| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
10851
|
Sun Jan 4 22:08:46 2015 |
rana | Update | IOO | MC loop characterizations: PZT/EOM crossover | * PMC + MC were unlocked when I came
in.
* I fiddled around some more with |
|
|
8906
|
Tue Jul 23 13:55:08 2013 |
Koji | Update | IOO | MC manually aligned | The MC was manually aligned. The spot positions
were measured and it is consistent with the
measurements done yesterday. |
|
|
9030
|
Mon Aug 19 11:30:20 2013 |
Jenne | Update | IOO | MC mirrors' ASC has non-zero inputs | [Masayuki, Jenne]
When I came in this morning, I noticed
that the Mode Cleaner had not been locked |
|
|
9032
|
Mon Aug 19 15:23:07 2013 |
Koji | Update | IOO | MC mirrors' ASC has non-zero inputs | [Jenne, Koji]
This disturbance in the MC ASC channels
were fixed. |
|
|
5236
|
Mon Aug 15 10:58:52 2011 |
kiwamu | Update | IOO | MC misaligned a lot | This morning Steve and I opened the doors
on the IOO and OMC chamber to let the IR
beam go to MC. |
|
|
15173
|
Wed Jan 29 03:05:47 2020 |
rana, gautam | Update | SUS | MC misalignments / sat box games | In the last couple days, as the IMC ringdowns
have been going on, we have noticed that
the MC is behaving bad. Misaligning, drifting, |
|
|
4340
|
Tue Feb 22 23:40:31 2011 |
Koji | Update | IOO | MC mode mach improvement | As per Kiwamu's request I made a light
touch to the input steering and the mode
matching lens. |
|
|
9632
|
Thu Feb 13 13:18:33 2014 |
manasa | Update | IOO | MC needed some help | The MC has been funny since yesterday.
I checked the suspensions INMON channels
and they seemed ok. So I went ahead and tweaked |
|
|
5928
|
Thu Nov 17 17:03:28 2011 |
MIrko | Update | IOO | MC noise projection | Another go at the noise projection from
MC1-3 pit/yaw to MC length. This time injecting
into the MC autoalignment FB (e.g. C1:IOO-WFS1_PIT_EXC |
11x |
|
9322
|
Thu Oct 31 15:34:28 2013 |
manasa | Update | IOO | MC not happy since yesterday |
|
|
|
1803
|
Wed Jul 29 11:58:57 2009 |
Alberto | Update | PSL | MC not locking | This morning I found the Mode Cleaner unlocked.
I check the sliders for the mirrors
bias and they have not changed. Also the |
|
|
872
|
Fri Aug 22 17:03:41 2008 |
Yoichi | Update | IOO | MC open loop TF | I measured the open loop TF of the overall
MC loop using the sum-amp A of the MC board.
I used the Agilent 4395A network analyzer |
|
|
928
|
Thu Sep 4 17:17:03 2008 |
Yoichi | Update | IOO | MC open loop TF | I measured open loop transfer functions of
the MC servo.
The UGF was about 30kHz. Since there was |
|
|
2698
|
Tue Mar 23 00:31:51 2010 |
Koji | Update | IOO | MC realigned | This is the first touch to the MC mirrors
after the earthquake on 16th.
I made an aluminum access |
|
|
5990
|
Wed Nov 23 16:55:57 2011 |
Suresh | Update | IOO | MC realigned | The PSL alignment into the MC was too poor
for the autolocker to engage. So retaining
the last coil slider settings on the MC_Align |
|
|
5283
|
Tue Aug 23 02:03:04 2011 |
Suresh | Update | IOO | MC realigned and spot positions recentered | After the MC1 and MC3 OSEMs were
repositioned
MC had to be realigned and the beam spots |
|
|
5799
|
Thu Nov 3 17:19:54 2011 |
Suresh | Update | IOO | MC realigned to center the spots on actuation nodes | Several activities in the past week (elog1,
Mirko's rough realignment of MC and adjustment |
|
|
5803
|
Thu Nov 3 22:32:48 2011 |
Suresh | Update | IOO | MC realigned to center the spots on actuation nodes |
|
|
|
503
|
Thu May 29 15:58:44 2008 |
John | Summary | IOO | MC realignment | I repeatedly adjusted the yaw of the upper
mirror on the input periscope and re aligned
the MC. With the PRM aligned I tried to optimise |
|
|
5482
|
Tue Sep 20 15:54:42 2011 |
kiwamu | Update | Cameras | MC refl camera is available | [Suresh / Kiwamu]
The
MC REFL camera is now available. The camera |
|
|
2444
|
Tue Dec 22 11:23:51 2009 |
kiwamu, Steve | Update | IOO | MC relocked | In this morning I found MC unlocked.
Steve restored the watchdogs before
I found that. |
|
|
9999
|
Wed May 28 14:13:06 2014 |
manasa | Update | IOO | MC relocked |
|
|
|
18
|
Fri Oct 26 16:19:29 2007 |
Tobin Fricke | Routine | IOO | MC resonances | We would like to measure the absorption of
the mode cleaner optics. The plan is to
repeat <a href="http://ilog.ligo-wa.caltech.edu:7285/mLIGO/Cleaning_the_Mode_Cleaner">Valera's |
|
|
80
|
Wed Nov 7 14:05:59 2007 |
tobin | Configuration | IOO | MC ringdown | Modeling the mode cleaner as a simple cavity
with all losses lumped together, we expect
the cavity power to be
|
|
|
74
|
Wed Nov 7 00:51:33 2007 |
andrey, rob, tobin | Configuration | IOO | MC ringdowns | We completed several ringdown measurements
this afternoon; Andrey is currently processing
the data. |
|
|
16272
|
Fri Aug 6 17:10:19 2021 |
Paco | Update | IMC | MC rollercoaster | [anchal, yehonatan, paco]
For whatever reason (i.e. we don't
really know) the MC unlocked into a weird |
|
|
7339
|
Tue Sep 4 20:06:04 2012 |
Jenne | Update | Locking | MC scan input switched to the 11MHz port of EOM | Since the EOM's signal combiner (splitter
backwards) is frequency-independent, Koji
and Jamie (in the proper turn off, turn on |
|
|
10285
|
Tue Jul 29 16:41:54 2014 |
Koji | Update | LSC | MC servo | The MC openloop gains were measured
with several conditions
- MC fast/PC crossover was measured |
|
|
10293
|
Wed Jul 30 00:42:27 2014 |
Koji | Update | LSC | MC servo | I used an oscillator and an oscilloscope
to measure the open loop transfer function
at higher frequency than 100kHz. |
|
|
10300
|
Wed Jul 30 22:01:24 2014 |
Koji | Update | LSC | MC servo | In fact there is a pomona box between the
HV amp and the laser.
It is expected that the combination |
|
|
10235
|
Fri Jul 18 14:59:07 2014 |
Evan | Update | IOO | MC servo TFs | [Rana, Evan]
This morning we took several TFs
of the MC servo board using the HP4395A. |
|
|
10251
|
Tue Jul 22 08:36:08 2014 |
Evan | Update | IOO | MC servo TFs |
|
|
|
10322
|
Fri Aug 1 12:49:06 2014 |
Koji | Summary | IOO | MC servo analysis | Reasoning to choose the current parameters:
FSS Common: 18dB
FSS Fast: 20dB |
|
|
10343
|
Thu Aug 7 11:57:59 2014 |
Koji | Summary | IOO | MC servo analysis | LISO Fit for the IMC open loop TF. The
data and liso source for the fitting were
attached in the ZIP file. |
|
|
10351
|
Fri Aug 8 12:39:19 2014 |
ericq | Summary | IOO | MC servo analysis | I have measured the current boosted MC
CLG below 100kHz with an SR785. Swept sine
only could get me down to 10kHz, but I was |
|
|
10354
|
Fri Aug 8 15:57:29 2014 |
ericq | Summary | IOO | MC servo analysis | I did some further measurements,
to try and see what corresponds to what.
In the end I performed four measurements: |
|
|
10356
|
Fri Aug 8 18:08:12 2014 |
Koji | Summary | IOO | MC servo analysis | The closed gain I meant is the AO path:
Use IN2 to excite the MC loop and measure
IN1 using MON2(?). |
|
|
10359
|
Sat Aug 9 14:35:28 2014 |
Koji | Summary | IOO | MC servo analysis | Eric's OLTF turned out consistent with
the AO path TF that has been measured by
me on Jul 31 (entry |
|
|
10243
|
Sun Jul 20 09:26:27 2014 |
Evan | Update | Electronics | MC servo card modifications in DCC |
|
|
|
10250
|
Tue Jul 22 08:24:42 2014 |
Evan | Update | Electronics | MC servo card: modified schematic |
|
|
|
4360
|
Sat Feb 26 00:25:38 2011 |
Koji | Update | IOO | MC servo improvement | [Rana / Koji]
The MC servo loop has been investigated
as the MC servo was not an ideal state. |
|
|
4366
|
Wed Mar 2 04:01:51 2011 |
Koji | Update | IOO | MC servo improvement | [Koji / Rana]
- Since the MC servo had UGF up to
~20kHz and huge servo bump at 50kHz, we needed |
|
|
10320
|
Fri Aug 1 10:40:48 2014 |
Koji | Summary | IOO | MC servo summing amp | The
summing amp is prepared to allow up to use
bipolar full range of the FSS box output
|
|
|
10722
|
Mon Nov 17 20:28:17 2014 |
rana | Summary | IOO | MC servo summing amp | I modified the /cvs/cds/caltech/target/c1psl/psl.db
file to adjust the records for the FSS-FAST
signal (to make it go yellow / red at the |
|
|
7742
|
Mon Nov 26 10:06:51 2012 |
rana | Summary | IOO | MC slides from 2002 | |
|
|
2880
|
Wed May 5 01:19:05 2010 |
Koji | Update | IOO | MC spot centering cont"d | Koji and Zach
We improved the beam axis rotaion
on the MC. We still have |
|
|
2884
|
Thu May 6 01:06:16 2010 |
Koji | Update | IOO | MC spot centering cont'd (Triumph) | Zach and Koji,
We
finally aligned the incident beam enough |
|
|
13762
|
Wed Apr 18 19:02:15 2018 |
gautam | Update | IOO | MC spot centering scripts | I'm working on fixing these (and the
associated MEDM scripts) up so that we can
get some reliable readback on how well centered |
|
|
5813
|
Fri Nov 4 16:23:41 2011 |
Suresh | Update | IOO | MC spot decenter measured | After Kiwamu adjusted the MC2 PIT to accommodate
the limited range of the PZT1 ( elog
), I remeasured the spot positions |
|
|
5839
|
Tue Nov 8 10:34:42 2011 |
Suresh | Update | IOO | MC spot decenter measured |
|
|