the new ITMs and SRMs. |
|
|
2611
|
Wed Feb 17 19:36:05 2010 |
Koji | Update | COC | Arm visibility | I
have measured the arm visibilities.
I did not see any change since the |
|
|
2614
|
Fri Feb 19 00:31:17 2010 |
Jenne | Update | COC | New ITMX guiderods glued | [Jenne, Kiwamu, with moral support from
Koji, and loads of advice from Steve and
Bob] |
|
|
2618
|
Fri Feb 19 15:29:14 2010 |
kiwamu | Update | COC | Gluing dumbbells and magnets | Jenne and kiwamu
We have |
|
|
2623
|
Mon Feb 22 10:25:37 2010 |
Jenne | Update | COC | ITMY standoff and guiderod epoxied | This work happened on Friday, after Nodus
and the elog went down....
[Jenne, Kiwamu] |
|
|
2629
|
Mon Feb 22 21:07:26 2010 |
Jenne | Update | COC | Magnets glued to ITMX | [Kiwamu, Jenne]
The magnets + dumbbell standoffs
have been glued to ITMX. We're waiting |
|
|
2642
|
Fri Feb 26 01:00:07 2010 |
Jenne | Update | COC | Suspension Progress | This is going to be a laundry list of the
mile markers achieved so far:
* Guiderod and wire standoff glued |
|
|
2654
|
Thu Mar 4 02:25:14 2010 |
Jenne | Update | COC | Further details on the magnet story, and SRM guiderod glued | [Koji, Jenne]
First, the easy story: |
|
|
2820
|
Tue Apr 20 18:02:22 2010 |
Jenne | Update | COC | New SRM and PRM Hung | [Jenne, Steve]
We removed the old SRM and PRM from
their cages, and are temporarily storing |
|
|
3051
|
Sun Jun 6 04:48:41 2010 |
rana | Update | COC | ITM01 HR Phase Map | While trying to set up the SIS-FFT to use
our new ITM phase maps, I noticed that the
surface of our ITMs looks pretty good actually |
|
|
3091
|
Sun Jun 20 16:07:23 2010 |
Koji | Summary | COC | Calibration of the metrology lab interferometer | Kiwamu and Koji
Summary
We have visited GariLynn's |
|
|
3684
|
Sun Oct 10 16:59:20 2010 |
Koji | Omnistructure | COC | PRM phase map measurement at Downs SB 014 | [Kiwamu, Yuta, Koji]
We went to the new metrology lab
at Downs subbasement (Rm014) in order to |
|
|
3685
|
Sun Oct 10 18:09:02 2010 |
Koji | Summary | COC | Phase map interferometer calibration for the data on Oct 8th, 2010 | Summary:
Calibration
of the phase map interferometer was calculated
for the data on Oct 8th, 2010. |
|
|
3738
|
Mon Oct 18 18:33:46 2010 |
Koji | Summary | COC | Summary of the main mirrors & their phasemap measurement | I have made a summary web page for the
40m upgrade optics.
https://nodus.ligo.caltech.edu:30889/40m_phasemap/ |
|
|
7385
|
Fri Sep 14 01:18:51 2012 |
rana | Update | COC | 2 Layout Changes | After looking
at the in-vacuum layout I think we should |
|
|
7398
|
Mon Sep 17 18:04:01 2012 |
Steve | Update | COC | 2 Layout Changes |
|
|
|
7517
|
Wed Oct 10 08:36:47 2012 |
Steve | Update | COC | special mirror mounts holder |
|
|
|
8211
|
Sat Mar 2 00:23:19 2013 |
rana | Summary | COC | Phase Maps measured of the ATF flat mirrors | I took the two 'flat' 2" mirrors over
to Downs and Garilynn showed me how to measure
them with the old Wyko machine. |
|
|
10414
|
Wed Aug 20 15:31:27 2014 |
ericq | Update | COC | Arm Loss Investigations Continue | [ericq, Gabriele]
Summary: After today's meeting, Gabriele
and I looked into the arm loss situation, |
|
|
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 |
|