| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
59
|
Sat Nov 3 16:20:43 2007 |
waldman | Summary | OMC | A good day's work |
I followed up yesterday's test of the PZT
with a whole mess of characterizations of |
6x |
|
4376
|
Fri Mar 4 03:31:35 2011 |
kiwamu | Update | Green Locking | A first noise budget | I made a noise budget for the ALS noise
measurement that I did a week ago (see
#4352). |
|
|
15562
|
Mon Sep 7 23:49:14 2020 |
gautam | Update | BHD | A first look at RF44 scheme | Summary:
Over the last couple of days, I've
been working towards getting the infrastructure |
|
|
15563
|
Tue Sep 8 01:31:43 2020 |
Koji | Update | BHD | A first look at RF44 scheme | - Loose fiber coupler: Sorry about that.
I could not detect something was loose there,
although some of the locks were not tightened. |
|
|
6414
|
Wed Mar 14 13:16:50 2012 |
kiwamu | Update | LSC | A correction on Noise estimatino in the REFL33Q | A
correction on the previous elog about the
REFL33Q noise: |
|
|
1286
|
Mon Feb 9 17:09:51 2009 |
Yoichi | Update | Computers | A bunch of updates for the network GPIB stuff. | During the work on ISS, we noticed that netgpibdata.py
is very unreliable for SR785.
The problem was caused by flakiness of the |
|
|
15820
|
Thu Feb 18 20:24:48 2021 |
Koji | Summary | Electronics | A bunch of electronics received | Todd provided us a bunch of electronics.
I went to Downs to pick them up this afternoon
and checked the contents in the box. Basically, |
|
|
15828
|
Sat Feb 20 10:01:48 2021 |
gautam | Summary | Electronics | A bunch of electronics received | Will we also be receiving the additional
34 Satellite Amplifier PCBs? |
|
|
15830
|
Sat Feb 20 16:46:17 2021 |
Koji | Summary | Electronics | A bunch of electronics received | We received currently available sets. We
are supposed to receive more coil drivers
and sat amps, etc. But they are not ready |
|
|
15866
|
Fri Mar 5 00:53:09 2021 |
Koji | Summary | Electronics | A bunch of electronics received | Received additional front/rear panels.
Updated the original entry and Wiki [Link]
|
|
|
15868
|
Fri Mar 5 15:03:28 2021 |
gautam | Summary | Electronics | A bunch of electronics received | The PCBs for the D1002593
BIO I/F (5pcs ea of D1001050
and D1001266) |
|
|
15870
|
Fri Mar 5 15:32:53 2021 |
Koji | Summary | Electronics | A bunch of electronics received | The parts will be ordered by Koji
The components for the additional BIO I/F
have been ordered. |
|
|
15981
|
Wed Mar 31 03:56:37 2021 |
Koji | Summary | Electronics | A bunch of electronics received | We have received 9x 18bit DAC adapter boards
(D1000654) |
|
|
10038
|
Fri Jun 13 19:09:44 2014 |
Koji | Update | IOO | A blown fuse found on the euro card crate at 1X2 (IOO) rack. | [Rana Zach Koji]
We tracked down the MC locking issue
to be associated with the power supply problem. |
|
|
4486
|
Mon Apr 4 18:58:44 2011 |
Bryan | Configuration | Green Locking | A beam of purest green | We now have green light at the Y end.
The set-up (with careful instructions |
|
|
3942
|
Wed Nov 17 23:45:20 2010 |
Jenne | Update | SUS | A bad day for suspensions | [Jenne, Suresh]
Today has been a downright miserable
day in the world of suspension work. Thumbs |
|
|
2364
|
Tue Dec 8 09:18:07 2009 |
Jenne | Update | Computers | A *great* way to start the day.... | Opening of ETMY has been put on hold to
deal with the computer situation. Currently
all front end computers are down. The |
|
|
7587
|
Mon Oct 22 09:10:07 2012 |
Steve | Update | VAC | @750Torr |
|
|
|
1659
|
Sat Jun 6 01:44:53 2009 |
rob | Update | Locking | ? | Lock acquisition is proceeding smoothly
for the most part, but there is a very consistent
failure point near the end of the cm_step |
|
|
1660
|
Sun Jun 7 04:57:39 2009 |
Yoichi | Update | Locking | ? |
|
|
|
1663
|
Tue Jun 9 23:25:24 2009 |
rob | Update | Locking | ? |
|
|
|
11685
|
Tue Oct 13 05:48:39 2015 |
ericq | Update | LSC | :/ | [ericq, Gautam]
Despite our best efforts, the grappa
remains out of reach: the DRFPMI was not |
|
|
4237
|
Wed Feb 2 03:27:20 2011 |
Koji | Summary | Green Locking | 85MHz Freq divider | The freq divider was built and installed
in the beat detection path.
Attachment 1: Circuit diagram |
|
|
3803
|
Thu Oct 28 03:07:53 2010 |
kiwamu | Update | Green Locking | 80MHz VCO for green PLL : a health check | I
did a health check for a 80MHz VCO box. |
|
|
3820
|
Fri Oct 29 06:20:20 2010 |
kiwamu | Update | Green Locking | 80MHz VCO for green PLL : VCO calibration | I calibrated the VCO frequency
as a function of the applied input voltage.
|
|
|
3898
|
Thu Nov 11 17:47:36 2010 |
kiwamu | Update | Green Locking | 80MHz VCO : improve PLL hold-in range and put a boost | In order
to enlarge the hold-in range I modified the |
|
|
3896
|
Thu Nov 11 13:54:05 2010 |
kiwamu | Update | Green Locking | 80MHz VCO : about PLL hold-in range |
The hold-in |
|
|
3879
|
Mon Nov 8 10:48:58 2010 |
kiwamu | Update | Green Locking | 80MHz VCO : PLL open loop looks good | |
|
|
3881
|
Mon Nov 8 16:03:46 2010 |
kiwamu | Update | Green Locking | 80MHz VCO : PLL open loop looks good |
|
|
|
3397
|
Wed Aug 11 11:51:45 2010 |
Gopal | Update | WIKI-40M Update | 8.5.10 - 8.11.10 Weekly Update | Summary of
this Week's Activities: |
|
|
12511
|
Wed Sep 21 09:04:57 2016 |
Steve | Update | General | 8 hours recovery progress | Good 8 hours
|
|
|
5619
|
Tue Oct 4 20:34:20 2011 |
Katrin | Update | Green Locking | 7kHz Peak in servo input YARM | [Kiwamu, Katrin]
As reported earlier an oscillation
around 7kHz is an the PDH error signal. The |
|
|
7077
|
Thu Aug 2 04:58:00 2012 |
Masha | Update | PEM | 70 Meter Long Guralp 1 Cable | The parts Jenne and I ordered arrived today,
so we made a |
|
|
3219
|
Wed Jul 14 13:03:04 2010 |
Gopal | Update | WIKI-40M Update | 7.8.10 - 7.14.10 Weekly Update | Summary of this Week's Activities:
Wed. 7/7: COMSOL Busbar tutorials;
began stack design; began base; Viton rubber |
|
|
3363
|
Wed Aug 4 20:58:22 2010 |
Gopal | Update | WIKI-40M Update | 7.28.10 - 8.4.10 Weekly Update | Summary
of this week's activities: |
|
|
3307
|
Wed Jul 28 12:31:00 2010 |
Gopal | Update | WIKI-40M Update | 7.21.10-7.28.10 Weekly Update | Summary of this week's activities:
7/21: Frequency Domain Analysis of
rectangular bar; discussed with Koji how |
|
|
3255
|
Wed Jul 21 11:57:59 2010 |
Gopal | Update | WIKI-40M Update | 7.14.10-7.21.10 Weekly Update | Summary of this week's activities:
7/14: Analytical calculation of Viton
spring constant; updated Viton values in |
|
|
5657
|
Wed Oct 12 18:54:02 2011 |
Katrin | Update | Green Locking | 60 Hz oscillation due to broken BNC cable | There was a 60 Hz and 120 Hz oscillation
on the green PDH photo diode output. After
a long search, I could identify that |
|
|
17431
|
Fri Jan 27 19:35:31 2023 |
yuta | Summary | BHD | 60 Hz noise investigations around IMC | So far different measurements are consistent
with the hypothesis that the 60 Hz noise
is from PSL frequency noise (40m/17423). |
6x |
|
6127
|
Sat Dec 17 00:00:03 2011 |
kiwamu | Update | Green Locking | 60 Hz line nose gone |
|
|
|
17413
|
Mon Jan 23 22:51:17 2023 |
yuta | Summary | BHD | 60 Hz harmonics side lobe investigations | [Paco, Yehonathan, Yuta]
Since we have installed BH44, we
are seeing side lobes of 60 Hz + harmonics |
|
|
3752
|
Thu Oct 21 12:15:02 2010 |
rana | Update | PEM | 6.9 Mag EQ in Gulf of California |
Magnitude
|
|
|
3166
|
Wed Jul 7 11:35:59 2010 |
Gopal | Update | WIKI-40M Update | 6.30.10 - 7.7.10 Weekly Update | Summary of this Week's Activities:
6/30: 2nd and 3rd drafts of Progress
Report |
|
|
3142
|
Wed Jun 30 11:35:06 2010 |
Gopal | Update | General | 6.23.10 - 6.30.10 Weekly Update | Summary of this Week's Activities:
6/23: LIGO Safety Tour; Simulink
Controls Tutorial |
|
|
3103
|
Wed Jun 23 12:31:36 2010 |
Gopal | Update | General | 6.16.10-6.23.10 Weekly Update | Summary of This Week's Activities:
6/16: LIGO Orientation; First Weekly
Meeting; 40m tour with Jenne; Removed WFS |
|
|
11139
|
Fri Mar 13 03:10:35 2015 |
Jenne | Update | LSC | 6+ CARM->REFL transitions, 1 DARM->AS transition | Much more success tonight.
I only started my tally after I got the CARM |
|
|
11140
|
Fri Mar 13 14:11:59 2015 |
rana | Update | LSC | 6+ CARM->REFL transitions, 1 DARM->AS transition | Since the DARM_OUT signal is only 500 counts_peak,
I don't see why AS55 whitening needs
to be switched on. |
|
|
12392
|
Wed Aug 10 15:34:24 2016 |
Steve | Update | SUS | 6 in-lbs torque driver for wire clamp screw | The 7.5 in-lb of Wiha seems at the upper
end of torque range for a 4-40 SS screw
Wiha 28502 ordered with range 5 |
|
|
11596
|
Mon Sep 14 23:12:49 2015 |
ericq | Update | LSC | 55MHz modulation phase effect on PRMI | With the adjustable delay line box installed
in the 55MHz modulation path, I've
measured the PRMI sensing matrix as a function |
|
|
11173
|
Wed Mar 25 18:48:11 2015 |
Koji | Summary | LSC | 55MHz demodulators inspection | [Koji Den EricG]
We inspected the {REFL, AS, POP}55
demodulators. |
|