| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
11842
|
Thu Dec 3 06:15:38 2015 |
rana | Update | Optical Levers | Calibration of oplevs for ITMX/ETMX | http://blogs.mathworks.com/loren/2007/12/11/making-pretty-graphs/
Let Loren help you make your Oplev
data readable to humans. |
|
|
11841
|
Thu Dec 3 03:01:07 2015 |
gautam | Update | LSC | Calibration of C1CAL | [ericq, gautam]
While trying to resolve the strange
SRCL loop shape seen yesterday (which has |
|
|
11840
|
Wed Dec 2 18:54:20 2015 |
gautam | Update | CDS | Changes to C1MCS, C1PEM | Summary:
I've
made several changes to the C1MCS model and |
|
|
11839
|
Wed Dec 2 17:14:33 2015 |
yutaro | Update | LSC | Beam on POX11 is possibly not centered well | I checked how POXDC level changes when
the angle of ITMX is varied. ETMX was misaligned.
Then I found that in YAW direction |
|
|
11838
|
Wed Dec 2 15:52:28 2015 |
yutaro | Update | LSC | restoration of POXDC | I disconnected the |
|
|
11837
|
Wed Dec 2 15:08:41 2015 |
ericq | Update | Computer Scripts / Programs | Donatella sudo problem resolved | Somehow, the controls
user account on donatella lost its membership
to the sudoers |
|
|
11836
|
Wed Dec 2 03:34:30 2015 |
ericq | Update | LSC | SRCL OLG weirdness | [gautam, ericq]
Since ETMX seems to have been on
good behavior lately, we tried to fire the |
|
|
11835
|
Tue Dec 1 20:20:16 2015 |
Koji | Update | General | Megatron maitenence | MC Autolocker got stack somewhere. I had
to go to megatron and kill MC Autolocker.
init relaunched the autolocker |
|
|
11834
|
Tue Dec 1 17:26:14 2015 |
Koji | Update | General | Megatron maitenence | SLOWDC servo was dead. I followed EricQ's
instruction. |
|
|
11833
|
Tue Dec 1 17:16:31 2015 |
gautam | Update | CDS | Script for copying BLRMS filters | We've been talking about putting in
BLRMS filters for several channels - it would
be a pain to manually copy over the correct |
|
|
11832
|
Tue Dec 1 16:55:04 2015 |
Steve | Update | VAC | Dataviewer fixed | Q adjusted the Dataviewer so it is not
chopping of data any more. Thanks.
|
|
|
11831
|
Tue Dec 1 11:26:23 2015 |
yutaro | Update | Optical Levers | Calibration of oplevs for ITMX/ETMX | With the same method as reported in elog
11785, I calibrated oplevs for ITMX/ETMX. |
|
|
11830
|
Tue Dec 1 10:52:52 2015 |
Steve | Update | General | Dataviewer | Dataviewer x axis end is not there.
On ( 2600 days) longer plots it
is missing 8 moths and on (100 days) shorther |
|
|
11829
|
Mon Nov 30 18:27:30 2015 |
Koji | Update | LSC | strange behavior of ASDC | It wasn't fully mentioned in ELOG
11814.
We checked the PD first and this behavior |
|
|
11828
|
Mon Nov 30 17:17:30 2015 |
yutaro | Update | LSC | Does a baffle in front of ETMY have effect on loss map measurement? | With captured images of ETMYF, I measured
the shift of the beam spot on ETMY.
The conclusions are: |
|
|
11827
|
Mon Nov 30 16:33:06 2015 |
ericq | Update | LSC | strange behavior of ASDC | One possible explanation of this behavior is
simply poor centering of the AS beam
on AS55 (whose DC level provides ASDC, if |
|
|
11826
|
Mon Nov 30 15:17:57 2015 |
Koji | Update | LSC | LO level check for the LSC RF distribution box | T1000461
tells us that the nominal LO input is 2dBm
although we don't know what's the |
|
|
11825
|
Mon Nov 30 14:12:14 2015 |
ericq | Update | LSC | LO level check for the LSC RF distribution box | I checked the RF levels at the LSC LO distribution
box, with the agilent scope and a handful
of couplers. This was all done with the Marconi |
|
|
11824
|
Mon Nov 30 12:19:38 2015 |
yutaro | Update | Computer Scripts / Programs | image capture | On VIDEO.adl, Image Capture and Video Capture
did not seem to work and gave me some errors,
so I fixed following two things: |
|
|
11823
|
Mon Nov 30 10:41:45 2015 |
yutaro | Update | LSC | Does a baffle in front of ETMY have effect on loss map measurement? | It might have, so I think
I need to estimate shift of beam spot
more preciely. |
|
|
11822
|
Sun Nov 29 12:32:26 2015 |
Koji | Update | LSC | Current state of the frequency source, and possible improvement | I'm not claiming we need to modify
the frequency source immediately as we are
not limited by the oscillator amplitude or |
|
|
11821
|
Sun Nov 29 05:23:57 2015 |
rana | Update | LSC | Current state of the frequency source, and possible improvement | I need some more hints to understand the
improvement, although its generally good
to re-build it considering the sad state |
|
|
11820
|
Sat Nov 28 11:46:40 2015 |
yutaro | Update | LSC | possible error source of loss map measurement | I found that TRY level degraded and the
beam shape seen with CCD camera at AS port
was splitted when the beam spot on ETMY was |
|
|
11819
|
Fri Nov 27 22:20:24 2015 |
yutaro | Update | LSC | round trip loss of Y arm | Here, I upload data I took last night,
including the power of reflected power (locked/misaligned)
and transmitted power for each point (attachement |
|
|
11818
|
Fri Nov 27 03:38:23 2015 |
yutaro | Summary | LSC | round trip loss of Y arm | Tonight I measured "loss map"
of ETMY. The method to calculate round trip
loss is same as written in elog |
|
|
11817
|
Thu Nov 26 19:39:27 2015 |
Koji | Update | LSC | Current state of the frequency source, and possible improvement | Uploaded on T1000461
too. |
|
|
11816
|
Wed Nov 25 23:34:52 2015 |
yutaro | Update | LSC | round trip loss of Y arm | [yutaro, Koji]
Due to the strange behavior (elog |
|
|
11815
|
Wed Nov 25 23:17:34 2015 |
yutaro | Update | LSC | strange behavior of ASDC | [yutaro, Koji]
I noticed that ASDC level changes
depending on the angle of ITMY when trying |
|
|
11814
|
Wed Nov 25 22:59:42 2015 |
yutaro | Update | LSC | AS table optics realignment | I slightly changed the orientation
of a few mirrors on AS table that
are used to make the AS light get into PDs, |
|
|
11813
|
Wed Nov 25 22:37:12 2015 |
yutaro | Update | LSC | removal of Gautam's cable in 1Y2 and restoration of POYDC | [yutaro, Koji]
We disconnected the cable that
was connected to CH5 of the whitening filter in |
|
|
11812
|
Wed Nov 25 20:07:35 2015 |
rana | Update | IOO | LO level check for the IMC demod board | Perhaps we can replace T1 with a mini-circuits
hybrid 0-90 deg splitter and then remove
the trim caps. (JSPQ-80, JYPQ-30, SCPQ-50) |
|
|
11811
|
Wed Nov 25 16:46:10 2015 |
Koji | Update | IOO | LO level check for the IMC demod board | Awwww. I found that the demod board has
the power splitter (PSCJ-2-1) with one output
unterminated. |
|
|
11810
|
Wed Nov 25 16:40:32 2015 |
yutaro | Update | LSC | round trip loss of Y arm | I measured round trip loss of Y arm. The
alignment of relevant mirrors was set ideal
with dithering (no offset). |
|
|
11809
|
Wed Nov 25 14:46:53 2015 |
gautam | Update | CDS | c1lsc models restarted | I noticed that all the models running
on C1LSC had crashed when I came in earlier
today. I restarted all of them by ssh-ing |
|
|
11808
|
Wed Nov 25 10:07:10 2015 |
Koji | Update | IOO | LO level check for the IMC demod board | I didn't finish making the DCC entry
for this module yet.
But the attenuators are |
|
|
11807
|
Wed Nov 25 04:24:21 2015 |
rana | Update | IOO | LO level check for the IMC demod board | Hmmm. Very non-standard demod. From the
photo, looks like someone did some surgery
with the attenuators (AT1, AT2, AT3) in the |
|
|
11806
|
Tue Nov 24 14:58:40 2015 |
yutaro | Update | LSC | ITMX misaligned | I misaligned ITMX. The oplev servo for
ITMX is now turned off. You can restore ITMX
alignment by running "restore". |
|
|
11805
|
Tue Nov 24 11:18:47 2015 |
yutaro | Update | Optical Levers | Beam centering for the oplev of ITMY | I made the beam spot |
|
|
11804
|
Tue Nov 24 01:14:23 2015 |
Koji | Update | LSC | ALSY recovered | Sorry, I completely forgot to turn the
Marconi on... |
|
|
11803
|
Mon Nov 23 23:42:56 2015 |
ericq | Update | LSC | ALSY recovered | [ericq, gautam]
Gautam couldn't observe a Y
green beatnote earlier, so we checked |
|
|
11802
|
Mon Nov 23 22:12:10 2015 |
Koji | Update | IOO | LO level check for the IMC demod board | In order to check the proper LO level,
the IMC demod board was checked. As
a short summary, -8dBm is the proper input |
|
|
11801
|
Mon Nov 23 21:48:49 2015 |
Koji | Update | LSC | Frequency source fixed, IMC LO level adjusted | The trouble we had: the 29.5 MHz
source had an output of 6 dBm instead
of 13 dBm. |
|
|
11800
|
Mon Nov 23 20:32:43 2015 |
Koji | Update | LSC | Frequency source fixed, IMC LO level adjusted | The frequency source was fixed. The IMC
LO level was adjusted.
IMC is locked => OLTF measured |
|
|
11799
|
Mon Nov 23 14:45:39 2015 |
ericq | Update | Computer Scripts / Programs | New software | COMSOL 5.1 has been installed at: /cvs/cds/caltech/apps/linux64/comsol51/bin/comsol
MATLAB 2015b has been installed |
|
|
11798
|
Sun Nov 22 12:12:17 2015 |
Koji | Update | IOO | IMC OLTF | Well. I thought a bit more and now I think
it is likely that this is just the servo
bump as you can see in the closed-loop TF. |
|
|
11797
|
Sun Nov 22 12:07:09 2015 |
Koji | Update | IOO | IMC fix | TO DO
Done (Nov 23, 2015) -
Check if the attenuator is still there in |
|
|
11796
|
Sun Nov 22 07:09:01 2015 |
rana | Update | IOO | IMC fix | On the demod board there is a 10 dB attenuator
(AT1), which lowers the level to -10 dBm
before the ERA-5. Then it should be 10 dBm |
|
|
11795
|
Sat Nov 21 00:46:33 2015 |
Koji | Update | IOO | IMC OLTF | Here is the comparison before and after
the fix.
Before the work, the UGF was ~40kHz. |
|
|
11794
|
Sat Nov 21 00:45:30 2015 |
Koji | Update | IOO | IMC fix | Based on the observation of the PMC error
signal, I started measuring the IMC OLTF.
Immediately, it |
|
|
11793
|
Fri Nov 20 15:44:12 2015 |
Koji | Summary | PSL | Added 17.5kHz LPF to the PMC servo | As a final tune of the PMC servo, I've
added 1nF cap at the error signal amplification
stage. The diagram has been updated and uploaded |
|