| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
10637
|
Fri Oct 24 02:14:05 2014 |
Jenne | Update | LSC | Increased DARM gain even more | [Jenne, Diego]
We spent the afternoon working on
the new scan for IR resonance script. |
|
|
2000
|
Thu Sep 24 21:04:15 2009 |
Jenne | Update | MOPA | Increasing the power from the MOPA | [Jenne, Rana, Koji]
Since |
|
|
2007
|
Sun Sep 27 12:52:56 2009 |
rana | Update | MOPA | Increasing the power from the MOPA | This is a trend of the last 20 days. After
our work with the NPRO, we have recovered
only 5% in PMC trans power, although there's |
|
|
14463
|
Sun Feb 17 17:35:04 2019 |
gautam | Summary | Loss Measurement | Inferred X arm loss | Summary:
To complete the story before moving
on to ALS, I decided to measure the X arm |
|
|
14454
|
Thu Feb 14 21:29:24 2019 |
gautam | Summary | Loss Measurement | Inferred Y arm loss | Summary:
From the measurements I have, the
Y arm loss is estimated to be 58 |
|
|
15163
|
Tue Jan 28 14:33:24 2020 |
gautam | Update | PSL | Inferred free-running frequency noise | To conclude my PMC noise investigations:
Attachment |
|
|
16323
|
Mon Sep 13 17:05:04 2021 |
Tega | Summary | PEM | Infrasensing temperature sensor modbus configuration | Anchal mentioned it would be good to put
more details about how I arrived at the values
needed to configure the modbus drive for |
|
|
16761
|
Thu Apr 7 11:47:22 2022 |
Yehonathan | Update | BHD | Initial BHD modeling: AS - LO mode matching |
I begin modeling the initial BHD |
|
|
16766
|
Thu Apr 7 21:15:04 2022 |
Yehonathan | Update | BHD | Initial BHD modeling: AS - LO mode matching | Ok, it turns out these optics were purchased
on purpose, as this elog
shows. Jon considered building a mode-matching |
|
|
16858
|
Mon May 16 16:13:01 2022 |
Yehonathan | Update | BHD | Initial BHD modeling: Damped suspension model | I was finally able to set up a stable suspension
model with the help of Yuta and I'm now
ready to start doing some MICH noise |
|
|
3284
|
Sat Jul 24 13:13:41 2010 |
rana, steve, alberto | Update | General | Initial Crane Inspection reveals flaws: wiring and oil | The guy from KroneCrane (sp?) came today
and started the crane inspection on the X
End Crane. There were issues with our crane |
|
|
3290
|
Mon Jul 26 10:04:24 2010 |
steve | Update | General | Initial Crane Inspection reveals flaws: wiring, oil and imbalance |
|
|
|
360
|
Wed Mar 5 12:51:48 2008 |
John | Summary | LSC | Initial Ligo Arm finesse versus lambda | I've taken the coating recipes for the initial
ligo arm cavity from Rana's web page (ligo.caltech/edu/~rana/mat/)
and plotted the finesse as a function of |
|
|
7599
|
Tue Oct 23 17:30:33 2012 |
jamie, nic, jenne, raji, manasa | Update | Alignment | Initial attempts to fix IFO alignment | We went into the vertex today to see about
fixing the alignment. The in-air access
connector is in place, and we took heavy |
|
|
12080
|
Fri Apr 15 23:11:49 2016 |
gautam | Update | General | Innolight 1W moved to SP table | I
have moved the 1W Innolight + controller
from the PSL table to the SP table for beam |
|
|
2810
|
Mon Apr 19 16:31:42 2010 |
Kevin | Update | PSL | Innolight 2W Laser | Koji and Kevin
We unpacked the Innolight 2W laser,
took an inventory, and scanned the operations |
|
|
2822
|
Tue Apr 20 20:15:37 2010 |
Kevin | Update | PSL | Innolight 2W Output Power vs Injection Current | Koji and Kevin measured the output power
vs injection current for the Innolight 2W
laser. |
|
|
2828
|
Wed Apr 21 21:56:27 2010 |
Kevin | Update | PSL | Innolight 2W Vertical Beam Profile | Koji and Kevin measured the vertical beam
profile of the Innolight 2W laser at one
point. |
|
|
2829
|
Wed Apr 21 22:11:48 2010 |
rana | Update | PSL | Innolight 2W Vertical Beam Profile | Back in Gainesville in 1997, I learned
how to do this using the chopper wheel. |
|
|
2830
|
Wed Apr 21 23:35:37 2010 |
Koji | Update | PSL | Innolight 2W Vertical Beam Profile | Good fit. I assumed sqrt(x) is a typo of
sqrt(2).
|
|
|
2834
|
Thu Apr 22 21:42:24 2010 |
Alberto | Update | PSL | Innolight 2W Vertical Beam Profile |
What kind of fit did you use?
How are the uncertainties in the parameters |
|
|
14556
|
Fri Apr 19 14:06:36 2019 |
gautam | Update | PSL | Innolight NPRO shutoff | When I got back from lunch just now, I
noticed that the PMC TRANS and REFL cameras
were showing no spots. I |
|
|
14560
|
Fri Apr 19 20:21:52 2019 |
gautam | Update | PSL | Innolight NPRO shutoff | Happened again at ~730pm.
The NPRO diag channels don't
really tell me what happened in a causal |
|
|
14566
|
Wed Apr 24 16:06:44 2019 |
gautam | Update | PSL | Innolight NPRO shutoff | After discussing with Koji, I turned the
NPRO back on again, at ~4PM local time. I
first dialled the injection current down |
|
|
14577
|
Thu Apr 25 17:31:56 2019 |
gautam | Update | PSL | Innolight NPRO shutoff | NPRO shutoff at ~1517 local time
today afternoon. Again, not many clues from
the NPRO diagnostics channel, but to my eye, |
|
|
12109
|
Thu May 5 21:28:44 2016 |
gautam | Update | endtable upgrade | Innolight PZT capacitance | I suggested
in an earlier elog that after the repair |
|
|
11961
|
Fri Jan 29 14:43:47 2016 |
Steve | Update | Green Locking | Innolight laser is 10 years old |
|
|
|
11962
|
Fri Jan 29 16:55:27 2016 |
rana | Update | Green Locking | Innolight laser is 10 years old | I don't think there's any evidence
that the noise eater is bad. That would change
the behavior of the relaxation oscillation |
|
|
11963
|
Sat Jan 30 00:12:22 2016 |
gautam | Update | Green Locking | Innolight laser is 10 years old |
|
|
|
11964
|
Sat Jan 30 09:56:24 2016 |
Koji | Update | Green Locking | Innolight laser is 10 years old | It is strange that there is no difference
between with and without NE, isn't it? |
|
|
11967
|
Mon Feb 1 15:16:28 2016 |
gautam | Update | Green Locking | Innolight laser is 10 years old | The Innolight laser control unit has a
25 pin D-sub connector on the rear which
is meant to serve as a diagnostics aid, and |
|
|
11968
|
Mon Feb 1 15:43:18 2016 |
Koji | Update | Green Locking | Innolight laser is 10 years old | This is the same one as what you got from
Steve. But you can find full pages.
https://wiki-40m.ligo.caltech.edu/PSL/NPRO |
|
|
11987
|
Fri Feb 12 11:10:49 2016 |
Steve | Update | Green Locking | Innolight laser is 10 years old | It shipped out for repair evaluation.
Arrived to Hayward,CA 2016Feb16
|
|
|
4705
|
Thu May 12 22:54:20 2011 |
rana | Update | DAQ | Input Beam Naming change (no more IP) | We decided to rename the Input Beam
channels (while keeping temporary backwards
compatible aliases) as: |
|
|
2584
|
Tue Feb 9 17:51:48 2010 |
Jenne | Summary | IOO | Input Mode Matching Telescope design is complete | The upgrade's input mode matching telescope
design is complete. A summary document
is on the MMT |
|
|
7012
|
Mon Jul 23 20:19:01 2012 |
Liz | Update | Computer Scripts / Programs | Input Needed (From everyone!) | The summary pages
are now online |
|
|
11896
|
Tue Dec 22 16:23:33 2015 |
gautam | Update | IOO | Input alignment to PMC tweaked | When I came in this afternoon, I saw that
the PZT voltage to the PMC had railed. Following
the usual procedure of turning the servo |
|
|
7699
|
Tue Nov 13 00:15:08 2012 |
Jenne | Update | IOO | Input and Output PZTs turned on | I turned on the power supplies for the
output PZTs and pitch and yaw for PZT2.
This is back to the condition that we had |
|
|
8262
|
Fri Mar 8 20:51:00 2013 |
Manasa | Update | Alignment | Input beam drift - investigation **IMPORTANT** | Checking the drift in input pointing
(TT2 is the main suspect)
|
|
|
8267
|
Mon Mar 11 12:29:25 2013 |
Manasa | Update | Alignment | Input beam drift - weekend trend | I centered ipang and ippos on the QPDs
(using only the steering mirrors) and wanted
to see the drift over the weekend. |
|
|
8252
|
Thu Mar 7 18:12:03 2013 |
yuta | Update | Alignment | Input beam drift ~ 0.1 mrad/h in pitch | [Jenne, Manasa, Yuta]
We temporarily centered the beam on |
|
|
13827
|
Wed May 9 17:30:04 2018 |
gautam | Update | General | Input beam misaligned | There is
no beam going into the IFO at the moment. |
|
|
13828
|
Wed May 9 19:51:07 2018 |
gautam | Update | General | Input beam misaligned | As
suspected - the problem was with the TTs. |
|
|
7210
|
Thu Aug 16 20:18:39 2012 |
Yaakov | Update | STACIS | Input for feedforward/feedback in the STACIS | Below is the bottom view of the geophone
preamplifier and controller for the STACIS.
It slides into the upper part of the STACIS, |
6x |
|
5438
|
Fri Sep 16 17:16:15 2011 |
Jenne | Update | SUS | Input matrix diagonalization: Fail! | [Jenne, Anamaria]
I put the new matricies in from the
free swinging test for the: ITMX, ITMY, ETMX, |
|
|
4653
|
Fri May 6 15:42:55 2011 |
valera | Metaphysics | IOO | Input mode cleaner length and 11 MHz modulation frequency | After Kiwamu set the REFL11 phases
in the PRMI configuration (maximized PRM->REFL11I
reesponse) I tried to measure the MC length |
|
|
15567
|
Thu Sep 10 15:43:22 2020 |
Jon | Update | BHD | Input noise spectra for A+ BHD modeling | As promised some time ago, I've
obtained input noise spectra from the sites calibrated
to physical units. They are located in a |
|
|
15181
|
Fri Jan 31 16:04:30 2020 |
gautam | Update | IOO | Input pointing drift | One factor which hampers locking efforts
is the apparent drift of the input beam into
the IFO. Over timescales of ~1 hour, I have |
|
|
15841
|
Wed Feb 24 12:29:18 2021 |
gautam | Update | General | Input pointing recovered | While working at the LSC rack, I lost the
input pointing into the IFO (the TT wiring
situation is apparently very fragile, and |
|
|
3114
|
Thu Jun 24 11:16:32 2010 |
Sharmila, Rana and Kiwamu | HowTo | VAC | Inspection of the BS (sorry, no sounds) | |
|