| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
10698
|
Tue Nov 11 21:41:09 2014 |
Koji | Update | LSC | 3f DRMI sensing mat | Sensing
matrix calculation using DTT + Matlab
Note: If the signal phase is, for |
|
|
10701
|
Wed Nov 12 03:22:23 2014 |
Jenne | Update | LSC | 3f DRMI sensing mat | Koji pointed out something to me that I
think he had told me ages ago, and Rana alluded
to last night: Since I'm not tuning |
8x |
|
10696
|
Tue Nov 11 03:48:46 2014 |
Jenne | Update | LSC | 3f DRMI | I was
able to lock the DRMI on 3f signals this
evening, although the loops are not stable, |
|
|
10668
|
Wed Nov 5 01:58:54 2014 |
ericq | Update | LSC | 3F RFPD RF spectra | Given the checkout of the aLIGO BBPDs happening
(aLOG
link), wherein the PDs were acting funny, |
|
|
10669
|
Wed Nov 5 11:09:44 2014 |
Koji | Update | LSC | 3F RFPD RF spectra | If you look at the intermodulation at 14
(4+10) and 16 (6+10), 15 (5+10) would make
any problem, thanks to the notch at 1f and |
|
|
10673
|
Wed Nov 5 22:25:42 2014 |
ericq | Update | LSC | 3F RFPD RF spectra |
Now that I have followed the chain,
the PD signal is indeed being amplified at |
|
|
10675
|
Thu Nov 6 01:58:55 2014 |
Koji | Update | LSC | 3F RFPD RF spectra | Where is the PD out spectrum measured with
the coupler??? |
|
|
10679
|
Thu Nov 6 11:49:58 2014 |
ericq | Update | LSC | 3F RFPD RF spectra |
|
|
|
10682
|
Thu Nov 6 14:41:49 2014 |
Koij | Update | LSC | 3F RFPD RF spectra | That's not what I'm asking.
Also
additional cables are left connected to the |
|
|
10683
|
Fri Nov 7 02:21:12 2014 |
ericq | Update | LSC | 3F RFPD RF spectra |
After some enlightening conversation
with Koji, we figured that the RF amplifier |
|
|
10685
|
Fri Nov 7 14:41:18 2014 |
ericq | Update | LSC | 3F RFPD RF spectra |
|
|
|
10686
|
Fri Nov 7 16:15:53 2014 |
Jenne | Update | LSC | 3F RFPD RF spectra | I have found an SHP-150, but no SHP-175's
(also, several 200's, and a couple of 500's).
Why do you say the SHP-150 isn't |
|
|
10689
|
Sat Nov 8 11:35:05 2014 |
rana | Update | LSC | 3F RFPD RF spectra |
I think 'saturation'
here is a misleading term to think about. |
|
|
10692
|
Mon Nov 10 18:11:57 2014 |
ericq | Update | LSC | 3F RFPD RF spectra | Jenne and I measured the situation
using a SHP-150 directly attached to the
REFL165 RF output, and at first glance, the |
|
|
11010
|
Thu Feb 12 03:43:54 2015 |
ericq | Update | LSC | 3F PRMI at zero ALS CARM | I have been able to recover the ability
to sit at zero CARM offset while the PRMI
is locked on RELF33 and CARM/DARM are on |
|
|
2126
|
Tue Oct 20 16:35:24 2009 |
rob | Configuration | LSC | 33MHz Mod depth | The 33MHz mod depth is now controlled by
the OMC (C1:OMC-SPARE_DAC_CH_15). The
setting to give us the same modulation depth |
|
|
4151
|
Thu Jan 13 16:34:02 2011 |
josephb | Update | Computers | 32 bit matlab updated | There
was a problem with running the webview report
generator in matlab on Mafalada. It |
|
|
9115
|
Fri Sep 6 09:27:10 2013 |
Steve | Update | VAC | 31 days after pumpdown |
|
|
|
1449
|
Wed Apr 1 15:47:48 2009 |
Yoichi | Update | Locking | 3.8kHz peak looks like a real optical response of the interferometer | Yoichi, Peter
To see where the 3.8kHz peak comes from, |
|
|
1450
|
Wed Apr 1 16:14:36 2009 |
Yoichi | Update | Locking | 3.8kHz peak does not change with SRC offset | Yoichi, Peter
We suspected that maybe the 3.8kHz peak is |
|
|
1433
|
Thu Mar 26 04:27:26 2009 |
Yoichi | Update | Locking | 3.8kHz peak as a function of the arm power | During the power ramp-up, I actuated CARM
using ETMs and measured the transfer functions
to the PO_DC at several arm powers.
|
|
|
580
|
Thu Jun 26 22:08:33 2008 |
Jenne | Update | Electronics | 3.7MHz bandstop filter in MC Servo | The 3.7MHz elliptical bandstop filter that
I made during my SURF summer is now installed
in the MC servo loop to reduce the noise |
|
|
8526
|
Fri May 3 08:55:55 2013 |
Steve | Update | PEM | 3.2 M earthquake | |
|
|
15929
|
Wed Mar 17 10:52:48 2021 |
Jordan | Update | SUS | 3" Ring Adpater for SOS | I have added a .1", 45deg chamfer
to the bottom of the adapter ring. This was
added for a new placement of the eq stops, |
|
|
9549
|
Mon Jan 13 11:08:48 2014 |
Steve | Update | PSL | 3 good days of IOO pointing | Three good days of IOO pointing:
Friday, Sat and Sun What
was changed? May be the clamping on |
|
|
5970
|
Mon Nov 21 16:08:04 2011 |
kiwamu | Update | Green Locking | 2nd trial of Y arm ALS noise budget : broad band noise gone |
|
|
|
1872
|
Mon Aug 10 14:58:01 2009 |
Jenne | Update | PEM | 2nd set of Guralp channels plugged into ADCU | The second set of Guralp channels is now
plugged into the PEM ADCU, into channels
which are confirmed to be working. |
|
|
1882
|
Mon Aug 10 18:12:25 2009 |
Jenne | Update | PEM | 2nd set of Guralp channels plugged into ADCU |
|
|
|
3676
|
Fri Oct 8 07:41:42 2010 |
steve | Configuration | SAFETY | 2W laser shutter is closed | The 2 W Innolight shutter is closed and
enclosure door removed. Beam path blocked.
Do not change this condition. |
|
|
3677
|
Fri Oct 8 10:38:03 2010 |
steve | Configuration | SAFETY | 2W laser shutter is closed |
|
|
|
2883
|
Wed May 5 16:58:21 2010 |
Koji | Update | PSL | 2W hooked up to the interlock service | Ben, Steve, and Koji
Ben came to the 40m and hooked up
a cable to the main interlock service. |
|
|
2837
|
Sat Apr 24 15:05:41 2010 |
Kevin | Update | PSL | 2W Vertical Beam Profile | The vertical beam profile of the Innolight
2W laser was measured at eight points along
the axis of the laser. |
|
|
3041
|
Wed Jun 2 22:58:04 2010 |
Kevin | Update | PSL | 2W Second Reflected Beam Profile | [Koji, Kevin]
The profile of the Innolight 2W was
previously measured by measuring the reflected |
|
|
3725
|
Thu Oct 14 23:33:45 2010 |
Suresh | Update | IOO | 2W NPRO laser output power versus temperature | Steve
measured an apparent power drop in the 2W
NPRO output from 2.1W to 1.6W(elog entry |
|
|
3726
|
Fri Oct 15 00:15:52 2010 |
Koji | Update | IOO | 2W NPRO laser output power versus temperature | From the plot, you observed the reduction
of the output power only by 1% between 25deg
to 45deg. |
|
|
3730
|
Fri Oct 15 21:25:23 2010 |
Suresh | Update | IOO | 2W NPRO laser output power drop question | The power meter used in the measurements
of elog entries 2822, 3698 and 3709 was the
Ophir PD300-3W. This power head has |
|
|
3491
|
Mon Aug 30 23:21:36 2010 |
rana | HowTo | PSL | 2W NPRO Mount designed with emachineshop.com software | To test out this website - emachineshop.com,
Jenne and I are designing some of the mounts
for the new beam height. |
|
|
3503
|
Wed Sep 1 08:36:59 2010 |
Koji | HowTo | PSL | 2W NPRO Mount designed with emachineshop.com software | 1. I can not see whether the attaching
surface is flat or not.
It should have ~1mm step to avoid |
|
|
3042
|
Thu Jun 3 00:47:17 2010 |
Kevin | Update | PSL | 2W Beam Profile of Second Reflected Beam | [Koji, Kevin]
The profile of the Innolight 2W was |
|
|
3030
|
Wed Jun 2 03:24:22 2010 |
Kevin | Update | PSL | 2W Beam Profile | [Rana, Kiwamu, Kevin]
The Innolight 2W beam profile was
measured with the beam scan. A W2-IF-1025-C-1064-45P |
|
|
3032
|
Wed Jun 2 04:27:02 2010 |
Koji | Update | PSL | 2W Beam Profile | This is what I already told to Kevin and
Rana:
A direct output beam is |
|
|
566
|
Wed Jun 25 12:25:28 2008 |
Eric | Summary | Cameras | 2D Gaussian Fitting Code | I initially wrote a script in MATLAB that
takes pictures of the laser beam's profile
and fits them to a two dimensional gaussian |
|
|
12801
|
Sun Feb 5 21:56:50 2017 |
Lydia | Update | IMC | 29.5 MHz stabilizer box replacement | Since the "stablizer box" doesn't
really need to stabilize, it just needs to
amplify, I decided to replace it with an |
|
|
12807
|
Tue Feb 7 12:01:10 2017 |
Lydia | Update | IMC | 29.5 MHz stabilizer box replacement | I tested the amplifier with the Agilent
network analyzer and measured 19.5 dB
of gain between 29 and 30 mHz. The phase |
|
|
12809
|
Tue Feb 7 17:00:55 2017 |
Lydia | Update | IMC | 29.5 MHz stabilizer box replacement | I set everything up and connected it as
shown on the block diagram attached to the
previous entry, with the exception |
|
|
12816
|
Fri Feb 10 02:14:10 2017 |
gautam | Update | IMC | 29.5 MHz stabilizer box replacement | Lydia finished up installing the new RF
amplifier, and will elog the details of the
installation. |
|
|
12817
|
Fri Feb 10 11:41:43 2017 |
Lydia | Update | IMC | 29.5 MHz stabilizer box replacement | To install the replacement amplifier, I
did the following:
Mounted the amplifier in |
|
|
12819
|
Fri Feb 10 13:24:28 2017 |
rana | Update | IMC | 29.5 MHz stabilizer box replacement | To remind myself about how to put filter
caps on the mini-circuits RF Amps, I looked
at Koji's recent |
|
|
12755
|
Wed Jan 25 15:41:29 2017 |
Lydia | Update | IMC | 29.5 MHz modulation depth measurement plan | [Lydia, gautam]
To measure the modulation depth
of the 29.5 MHz sideband, we plan to connect |
|
|
12756
|
Wed Jan 25 17:30:03 2017 |
Koji | Update | IMC | 29.5 MHz modulation depth measurement plan | I'm afraid that the bidirectional coupler,
designed to be 50ohm in/out, disturbs the
resonant circuit designed for the EOM which |
|