| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2408
|
Mon Dec 14 00:37:28 2009 |
Koji | Omnistructure | Environment | Ants in the coffee maker | I made a short stop at the 40m on Sunday
night and found that hundreds ants are in |
|
|
2409
|
Mon Dec 14 11:21:23 2009 |
steve | Omnistructure | Environment | Ants in the coffee maker |
We still had some ants visiting
the sink area this morning. These ants seem |
|
|
11441
|
Thu Jul 23 20:57:15 2015 |
Jessica | Summary | General | Applying Pre-filter to data before IIR Wiener Filtering | I updated my bandpass filter and have |
|
|
520
|
Thu Jun 5 10:46:26 2008 |
josephb | Configuration | Cameras | Approximately uniform reflected white light | In an attempt to investigate the structures
seen in previous images for the GC750, I
aimed it at a relatively clean section of |
|
|
3619
|
Wed Sep 29 11:18:36 2010 |
josephb | Update | CDS | Apps code changes | After asking Alex specifically what he
did yesterday after I left, he indicated
he copied a bunch of stuff from Hanford, |
|
|
1586
|
Thu May 14 15:28:28 2009 |
steve | Summary | SUS | April 24 earthquake effect on MC2 | [quote][quote]The MC side problem could also
be the side tramp unit problem. Set the tramp
to 0 and see if that helps.[/quote]
|
|
|
6550
|
Thu Apr 19 16:21:04 2012 |
Zach | Update | Computer Scripts / Programs | Arbcav updated, made badass | I have modified Arbcav to be way cooler |
6x |
|
8204
|
Fri Mar 1 02:49:34 2013 |
Jenne | Update | ASS | Arm A2L measurement | I haven't finished debugging the scripts
so that the measurement is fully automatic,
like the MC, but I did measure the arm spot |
|
|
8229
|
Tue Mar 5 01:43:04 2013 |
Jenne | Update | ASS | Arm A2L measurement script finished | In either .../scripts/XARM or ...../scripts/YARM
run either A2L_XARM or A2L_YARM.
The wrapper script will, like the |
|
|
8467
|
Fri Apr 19 16:58:59 2013 |
Jenne | Update | ASC | Arm A2L measurement scripts 90% working again | After Den's work with the ASS model this
week, all of the channel names were changed
(this wasn't pointed out in his elog....grrr), |
|
|
10975
|
Wed Feb 4 19:21:37 2015 |
Koji | Update | ASC | Arm ASS servos now have triggered gain with arm lock status | We had persistent frustration by occasional
unlock during ASSing.
Today, I added triggers to the servo |
|
|
2174
|
Wed Nov 4 16:49:32 2009 |
Alberto | Update | LSC | Arm Cavity Finesse Measurement | I'm going to work on the X arm to measure
the arm cavity finesse.
The idea is to measure the cavity |
|
|
2175
|
Wed Nov 4 18:35:19 2009 |
Alberto | Update | LSC | Arm Cavity Finesse Measurement |
|
|
|
2176
|
Wed Nov 4 21:46:18 2009 |
Alberto | Update | LSC | Arm Cavity Finesse Measurement |
|
|
|
469
|
Thu May 8 01:50:25 2008 |
rana | Summary | ASC | Arm Cavity HOM Resonances | Nothing new, but I calculated the frequencies
of the first 22 higher order transverse modes
and thought I might as well list them here.
|
|
|
555
|
Mon Jun 23 21:51:19 2008 |
Alberto | Update | General | Arm Cavity Length Measurement | We measured the arm cavity lengths sweeping
the ETM mirror position and looking at the
reflected demodulated output. We excited |
|
|
2415
|
Mon Dec 14 19:33:04 2009 |
Alberto | Update | General | Arm Cavity Poles measured again after cleaning the optics last week | Last week we vented and we cleaned the
main optics of the arm cavities.
I measured the frequency of the cavity |
|
|
2418
|
Tue Dec 15 05:29:31 2009 |
Alberto | Update | General | Arm Cavity Poles measured again after cleaning the optics last week |
The Y arm cavity pole moved
down by 130 Hz, whereas the X arm moved by |
|
|
8741
|
Tue Jun 25 00:28:52 2013 |
rana, manasa | Update | LSC | Arm Cavity scan with X-ALS after ALS servo upgrade | [Rana, Manasa]
ALS noise suppressed to |
6x |
|
8742
|
Tue Jun 25 10:18:34 2013 |
Mystery Man | Update | LSC | Arm Cavity scan with X-ALS after ALS servo upgrade |
|
|
|
8744
|
Tue Jun 25 11:39:13 2013 |
Koji | Update | LSC | Arm Cavity scan with X-ALS after ALS servo upgrade | My understanding is that that number is
an in-loop evaluation of the loop so far
(as the first step of the loop evaluation). |
|
|
1577
|
Tue May 12 15:22:09 2009 |
Yoichi | Update | LSC | Arm Finesse | [quote]
It looks as if the measured DARM response
is skewed by an extra low pass filter at |
|
|
11430
|
Mon Jul 20 11:57:17 2015 |
ericq | Update | General | Arm Locking recovered | The interferometer is warming up!
I had some issues locking the IMC
at first. It turned out that the MC3 side |
|
|
1456
|
Mon Apr 6 21:50:43 2009 |
rana | Update | LSC | Arm Locking via pushing MC2 | Inspired by our 'No Refcav' scheme here, I
was inspired to re-explore the idea of locking
the
|
|
|
2247
|
Thu Nov 12 02:02:18 2009 |
rana | Summary | LSC | Arm Locking with no feedback to the ETM or ITM | Steps:
1) Turn off feedback to ETMY (the
ETMY button on the LSC screen). |
|
|
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, |
|
|
5626
|
Thu Oct 6 15:40:57 2011 |
Jenne | Update | LSC | Arm absl length data taken | [Katrin, Jenne]
We took the data for the new absolute
length measurement of both arms, after the |
|
|
5653
|
Tue Oct 11 21:23:51 2011 |
Jenne | Update | LSC | Arm absl lengths |
|
|
|
728
|
Wed Jul 23 22:34:07 2008 |
Yoichi | Update | LSC | Arm cavity g-factor measurement | I tried the same thing as the X-arm to the
Y-arm.
I'm puzzled. I found exactly the same behavior |
|
|
730
|
Thu Jul 24 01:27:00 2008 |
Koji | Update | LSC | Arm cavity g-factor measurement | [quote]I locked the Y-arm and mis-aligned
the end mirror in Yaw until the transmission
power gets half.
|
|
|
731
|
Thu Jul 24 02:57:26 2008 |
rob | Update | LSC | Arm cavity g-factor measurement | [quote]
So, now I feel that the method for the TEM01
quest should be reconsidered.
|
|
|
733
|
Thu Jul 24 08:09:26 2008 |
Yoichi | Update | LSC | Arm cavity g-factor measurement | [quote]
A-ha! Do you always expect the 30Hz signal,
don't you?
|
|
|
2996
|
Wed May 26 22:22:03 2010 |
Alberto | Configuration | 40m Upgrading | Arm cavity length | The second sideband is resonant in the
arms for a cavity length of 37.9299m.
The nearest antiresonant arm lengths |
|
|
2070
|
Thu Oct 8 20:18:56 2009 |
Koji | Summary | General | Arm cavity loss | Last night (Oct 07), I ran armLoss script
in order to obtain the latest numbers for
the arm cavity loss. |
|
|
2416
|
Mon Dec 14 22:32:56 2009 |
Koji | Update | General | Arm cavity loss ~ result | I like to ask someone to review the calculation
on the wiki. |
|
|
8844
|
Sun Jul 14 18:19:00 2013 |
Annalisa | Update | Green Locking | Arm cavity scan | Yesterday evening Nic and me were in the
lab. The Mode Cleaner was unlocked, but after
many attempt we could fix it and we did many |
|
|
15860
|
Wed Mar 3 23:23:58 2021 |
gautam | Update | ALS | Arm cavity scan | I see no evidence of anything radically
different from my PSL table optical
characterization in the IMC transmitted |
|
|
14944
|
Sun Oct 6 15:23:27 2019 |
gautam | Update | ALS | Arm control using error signals achieved | Summary:
I |
|
|
5079
|
Mon Aug 1 04:08:24 2011 |
kiwamu | Update | ABSL | Arm length measurement : cavity kick technique | I made some
attempts to measure the current length of |
|
|
5095
|
Tue Aug 2 16:55:21 2011 |
rana | Update | ABSL | Arm length measurement : cavity kick technique |
|
|
|
11098
|
Wed Mar 4 19:03:19 2015 |
ericq | Update | LSC | Arm length remeasurement | As discussed at today's meeting, we
would like to (re)measure the Arm cavity
lengths to ~mm precision, and their g-factors. |
|
|
11107
|
Fri Mar 6 02:10:35 2015 |
rana | Update | LSC | Arm length remeasurement | This has been done before:
http://nodus.ligo.caltech.edu:8080/40m/6938
Arm length measurements and g-factor |
|
|
3001
|
Thu May 27 12:52:02 2010 |
Alberto | Update | 40m Upgrading | Arm lengths |
For both sidebands to be antiresonant
in the arms, the first modulation frequency |
|
|
11524
|
Sat Aug 22 15:48:32 2015 |
Koji | Summary | LSC | Arm locking recovery | As per Ignacio's request, I restored
the arm locking.
- MC WFS relief |
|
|
1576
|
Tue May 12 01:22:51 2009 |
Yoichi | Update | LSC | Arm loss | Using the armLoss script (/cvs/cds/caltech/scripts/LSC/armLoss),
I measured the round trip loss (RTL) of the
arms.
|
|
|
12533
|
Wed Oct 5 19:10:04 2016 |
gautam | Update | General | Arm loss measurement review | [ericq,gautam]
There are multiple methods by which
the arm loss can be measured, including, |
|
|
10248
|
Mon Jul 21 17:32:43 2014 |
ericq | Summary | LSC | Arm losses |
|
|
|
15264
|
Tue Mar 10 19:59:09 2020 |
Yehonathan | Update | Loss Measurement | Arm transfer function measurement | I want to measure the transfer function
of the arm cavities to extract the pole frequencies
and get more insight into what is going |
|
|
15269
|
Thu Mar 12 10:43:50 2020 |
rana | Update | Loss Measurement | Arm transfer function measurement |
|
|
|
15277
|
Mon Mar 16 15:23:03 2020 |
Yehonathan | Update | Loss Measurement | Arm transfer function measurement | I measured the cross-calibration of the
two PDs on the PSL table.
I used the existing flip mounted |
|