ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
5994
|
Thu Nov 24 02:23:43 2011 |
Koji | Summary | General | GPIB<->WIFI | GPIB<->WIFI on Agilent Network Analyzer
4395A was broken.
The |
|
5995
|
Thu Nov 24 05:10:00 2011 |
Koji | Update | IOO | RFAMPD channels / EOM monitor channels added to DAQ | EOM TEMPMON and HEATER DRIVEMON have been
hooked up to the following channels.
C1:IOO-EOM_TEMPMON |
|
5996
|
Thu Nov 24 05:47:16 2011 |
Koji | Summary | IOO | Stochmon running | Now stochmon for 11MHz and 55MHz is running.
The calibration / noise measurement are going
to be post later... |
|
5997
|
Thu Nov 24 10:27:07 2011 |
Jenne | Update | IOO | RFAMPD channels / EOM monitor channels added to DAQ | Here is a drawing of where the monitors
are coming from:
|
|
5998
|
Thu Nov 24 12:45:12 2011 |
Zach | Update | IOO | RFAMPD channels / EOM monitor channels added to DAQ | Jenne |
|
5999
|
Thu Nov 24 13:54:31 2011 |
Koji | Update | IOO | RFAMPD channels / EOM monitor channels added to DAQ | Those clips for the readouts were the ones
who popped out.
When I have restored the connections, |
|
6000
|
Thu Nov 24 14:05:10 2011 |
Koji | Update | PSL | HEPA@50% | I left the HEPA at the 50% level @5AM,
Nov 24 |
|
6001
|
Thu Nov 24 14:42:57 2011 |
Koji | Update | elog | elogd gained an immunity to googlebot | I modified elogd.c as shown below in order
not to allow to display all of the entries
at once by specifying page number "0". |
|
6002
|
Thu Nov 24 15:27:15 2011 |
kiwamu | Update | CDS | c1iscey hardware rebooted | The
c1iscey machine crashed around 1:00 AM last
night and I did a hard-ware reboot |
|
6003
|
Thu Nov 24 15:48:27 2011 |
Illustrator | Update | elog | elogd gained an immunity to googlebot | |
 |
6004
|
Thu Nov 24 20:22:42 2011 |
Mirko | Update | IOO | F2A filter for MC | I calculated the F2A filters for the input
mode cleaner optics as described in T010140-01-D
eq (4). On Ranas recommendation I added an |
 |
6005
|
Fri Nov 25 12:46:13 2011 |
Mirko | Update | WienerFiltering | Wiener filtering tryout | Tried the wiener filter with the TF from
p.5900
Tried it out with the TFs from p.5900: |
|
6006
|
Fri Nov 25 17:52:28 2011 |
rana | Update | IOO | F2A filter for MC | Woo. Pretty crazy. The numerators should
only be ~10% larger than the denominator
below 1 Hz. Let's try again. |
|
6007
|
Fri Nov 25 18:45:31 2011 |
Den, Rana | Summary | SUS | Excess Noise in Digital Filtering | We are now trying to understand why the
coherence between SUS-X_SUSPOS_IN1 and SUS-X_SUSPOS_OUT
is lost below 1 Hz for X = MC1, MC2, MC3, |
|
6008
|
Fri Nov 25 19:45:36 2011 |
Mirco, Den | Summary | SUS | Excess Noise in Digital Filtering |
|
 |
6009
|
Fri Nov 25 20:03:05 2011 |
Koji | Update | IOO | Stochmon update | New RFAM mon calibration |
|
6010
|
Fri Nov 25 20:41:48 2011 |
rana | Update | SUS | MC watchdogs | It seems as if someone was looking into
this on Wednesday, but as there's no elog,
I think probably not. |
|
6011
|
Fri Nov 25 22:11:12 2011 |
Mirko | Update | CDS | Beware of fancy filter modules | [Rana, Den, Mirko]
It seems you can shoot yourself in
the foot if your filter modules are too complex. |
   |
6012
|
Fri Nov 25 23:25:24 2011 |
Mirko | Update | IOO | F2A filter for MC |
|
|
6013
|
Sat Nov 26 02:05:43 2011 |
Mirko | Update | CDS | Beware of fancy filter modules |
We replaced the complicated Cheby
filter module with three separate filter |
|
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 |
  |
6015
|
Sat Nov 26 07:18:11 2011 |
Suresh | Update | IOO | MC WFS related changes to c1ioo model | What I did:
I have changed
the c1ioo model such that the signals which |
 |
6016
|
Sat Nov 26 07:22:20 2011 |
suresh | Update | Computers | | c1sus has been shutdown so that the optics
dont bang around. This is because the
watch dogs are not working. |
|
6017
|
Sat Nov 26 10:55:40 2011 |
rana | Update | CDS | Beware of fancy filter modules |
Could be that what we're seeing
is the noise floor of the Direct Form II |
|
6018
|
Sat Nov 26 19:07:40 2011 |
kiwamu | Summary | Green Locking | AM trnasfer function of the Y end laser with doublin crystal |
|
 |
6019
|
Sat Nov 26 19:37:12 2011 |
Den | Update | General | foton files | I've checked foton files for small
numbers. There are several other filters
besides " |
|
6020
|
Mon Nov 28 06:53:30 2011 |
kiwamu | Update | CDS | c1sus shutdown | I have restarted the c1sus machine around
9:00 PM yesterday and then shut it down around
4:00 AM this morning after a little bit of |
|
6021
|
Mon Nov 28 10:54:40 2011 |
rana | Update | SUS | F2A filter for MC | Our
approach to making the F2A or F2P filters |
|
6022
|
Mon Nov 28 14:27:35 2011 |
Jenne | Update | RF System | EOM temp driver | Here is 5 days of trend of the EOM temp
sensor and the heater driver monitor.
Unfortunately, it looks like we're regularly |
|
6023
|
Mon Nov 28 14:40:43 2011 |
Koji | Update | RF System | EOM temp driver |
|
|
6024
|
Mon Nov 28 15:00:20 2011 |
kiwamu | Update | Green Locking | Y arm ALS engaged |
|
|
6025
|
Mon Nov 28 15:43:36 2011 |
steve | Update | RF System | EOM temp zoomed |
|
|
6026
|
Mon Nov 28 16:46:55 2011 |
kiwamu | Update | CDS | c1sus is now up | I have restarted the c1sus machine and
burt-restored c1sus and c1mcs to the day
before Thank giving, namely 23rd of November. |
|
6027
|
Mon Nov 28 16:51:57 2011 |
kiwamu | Update | LSC | modulation frequency reset | I reset the modulation frequency to 11065910
Hz (#5530).
It had been at 11065399 Hz probably since |
|
6028
|
Mon Nov 28 18:19:53 2011 |
kiwamu | Update | IOO | Stochmon seems working | Here is a 48 hours trend of the RFAM
monitor (a.k.a StochMon):
|
|
6029
|
Mon Nov 28 18:53:35 2011 |
Den | Summary | WienerFiltering | seismic noise substraction | There is still a problem why GUR, STS signals
are poorly coherent to MC_L. But at
least we can see coherence at 2-5 Hz. It |
9x |
6030
|
Mon Nov 28 19:24:51 2011 |
Jenne | Update | CDS | Beware of fancy filter modules | [Rana, Jenne]
Some of the funniness is some kind
of mysterious interaction between 2 filter |
    |
6031
|
Mon Nov 28 22:09:24 2011 |
rana | Update | CDS | Beware of fancy filter modules | To see what might be causing the problem,
I used a version of the filter noise test
matlab code that Matt had in the elog. |
|
6032
|
Tue Nov 29 02:09:15 2011 |
Zach | Update | RF System | EOM temp stabilization fixed | I inspected the temperature stabilization
circuit today to see why it wasn't working.
It didn't make sense that it just kept railing |
|
6033
|
Tue Nov 29 04:47:49 2011 |
kiwamu | Update | CDS | c1sus shut down again | I have shut down the c1sus machine at 3:30
AM. |
|
6034
|
Tue Nov 29 07:45:56 2011 |
rana, josh | Summary | Computer Scripts / Programs | 40m Daily News web pages | As part of the initiative to
get a good daily summary page for aLIGO commissioning,
Josh is spearheading his |
|
6035
|
Tue Nov 29 14:22:03 2011 |
Zach | Update | RF System | EOM temp stabilization performance | I left the EOM stabilization running overnight,
so we can finally see how the EOM temperature
stabilization does over long periods of time. |
  |
6036
|
Tue Nov 29 15:25:29 2011 |
steve | Update | RF System | EOM temp stabilization performance | It is not obvious what is working.
|
|
6037
|
Tue Nov 29 15:30:01 2011 |
jamie | Update | CDS | location of currently used filter function | So I tracked down where the currently-used
filter function code is defined (the following
is all relative to /opt/rtcds/caltech/c1/core/release): |
|
6038
|
Tue Nov 29 15:57:43 2011 |
Den | Update | CDS | location of currently used filter function |
We are interested in the following
question : Can the structures defined in |
|
6039
|
Tue Nov 29 17:10:39 2011 |
Den | Update | digital noise | SOS creation | One of the possibilities that we see a
large low-frequency digital noise is due
to Foton. I've checked the SOS coefficients |
|
6040
|
Tue Nov 29 18:17:27 2011 |
Zach | Update | RF System | EOM temp stabilization performance |
|
|
6041
|
Tue Nov 29 18:31:40 2011 |
Den | Update | digital noise | Foton error | In the previous elog we've compared
Matlab and Foton SOS representations using
low-order filter. Now we move on to high |
|
6042
|
Tue Nov 29 18:54:29 2011 |
kiwamu | Update | CDS | c1sus machine up | [Zach / Kiwamu]
Woke up the c1sus machine in
order to lock PSL to MC so that we can observe |
|
6043
|
Tue Nov 29 19:08:53 2011 |
Zach | Update | RF System | EOM heater disconnected | I disconnected the heater at ~2:20
UTC, leaving the sensor circuit
operational. Don't be fooled by the apparent |
|