| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2890
|
Thu May 6 18:43:58 2010 |
rana | Update | PEM | Noise floor of the Ranger Seismometer | I
added a noise model of the SR560 to the LISO
opamp.lib. This assumes you're |
|
|
1090
|
Fri Oct 24 22:30:38 2008 |
Jenne,rana | Update | PEM | Noise from Guralp Seismometer | Attached is a Power Spectrum of the noise
on the Vert1 channel of the Guralp seismometer.
The noise is in the several hundreds of |
|
|
3038
|
Wed Jun 2 18:36:20 2010 |
valera | DAQ | CDS | Noise generators in LSP | Alex wrote a new code to implement LSP
noise generator. The code is based on 64
bit random number generator from Numerical |
|
|
5624
|
Thu Oct 6 05:18:20 2011 |
kiwamu | Update | LSC | Noise in AS55 was from clipping : fixed | It turned
out the noise in AS55 was due to a clipping. |
|
|
710
|
Mon Jul 21 19:55:16 2008 |
rana,jenne | Configuration | IOO | Noise in MC_F | [COLOR=darkgreen]Jenne put the MC board on
extender today - its still that way but everything
is probably connected (check AO).[/COLOR]
|
|
|
5842
|
Tue Nov 8 18:06:43 2011 |
Mirko | Update | Adaptive Filtering | Noise injections to MC1-3 PIT & YAW | With fancy analysis tools approaching usability
I looked some more into noise projections
from PIT,YAW motion of the MC mirrors to |
7x |
|
2436
|
Mon Dec 21 01:14:08 2009 |
rana | Summary | Electronics | Noise measurement of the Rai Weiss FET preamp box | I shorted the input to the box and
then put its output into the SR560 (low noise,
G = 100, AC). I put the output of the SR560 |
|
|
2417
|
Tue Dec 15 00:02:10 2009 |
rana | Update | PEM | Noise of the Ranger SS-1 Seismometer | I wanted to see what the noise of the Ranger
seismometer should be. I used LISO and file
ranger.fil (in our LISO SVN) to calculate |
|
|
7040
|
Thu Jul 26 16:08:59 2012 |
Yaakov | Update | STACIS | Noise plot update | I have a tentative noise plot for the STACIS
that includes accelerometer noise, geophone
noise, and platform motion with the STACIS |
|
|
15751
|
Wed Jan 6 22:47:41 2021 |
gautam | Update | ALS | Noisy ALS | Summary:
I want to get back to locking the
interferometer so I can test out the newly |
|
|
15752
|
Thu Jan 7 19:16:11 2021 |
gautam | Update | ALS | Noisy ALS | I'm also wondering why the error monitors
for the X and Y loops report such wildly
different spectra for the suppressed frequency |
|
|
15753
|
Thu Jan 7 20:07:27 2021 |
Koji | Update | ALS | Noisy ALS | How about resurrecting the PSL table green
beat for the X arm to see if the non-fiber
setup shows the same level of the freq noise |
|
|
15754
|
Thu Jan 7 21:16:22 2021 |
gautam | Update | ALS | Noisy ALS | I thought about it, but wouldn't that
show up at the AUX PDH error point? Or because
the loop gain is so high there we wouldn't |
|
|
15755
|
Thu Jan 7 23:25:19 2021 |
Koji | Update | ALS | Noisy ALS | If the sensing noise level of the end PDH
degraded for some reason, it'd make the
out of loop stability worse without making |
|
|
15756
|
Fri Jan 8 20:01:11 2021 |
gautam | Update | ALS | Noisy ALS | I did this test today. The excess
noise around 100 Hz doesn't show up in
the green beat. |
|
|
13688
|
Mon Mar 19 15:02:29 2018 |
gautam | Update | ALS | Noisy MC sensing | The working hypothesis, since the excess
noise in single arm locks is coherent between
both arms, the excess sensing noise is frequency |
|
|
13679
|
Mon Mar 12 22:08:31 2018 |
gautam | Update | ALS | Noisy POX | [kevin, gautam]
we tested my noisy POX hypothesis
tonight. By locking the single arm with POX, |
|
|
13680
|
Mon Mar 12 23:57:31 2018 |
gautam | Update | ALS | Noisy POX | [kevin,
gautam] |
|
|
15728
|
Thu Dec 10 16:24:13 2020 |
gautam | Update | Equipment loan | Noliac PZT --> Paco | I gave one Noliac PZT from the two spare
in the metal PMC kit to Paco. There is one
spare left in the kit. |
|
|
11689
|
Wed Oct 14 16:53:22 2015 |
Koji | Update | General | Non inverting buffer for SR560 | Eric needed a buffer to drive low input
impedance (~130Ohm) of his pomona box, I
quickly made a non-iverting buffer with G=+10. |
|
|
1871
|
Mon Aug 10 11:33:58 2009 |
Jenne | Update | PSL | Non-Elogged Beam dump on the PSL table - BadBadBad | Big
thumbs down to whoever put a beam dump
on the PSL table in front of the PMC yesterday |
|
|
1873
|
Mon Aug 10 15:21:15 2009 |
Jenne | Update | PSL | Non-Elogged Beam dump on the PSL table - BadBadBad |
|
|
|
15934
|
Wed Mar 17 16:30:46 2021 |
Anchal | Update | SUS | Normalized Input Matrices plotted better than SURF students | Here, I present the same input matrices
now normalized row by row to have same norm
as current matrices rows. These now I plotted |
|
|
8417
|
Fri Apr 5 01:18:34 2013 |
Manasa | Update | 40m Upgrading | Not a fan of the new plastic box yet |
|
|
|
8419
|
Sat Apr 6 09:21:36 2013 |
rana | Update | 40m Upgrading | Not a fan of the new plastic box yet |
1) We still need to drill and
install the thumbscrew latches |
|
|
10962
|
Sat Jan 31 01:34:12 2015 |
Jenne | Update | LSC | Not able to engage AO path | Nothing earth-shattering today.
A few things of note:
I checked the coherence |
|
|
10715
|
Fri Nov 14 11:07:59 2014 |
manasa | Update | CDS | Not able to run models on FE machines |
|
|
|
6014
|
Sat Nov 26 02:15:42 2011 |
Mirko | Update | SUS | Not adaptive, still cool | [Rana, Mirko]
I tried out the virtual pendulum
idea today. The idea is to compensate the |
|
|
6057
|
Thu Dec 1 03:27:39 2011 |
Mirko | Update | SUS | Not adaptive, still cool |
|
|
|
3512
|
Thu Sep 2 01:48:23 2010 |
Jenne | Frogs | Treasure | Not cool.... | This totally creeped me out when I found
it wandering around on the floor not so far
from my desk: |
|
|
3273
|
Fri Jul 23 08:18:03 2010 |
josephb | Update | CDS | Not enough room in IO chassis for RFM card - need to swap PMC to PCIe adapters | The End IO chassis have small trenton boards,
which apparently only have 5 usuable PCI
slots, even though there are 6 on the board. |
|
|
1369
|
Sat Mar 7 16:50:25 2009 |
Yoichi | Update | Computers | Not even data retrieval working | Now our digital system is really in trouble.
We can't even get data from tp channels.
|
|
|
1370
|
Sun Mar 8 23:09:26 2009 |
rana | Update | Computers | Not even data retrieval working | Although getting the regular DAQ data works,
we can't get any testpoints.
|
|
|
11194
|
Thu Apr 2 04:11:20 2015 |
ericq | Update | LSC | Not much locking, Xover measurement | A paltry two locks tonight, but not entirely
useless. I had some issues keeping the PRMI
locked, which some additional boosts helped |
|
|
11195
|
Thu Apr 2 15:34:34 2015 |
ericq | Update | LSC | Not much locking, Xover measurement | Here's the comparison of last night's
crossover measurement to my loop model. Not
stellar, but not totally off base. All of |
|
|
11196
|
Thu Apr 2 17:11:28 2015 |
ericq | Update | LSC | Not much locking, Xover measurement | Whoops, I implemented the IOP downsampling
filters wrong. Once I did that, it looked
like just delay mismatch, so I added two |
|
|
10695
|
Tue Nov 11 01:38:23 2014 |
Koji | Update | LSC | Notch at 110MHz | To further reduce the RF power at 110MHz
in the REFL165 chain, I made a twin-t notch
in a pomona box. |
|
|
10699
|
Wed Nov 12 00:55:56 2014 |
ericq | Update | LSC | Notch at 110MHz |
|
|
|
14510
|
Wed Apr 3 09:04:01 2019 |
gautam | Update | ALS | Note about new fiber couplers | The new fiber beam splitters we are ordering,
PFC-64-2-50-L-P-7-2-FB-0.3W,
have the slow axis working and fast axis |
|
|
14513
|
Wed Apr 3 12:32:33 2019 |
Koji | Update | ALS | Note about new fiber couplers | Andrew seems to have an integrated solution
of PBS+HWP in a singe mount. Or, I wonder
if we should use HWP/QWP before the coupler. |
|
|
713
|
Tue Jul 22 11:55:22 2008 |
rana | Update | PSL | Note from R. Abbott re: the PMC | an email from Rich:
[CODE]Your PZT is broken.
|
|
|
714
|
Tue Jul 22 13:15:14 2008 |
rob | Update | PSL | Note from R. Abbott re: the PMC | [quote]an email from Rich:
[CODE]Your PZT is broken.
|
|
|
10027
|
Wed Jun 11 15:57:18 2014 |
Jenne | Update | CDS | Note on cables for talking to slow computers | We have (now) in the lab 2 cables that
are RJ45-DB9. The gray one is LIGO-made,
while the blue one is store-bought. |
|
|
10033
|
Thu Jun 12 15:31:47 2014 |
Jamie | Update | CDS | Note on cables for talking to slow computers |
|
|
|
7237
|
Mon Aug 20 23:31:49 2012 |
Jenne | Update | CDS | Note to self - fast PSL chans | Rana points out that we haven't had fast
channels for PMC (trans, refl, pzt), input
laser things, more FSS things since the upgrade. |
|
|
15958
|
Wed Mar 24 15:24:13 2021 |
gautam | Update | LSC | Notes on tests | For my note-taking:
Lock PRMI with ITMs as
the MICH actuator. Confirm that the MICH-->PRCL |
|
|
14410
|
Sun Jan 20 23:41:00 2019 |
Jon | Omnistructure | VAC | Notes on vac serial comm, adapter wiring | I've attached my handwritten notes
covering all the serial communications in
the vac system, and the relevant wiring for |
|
|
17084
|
Wed Aug 17 01:18:54 2022 |
Koji | Update | General | Notice: SURF SUS test setup blocking the lab way | Juan and I built an analog setup to measure
some transfer functions of the MOS suspension.
The setup is blocking the lab way around |
|
|
17093
|
Fri Aug 19 15:20:14 2022 |
Koji | Update | General | Notice: SURF SUS test setup blocking the lab way | The setup was (at least partially) cleared. |
|
|
11308
|
Tue May 19 11:24:44 2015 |
ericq | Update | Computer Scripts / Programs | Notification Scheme | Given some of the things we've facing
lately, it occurs to me that we could be
better served by having some sort of unified |
|