| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
1037
|
Wed Oct 8 23:18:23 2008 |
Yoichi | Update | PSL | Correlation between the Sorensen switching noise and the FSS error signal | I took some spectra and coherence function
of the FSS error signal and the +24V Sorensen
power line.
|
|
|
1036
|
Wed Oct 8 22:23:43 2008 |
Yoichi | Configuration | Electronics | Electronics work bench cleanup | Yesterday, I cleaned up the electronics work
bench. I figured that keeping the work bench
in order has larger effect on the work efficiency |
|
|
1035
|
Wed Oct 8 21:26:20 2008 |
Yoichi | Update | PSL | Attempt to replace the DC-DC converter (aborted) | Rich, Steve, Yoichi
We opened the MOPA box and inspected our |
|
|
1034
|
Wed Oct 8 19:17:55 2008 |
Yoichi | Configuration | PSL | Laser power is slowly recovering | This afternoon we (rich, steve, yoichi) shutdown
the laser for the DC-DC converter installation.
|
|
|
1033
|
Wed Oct 8 12:35:56 2008 |
josephb | Configuration | Computers | New Network diagram for the 40m | Attached is a pdf of the new network diagram
for the 40m after having removed all of the
old hubs. |
|
|
1032
|
Tue Oct 7 21:19:40 2008 |
Yoichi | Update | IOO | MC_F calibrated spectrum | [COLOR=darkred]I updated the plots because
I did not take into account the double path
AOM effect, which doubles the frequency actuation |
|
|
1031
|
Tue Oct 7 12:17:57 2008 |
Alberto | Configuration | Computers | Time reset on MEDM | Yoichi, Alberto
I noticed the MEDM screen time was about |
|
|
1030
|
Tue Oct 7 10:49:29 2008 |
Alberto | Update | General | Displaced Photodiode | This morning I found that the photodidode
of the PLL in the PSL table was not aligned
to the beam anymore. The PD support was not |
|
|
1029
|
Mon Oct 6 16:41:33 2008 |
Alberto | DAQ | LSC | C1LSC in coma | [quote]Alberto, Joe,
The C1LSC medm screen is frozen and the C1LSC |
|
|
1028
|
Mon Oct 6 12:45:41 2008 |
Alberto | DAQ | LSC | C1LSC in coma | Alberto, Joe,
The C1LSC medm screen is frozen and the C1LSC |
|
|
1027
|
Mon Oct 6 10:00:49 2008 |
steve | Update | MOPA | MOPA_HTEMP is up | Monday morning conditions:
The laser head temp is up to 20.5 C
|
|
|
1026
|
Sat Oct 4 07:23:42 2008 |
Koji | Metaphysics | Environment | The Gatekeeper | Hi, this is Koji from Japan.
I am afraid that this is a poisonous spider, |
|
|
1025
|
Fri Oct 3 19:38:02 2008 |
rob | Metaphysics | Environment | The Gatekeeper |
Found this lady outside the door of the 40m
lab a few nights ago. |
|
|
1024
|
Fri Oct 3 15:57:05 2008 |
rob | Update | Locking | last night, again | Last night was basically a repeat of the night
before--marginally better locking with the
DRMI resonating the +f2
|
|
|
1023
|
Fri Oct 3 15:09:58 2008 |
rob | Update | PSL | FAST/SLOW |
Last night during locking, for no apparent
reason (no common mode), the PSL FAST/SLOW |
|
|
1022
|
Fri Oct 3 12:15:21 2008 |
Alberto | Configuration | IOO | C1iool0 rebooted | This morning, in order to update the threshold
values of the alarm handler for the StochMon,
I rebooted the C1iool0 computer following |
|
|
1021
|
Thu Oct 2 18:56:19 2008 |
rana | Summary | SUS | Resistivity of Suspension Wire | Bob and Steve measured the resistance of the
suspension wire today:
|
|
|
1020
|
Thu Oct 2 16:44:28 2008 |
steve | Summary | oplevs | optical levers | The idea is to push the UGF to 10 Hz of the
TM oplev servos with quiet HeNe laser.
We measured good intensity noise of JDS 1103P |
|
|
1019
|
Thu Oct 2 02:45:50 2008 |
rob | Update | Locking | marginally better | Locking the DRMI with the +f2 sideband was
marginally better tonight. I was able to
get it lock stably enough to take transfer
|
|
|
1018
|
Wed Oct 1 23:21:03 2008 |
Yoichi | Configuration | PSL | Reference cavity reflection camera | I re-centered the reference cavity reflection
camera, which has been mis-aligned for a
while.
|
|
|
1017
|
Wed Oct 1 23:05:14 2008 |
Yoichi | Update | PSL | ISS RIN spectra | Stefan, Yoichi
We took relative intensity noise (RIN) spectra |
|
|
1016
|
Wed Oct 1 12:09:25 2008 |
Alberto | Configuration | Computers | "StochMon" added to the Alarm Handler | [quote]John, Alberto,
we added the four channels of the RF Amplitude |
|
|
1015
|
Wed Oct 1 12:05:58 2008 |
Alberto | Configuration | Computers | "StochMon" added to the Alarm Handler | John, Alberto,
we added the four channels of the RF Amplitude |
|
|
1014
|
Wed Oct 1 02:54:03 2008 |
rob | Update | Locking | bad |
Tried the spring-y side tonight with a discouraging
lack of progress. There were several locks |
|
|
1013
|
Wed Oct 1 02:47:53 2008 |
rana | Update | PSL | PSL ERR & LODET: Too much offset | Looks like there is an anomolous mixer offset
correlated with the increase in the LO level.
This may be leading to crazy offset locking |
|
|
1012
|
Wed Oct 1 02:10:03 2008 |
rana | Update | IOO | MZ is going bad | Here's a 2 day trend of the MZ. You can see
that there is something bad with ERR - it
should really be going to zero.
|
|
|
1011
|
Wed Oct 1 00:24:54 2008 |
rana | Update | Locking | last night | I had mistakenly left the MC boost off during
my FAST investigations. The script is now
restored.
|
|
|
1010
|
Tue Sep 30 19:50:27 2008 |
Jenne | Update | PSL | Quicky Summary - more details later | Quicky summary for now, more details later
tonight / tomorrow morning:
|
|
|
1009
|
Tue Sep 30 13:43:43 2008 |
rob | Update | Locking | last night | Steady progress again in locking again last
night. Initial acquisition of DRMI+2ARMs
was working well.
|
|
|
1008
|
Mon Sep 29 17:53:33 2008 |
Yoichi | Update | PSL | ISS update | ISS has been saturating easily.
Today I opened the PSL enclosure to inspect
the ISS box. Then I found that the sensor |
|
|
1007
|
Mon Sep 29 15:09:36 2008 |
steve | Update | PSL | almost 4 yrs plot of power & temps | The water chiller is normally running 1.5
C warmer than the laser head temp.
When control room temp is stable and PEM-count_temp |
|
|
1006
|
Mon Sep 29 13:33:39 2008 |
josephb | Configuration | Computers | Gigabit network finished and conlog available on Nodus | The last 100 Mb unmounted hub has been removed
(or at least of the ones I could find).
We should be on a fully gigabit network with |
|
|
1005
|
Mon Sep 29 13:23:40 2008 |
rob | Summary | PSL | Laser chiller running a little hot | [quote]I looked at it some last night and
my suspicion was the ISS. Whenever the ISS
switch came on the FAST got a kick.
|
|
|
1004
|
Mon Sep 29 11:17:14 2008 |
steve | Update | SAFETY | horizontal viewports are protected with lexan | The four horizontal viewports of arms are
protected
by 3/8" thick, 8.5" OD Lexan disk of MR10 |
|
|
1003
|
Mon Sep 29 01:19:40 2008 |
rana | Summary | PSL | Laser chiller running a little hot | I looked at it some last night and my suspicion
was the ISS. Whenever the ISS switch came
on the FAST got a kick.
|
|
|
1002
|
Fri Sep 26 19:18:39 2008 |
Jenne | Update | IOO | MC2 is having a bad day | As Steve mentioned earlier in today's elog,
MC2 keeps ringing up for no clear reason.
It is definitely only MC2 that is ringing |
|
|
1001
|
Fri Sep 26 19:08:43 2008 |
rana | Configuration | PSL | Refcav Trans: PD + Camera + Dumps | I went out to improve the Refcav trans path.
I removed all ND filters to get rid of the |
|
|
1000
|
Fri Sep 26 18:35:17 2008 |
Jenne | Update | PSL | PMC filter is out for tuning | The PMC's new Pomona Box filter is out for
tuning. I'd like to get the notch right
on the 18.3kHz, rather than being off in |
|
|
999
|
Fri Sep 26 16:13:57 2008 |
rana | Update | IOO | MC_L / MC_F crossover | We were trying to understand why the FAST_F
signal had such large excursions (~1V ~ 5
MHz).
|
|
|
998
|
Fri Sep 26 16:08:39 2008 |
rob | Update | Locking | some progress | There's been good progress in locking the
last couple of nights. A lot of time was
wasted before I found that
|
|
|
997
|
Fri Sep 26 14:10:21 2008 |
Yoichi | Configuration | Computers | Lab laptops maintenance | The linux laptops were unable to write to
the NFS mounted directories.
That was because the UID of the controls |
|
|
996
|
Fri Sep 26 09:05:47 2008 |
steve | Update | SUS | MC2 damping restored | The MC2 sus damping was restored. |
|
|
995
|
Fri Sep 26 00:19:54 2008 |
Jenne | Update | PSL | Filter-action with the PMC | Written, but not posted on 24Sept2008:
|
|
|
994
|
Thu Sep 25 17:14:31 2008 |
rana | Configuration | General | new sitemap | |
|
|
993
|
Thu Sep 25 15:24:05 2008 |
Yoichi | Update | IOO | MC_F VCO calibration | I calibrated the VCO driving the AOM for the
AO path of the MC feedback.
|
|
|
992
|
Thu Sep 25 14:03:08 2008 |
josephb | Configuration | Computers | | [quote]
We (Joe) need to buy a GigE card for linux1
and to also set up conlog and conlogger to |
|
|
991
|
Thu Sep 25 10:48:29 2008 |
Yoichi | Update | PSL | FSS calibration again | I did a calibration of the FSS error signal
again with a different method.
This time, I swept the laser frequency with |
|
|
990
|
Thu Sep 25 03:12:13 2008 |
rana | Summary | Computers | conlog and linux1 | It would be nice to have conlog from outside.
Right now its on linux1 and so its unavailable.
To
|
|
|
989
|
Thu Sep 25 02:35:21 2008 |
rana | Summary | PSL | FAST is moving alot | It looks like the FAST signal has started
moving a lot - this is partly what inspired
us to tune the SLOW loop.
|
|
|
988
|
Wed Sep 24 19:13:06 2008 |
rana | Configuration | Computer Scripts / Programs | updatedb & locate: megatron & rosalba | I ran [I]updatedb[/I] as root today on megatron
and rosalba just before the meeting.
It finished at ~14:10 on both machines so |
|