| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
577
|
Thu Jun 26 18:29:44 2008 |
Jenne | Update | | MC Back online | Jenne, Rob, Yoichi
I was playing with the Mode Cleaner earlier |
|
|
576
|
Thu Jun 26 18:27:04 2008 |
rana | Update | Computer Scripts / Programs | No Dataviewer No Cry | Dataviewer was hanging. It would open the
Grace window but then not plot anything.
Since DTT was working
|
|
|
575
|
Thu Jun 26 18:24:28 2008 |
Yoichi | Update | PSL | FSS input ofset slider problem - fixed | I checked the FSS servo interface board and
found that a LT1125CSW used to differentialize
offset channel was broken (no virtual short).
|
|
|
574
|
Thu Jun 26 14:06:00 2008 |
Masha | Update | General | 500mW INNOLIGHT NPRO info | Below is the placement of 500mW INNOLIGHT
NPRO mephisto laser. It is set up on the
Symmetric Port table. [IMG]elog:574/1[/IMG] |
|
|
573
|
Thu Jun 26 12:30:40 2008 |
John | Summary | Locking | CARM on REFL_DC | [COLOR=blue]Idea:[/COLOR]
Try REFL_DC as the error signal for CARM |
|
|
572
|
Thu Jun 26 10:56:15 2008 |
Max Jones | Update | PEM | Removed Magnetometer | I removed the Bartington Magnetometer on the
x arm to one of the outside benches. I'll
be trying to determine if and how it works |
|
|
571
|
Thu Jun 26 01:10:18 2008 |
rana | Update | PEM | Alarm Handler indicates that dust level is high | [I]In its first useful act[/I], the Alarm
Handler started beeping indicating that the
[COLOR=purple]dust particle
|
|
|
570
|
Thu Jun 26 01:08:22 2008 |
rana | Configuration | General | Alarm Handler Revived | I have revived the Alarm Handler by turning
it on on op540m and adjusting the levels
of
|
|
|
569
|
Wed Jun 25 18:03:21 2008 |
Yoichi | Configuration | PSL | FSS Input Offset slider problem | While working on the PMC scanning, I noticed
that the FSS input offset slider is doing
nothing.
|
|
|
568
|
Wed Jun 25 13:56:56 2008 |
John | Summary | Locking | Tuesday night locking | Rob, John
Worked to try and reduce the CARM offset |
|
|
567
|
Wed Jun 25 13:38:22 2008 |
Koji | Update | General | Abs. Len. Meas. ~ Placement of the 700mW NPRO on the AP table | This morning I have put the 700mW NPRO on
the AP table for the abs length measurement.
|
|
|
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 |
|
|
565
|
Wed Jun 25 11:36:14 2008 |
Max Jones | Update | Computer Scripts / Programs | First Week Update | For the first week I have been modifying the
noise budget script in caltech/NB to run
with 40 m parameters and data. As per Rana's |
|
|
564
|
Wed Jun 25 11:01:45 2008 |
Masha | Update | Auxiliary locking | fiber stabilization | For the first week, I have been learning about
fiber noise cancellation, auxiliary locking
techniques, and other relevant helpful topics |
|
|
563
|
Wed Jun 25 09:46:45 2008 |
Sharon | Update | | Adaptive Filters | I have been learning about different methods
for applying adaptive filters to improve
the Mode Cleaner lock in specific, and other |
|
|
562
|
Wed Jun 25 01:30:19 2008 |
John | Summary | IOO | Frequency noise after the MC | I made some (very) rough estimates of the
contribution made to the noise after the
mode cleaner by three sources.
|
|
|
561
|
Wed Jun 25 00:35:40 2008 |
Koji | Summary | General | Optical Layout on the AP table | I have visited the AP table in order to investigate
where we are going to put the optical setup
for the abs. length meas.
|
|
|
560
|
Tue Jun 24 22:43:23 2008 |
rana | Summary | SEI | Stack TF | |
|
|
559
|
Tue Jun 24 22:31:10 2008 |
Masha | Update | Auxiliary locking | my first step in fiber stabilization | There is a new 1W INNOLIGHT NPRO laser at
the Symmetric Port.
|
|
|
558
|
Tue Jun 24 17:12:10 2008 |
josephb, Eric | Configuration | Cameras | GC750 setup, 1X4 Hub connected, ETMX images | The GC750 camera has been setup to look at
ETMX. In addition, the new 1X4 rack mounted
switch (131.215.113.200) has been connected |
|
|
557
|
Tue Jun 24 15:15:09 2008 |
John | Summary | LSC | Locking efforts | Rob, Rana, John
In the past week or so we've been working |
|
|
556
|
Tue Jun 24 10:24:43 2008 |
Koji | Update | General | Abs. Len. Meas. ~ Cavity Swing Measurement (2) | At the entry 555, Alberto reported the results
of the cavity length measurement using cavity
sweeping.
|
|
|
555
|
Mon Jun 23 21:51:19 2008 |
Alberto | Update | General | Arm Cavity Length Measurement | We measured the arm cavity lengths sweeping
the ETM mirror position and looking at the
reflected demodulated output. We excited |
|
|
554
|
Mon Jun 23 19:48:28 2008 |
rana,alberto | Summary | IOO | StochMon trends (80 days) | Here's a StochMon plot showing the RFAM after
the MC. Remember that in these units, 2V
means no RFAM
|
|
|
553
|
Mon Jun 23 19:33:01 2008 |
rana, jenne | Update | IOO | MC_F Noise check | We looked at the MC_F spectrum because Rob
and Yoichi said that it had gone 'all crazy'.
It
|
|
|
552
|
Mon Jun 23 15:22:04 2008 |
rana | Bureaucracy | SAFETY | Laser Safety Walkthrough today | |
|
|
551
|
Sun Jun 22 21:38:49 2008 |
rob | HowTo | General | IFO CONFIGURE |
Now that we're getting back into locking,
it's nice to have a stable alignment of the |
|
|
550
|
Fri Jun 20 17:42:48 2008 |
steve | Update | PSL | SS trap scattering compared to black glass trap | Circular SS304 trap was compared to wedged
black glass trap.
|
|
|
549
|
Fri Jun 20 08:30:27 2008 |
stiv | Update | Photos | 40m summer line up 2008 | atm1: John, Alberto, Yoichi, Koji, Masha,
and Sharon
|
|
|
548
|
Fri Jun 20 02:20:33 2008 |
Yoichi | Update | | PMC transmittance degradation | The PMC transmitted light power has been degrading
constantly for last two weeks (see the attachment
1).
|
|
|
547
|
Fri Jun 20 01:38:55 2008 |
rana | Update | PEM | 20 day Weather | Yoichi showed me that its possible to make
PNG images from PS using GS:
|
|
|
546
|
Thu Jun 19 20:22:03 2008 |
rana | Update | General | FE Computer Status | I called Rolf (@LLO) who called Alex (@MIT)
who suggested that we power cycle every crate
|
|
|
545
|
Thu Jun 19 15:52:06 2008 |
Alberto | Configuration | Computers | Measure of the current absorbed by the new Megatron Computer | Together with Rich Abbot, sam Abbot and I
measured the current absorbed by the new
Megatron computer that we installed yesterday |
|
|
544
|
Wed Jun 18 18:50:09 2008 |
rana | Update | Computers | It can only be attributable to human error. (HAL - 2001) | [B]There has been another one of "those" events
and all of the front end machines are down.[/B]
|
|
|
542
|
Wed Jun 18 18:32:09 2008 |
Max Jones | Update | Computer Scripts / Programs | NB Update | I am reconfiguring the the noisebudget code
currently in use at the sights. To that end,
I have done the following things (in addition |
|
|
541
|
Wed Jun 18 18:26:19 2008 |
Yoichi | Update | PSL | Finding the optimal operation temperature for the NPRO by the slow act scan | Being suspicious of the temperature stabilization
of the NPRO crystal, I ran the slow scan
script written by Rana to find the suitable |
|
|
540
|
Wed Jun 18 18:20:10 2008 |
Yoichi | Update | PSL | Investigation on the NPRO temperature stabilization glitches | As Rob pointed out in http://dziban.ligo.caltech.edu:40/40m/537
the MOPA NPRO has been showing some glitchiness
in the LTEC loop.
|
|
|
539
|
Wed Jun 18 16:37:54 2008 |
steve,rana | Update | SAFETY | CO2 test in the east arm | The CO2 laser and table are in the east arm
for characterization of the mechanics. We
will not be operating it until we have an |
|
|
538
|
Wed Jun 18 16:07:57 2008 |
rob | Summary | Computers | RFM network down |
The RFM network tripped off around noon today.
It's still down. The problem appears to |
|
|
537
|
Wed Jun 18 00:19:29 2008 |
rob | Update | PSL | MOPA trend | 15 day trend of MOPA channels. The NPRO temperature
fluctations are real, and causing the PMC
to consistently run up against its rails. |
|
|
536
|
Tue Jun 17 22:00:53 2008 |
John | HowTo | PSL | Problems turning MZ servo on/off | We were unable to toggle the MZ servo on/off
(Blank/Normal) from MEDM. Pushing on the
Xycom board and cables changed the fault |
|
|
535
|
Mon Jun 16 18:26:01 2008 |
Max Jones | Update | Computer Scripts / Programs | Noise Budget Changes | In the directory cvs/cds/caltech/NB the following
changes were made:
|
|
|
534
|
Fri Jun 13 11:17:25 2008 |
Yoichi | Update | PSL | PMC transmittance at high power | We received a new cable for the Scientech
calorimeter. So I measured the transmittance
of the PMC at higher power.
|
|
|
533
|
Thu Jun 12 15:55:15 2008 |
rob | Update | Locking | report | [quote]Rob: Awesome figure. As you can imagine,
I have lots of questions, and hope that you
will consider this figure to be the beginning, |
|
|
532
|
Thu Jun 12 15:09:33 2008 |
alan | Update | Locking | report | Rob: Awesome figure. As you can imagine, I
have lots of questions, and hope that you
will consider this figure to be the beginning, |
|
|
531
|
Thu Jun 12 01:51:23 2008 |
rob | Update | Locking | report | [I]rob, john[/I]
We've been working (nights) on getting the |
|
|
530
|
Wed Jun 11 15:30:55 2008 |
josephb | Configuration | Cameras | GC1280 | The trial use GC1280 has arrived. This is
a higher resolution CMOS camera (similar
to the GC750). Other than higher resolution, |
|
|
529
|
Wed Jun 11 11:45:25 2008 |
steve | Update | PSL | ss trap works | The trap works well at 3 W level. No back
reflected beam coming out of the trap on
low power
|
|
|
528
|
Tue Jun 10 08:37:18 2008 |
steve | Update | PSL | beam trap is being tested | High power beam trap is being tested just
west of FSS area on psl enclosure.
|
|
|
527
|
Mon Jun 9 17:57:59 2008 |
Yoichi | Configuration | PSL | PMC input power backed to the original | I rotated back the HWP before the PBS to restore
the input laser power to the PMC.
Now the reading of PSL-PMC_PMCTRANSPD is |
|