| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
293
|
Fri Feb 1 17:17:05 2008 |
John | Summary | PSL | Mach-Zender tweaking | I helped Rob adjust the alignment of the Mach-Zender
to try and reduce any AM on the laser light.
Our goal was to reduce the large offsets |
|
|
294
|
Sat Feb 2 14:11:27 2008 |
John | Summary | Computers | OPTLEVmaster screen | I changed the layout of the optlev master
screen. The old version is /cvs/cds/caltech/medm/old/C1ASC_OPTLEVmaster080202.adl |
|
|
296
|
Mon Feb 4 22:01:57 2008 |
John | Summary | LSC | Fibres auxiliary locking - Fibers | I managed to couple ~75% of the light transmitted
from the y arm, through the fibre, back to
the SP table. I hoped that this would be |
|
|
304
|
Sat Feb 9 13:05:48 2008 |
John | Summary | IOO | PMC camera/ HEPA | I replaced the Gig-E camera on the PMC trans
beam. The PZT was close to railing and I
wanted to adjust it. I just did a quick job, |
|
|
305
|
Sat Feb 9 13:32:07 2008 |
John | Summary | SUS | All watchdogs tripped | When I arrived this afternoon the watchdogs
had tripped on all optics. I reset them and
enabled the coil currents.
|
|
|
315
|
Wed Feb 13 20:37:11 2008 |
John | Update | LSC | Fibre locking - Fiber | Sam and I observed fringes in the light reflected
from the Y arm. These fringes are due to
the sidebands and not the carrier. To improve |
|
|
324
|
Tue Feb 19 18:28:41 2008 |
John | Update | PEM | More seismic in Baja California | Steve spotted more activity from the same
quake.
|
|
|
328
|
Thu Feb 21 18:29:28 2008 |
John | Summary | General | HP Network Analyser Analyzer | The HP 4195A network analyser may be broken,
measurements below 150MHz are not reliable.
Above 150MHz everything looks normal. This |
|
|
342
|
Wed Feb 27 22:05:03 2008 |
John | Update | LSC | Auxiliary locking | A summary of the status of the auxiliary arm
locking effort.
|
|
|
348
|
Fri Feb 29 13:51:17 2008 |
John | Summary | LSC | PD6 response | I checked the response of PD6 using the AM
laser. It looks happy enough.[IMG]elog:348/1[/IMG]
|
|
|
359
|
Wed Mar 5 12:35:09 2008 |
John | Summary | Computer Scripts / Programs | Plot photodiode responses in MatLab | A matlab function to plot the responses of
photodiodes. There's still plenty of room
for improvement but it should work for all |
|
|
360
|
Wed Mar 5 12:51:48 2008 |
John | Summary | LSC | Initial Ligo Arm finesse versus lambda | I've taken the coating recipes for the initial
ligo arm cavity from Rana's web page (ligo.caltech/edu/~rana/mat/)
and plotted the finesse as a function of |
|
|
367
|
Mon Mar 10 20:46:41 2008 |
John | Configuration | LSC | ETMY Trans PD & QPD | I've placed a 10% reflector in the path from
ETMY to the trans and quadrant photodiodes. |
|
|
377
|
Thu Mar 13 18:20:29 2008 |
John | Update | General | New Focus 4003 EOM 29.489MHz | I measured the modulation index as a function
of drive power using an OSA. Agrees well
with spec of 0.2 rad/V.
|
|
|
396
|
Sun Mar 23 00:56:42 2008 |
John | Update | LSC | More on 3f | We ended our last attempt at 3f locking concerned
about the beam size on PD6. I investigated
tonight. The beam was not obviously overfilling |
|
|
399
|
Mon Mar 24 20:15:03 2008 |
John | Summary | Computers | c1susvme2 | c1susvme2 isn't behaving itself. It keeps
getting out of sync and/or giving a red status
light.
|
|
|
402
|
Tue Mar 25 15:56:09 2008 |
John | Update | Treasure | Assorted pictures | Some pictures scavenged from the D40. |
|
|
405
|
Wed Mar 26 22:26:15 2008 |
John | Update | Computers | c1susvme | I removed the fan and tweaked the timing cables
to see if they were the source of our problems.
I saw no effect. I'm leaving the fan off |
|
|
503
|
Thu May 29 15:58:44 2008 |
John | Summary | IOO | MC realignment | I repeatedly adjusted the yaw of the upper
mirror on the input periscope and re aligned
the MC. With the PRM aligned I tried to optimise |
|
|
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 |
|
|
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 |
|
|
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.
|
|
|
568
|
Wed Jun 25 13:56:56 2008 |
John | Summary | Locking | Tuesday night locking | Rob, John
Worked to try and reduce the CARM offset |
|
|
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 |
|
|
582
|
Fri Jun 27 14:36:39 2008 |
John | Summary | Locking | | Rob, Yoichi, John
Some progress last night:
|
|
|
586
|
Fri Jun 27 19:59:44 2008 |
John | Update | Computers | c1iovme | C1susvme2 and C1iovme crashed which sent the
optics swinging and tripped the watchdogs.
|
|
|
588
|
Sat Jun 28 14:56:44 2008 |
John | Update | Computers | ini files | In short, I was editing the ini files yesterday
evening, I didn't e-log it and after some
investigation this afternoon it apears
|
|
|
589
|
Sat Jun 28 23:23:50 2008 |
John | Update | Computers | Rebooting | All of the computers are now showing green
lights.
|
|
|
591
|
Sun Jun 29 11:31:52 2008 |
John | Summary | PSL | ISS | I reduced the gain of the ISS (C1: PSL-ISS_VGAGAIN)
from 5dB to 2dB. Any higher and it constantly
saturates. |
|
|
595
|
Sun Jun 29 19:53:26 2008 |
John | Summary | PSL | ISS | [quote]I reduced the gain of the ISS (C1:
PSL-ISS_VGAGAIN) from 5dB to 2dB. Any higher
and it constantly saturates.[/quote]
|
|
|
596
|
Sun Jun 29 20:09:40 2008 |
John | Summary | IOO | mcup and mcdown indicators | I edited the mcup and mcdown scripts so that
C1IFO_STATE shows when these scripts are
running.
|
|
|
598
|
Mon Jun 30 01:49:06 2008 |
John | Update | IOO | MC work | I'm in the process of aligning the mode cleaner/
input beam.
|
|
|
601
|
Mon Jun 30 09:46:15 2008 |
John | Update | IOO | MC WFS | MC WFS are on. They seem to do some good during
the day. |
|
|
604
|
Mon Jun 30 15:08:52 2008 |
John | Summary | PSL | MZ alignment | I adjusted the alignmnet of the Mach-Zehnder's
two North mirrors (downstream of the EOMs).
|
|
|
613
|
Tue Jul 1 12:51:34 2008 |
John | Summary | General | IFO alignment | Rana, Rob, Yoichi, John
The recent computer problems and MZ work |
|
|
618
|
Tue Jul 1 21:45:48 2008 |
John | Update | PSL | Mach Zehnder script and screen | I've edited C1: PSL_MACH_ZEHNDER.adl and /cvs/cds/caltech/scripts/PSL/MZ/lockMZ
to reflect the changes described in entry
#616. |
|
|
625
|
Wed Jul 2 17:19:03 2008 |
John | Summary | Computers | op440m - shutdown and restarted | After 160days op440m was getting a little
slow. |
|
|
626
|
Wed Jul 2 18:30:01 2008 |
John | Update | IOO | QPD alignment | I aligned the beams on the following QPDs
IP POS
|
|
|
633
|
Thu Jul 3 16:57:23 2008 |
John | Summary | General | FSS_RMTEMP | The FSS room temp alarm has been beeping a
lot recently. I altered the FSS_RMTEMP alarm
levels using the
|
|
|
644
|
Tue Jul 8 00:14:28 2008 |
John | Summary | Computers | Alarm handler | Rob thought it would be nice to have some
alarms on the cpu loads and FE syncs.
I added all these channels to the alarm handler |
|
|
648
|
Tue Jul 8 12:25:54 2008 |
John | Summary | PSL | ISS gain set to 2dB | |
|
|
651
|
Wed Jul 9 12:42:14 2008 |
John | Update | Locking | Hand off to RF CARM | Rob, Yoichi, John
Last night we were able to reduce the CARM |
|
|
653
|
Wed Jul 9 17:58:19 2008 |
John | Summary | General | Illuminator alarms | This morning some time was wasted on alignment
due to the illuminators.
|
|
|
657
|
Thu Jul 10 23:27:57 2008 |
John | Metaphysics | Cameras | Secret handshakes | Rob and I have joined the ranks of the illuminati
and exercised our power.
|
|
|
664
|
Sun Jul 13 22:39:16 2008 |
John | Summary | General | Edited medm screens | I've edited the FSS and PMC screens so that
red boxes are shown around the appropriate
slider if a gain or offset is not within |
|
|
665
|
Mon Jul 14 00:36:19 2008 |
John | Summary | PSL | Slow sweep of laser temp - PMC PZT response | John, Rana
Follow up to # 663
|
|
|
667
|
Mon Jul 14 12:43:07 2008 |
John | Summary | Computers | Restarted fb40m, tpman and c1ass | |
|
|
675
|
Tue Jul 15 12:44:08 2008 |
John | Summary | Locking | DRFPMI with DC readout | Rob, John
Last night, despite suspect alignment, we |
|
|
684
|
Wed Jul 16 17:36:51 2008 |
John | DAQ | PSL | FSS input offset | I changed the nominal FSS input offset to
0 from 0.3. Tolerance remains unchanged at
+/-0.05. |
|
|
690
|
Thu Jul 17 13:08:37 2008 |
John | Summary | LSC | HOM resonances in the arms | On Tuesday night we attempted to lock the
full DRFPMI in the optical spring configuration
with the +f2 sideband resonant in the SRC.
|
|