ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
638
|
Mon Jul 7 13:06:38 2008 |
Koji | Update | General | Beats of the two lasers in the absolute length measurement observed | One may need an RF filter after the mixer.
I expect the SR560 does work for this purpose.
If it does not, a passive LPF can be used.
|
|
|
637
|
Mon Jul 7 11:22:02 2008 |
Alberto | Update | General | Beats of the two lasers in the absolute length measurement observed | I didn't post a screenshot from the RF SA
because I had troubles with the interface
with the computer (unfortunately the network |
|
|
636
|
Sun Jul 6 16:17:40 2008 |
tobin | HowTo | Computers | SVN | I was able to check out the 40m SVN here in
Livingston using this command:
|
|
|
635
|
Thu Jul 3 22:54:45 2008 |
Koji | Update | General | Beats of the two lasers in the absolute length measurement observed | Great! Conguraturation! I wish if I could
see it! It's nice if you can put the photo
or anything of the RF spectrum analyzer.
|
|
|
634
|
Thu Jul 3 18:48:09 2008 |
Alberto | Update | General | Beats of the two lasers in the absolute length measurement observed | I adjusted the alignment of the flipper mirror
as suggested by Koji making the two beam
spots match. I also aligned all the IFO mirrors |
|
|
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
|
|
|
632
|
Thu Jul 3 16:18:51 2008 |
rob | Summary | Locking | specgrams | I used ligoDV to make some spectrograms of
DARM_ERR (1), QPDX (2), and QPDY (3). These
show the massive instability from 30-40Hz |
|
|
631
|
Thu Jul 3 13:54:26 2008 |
rob | Configuration | Computers | mDV on rosalba |
Does mDV work on rosalba? It can't find
[B][FONT=Courier New]NDS_GetChannels[/FONT][/B]. |
|
|
630
|
Thu Jul 3 13:12:32 2008 |
Rob, Yoichi, John | Update | Locking | More oscillations | Bounce/ roll filters were added to the short
degrees of freedom to reduce the effect of
the 24Hz line seen on Tuesday night.
|
|
|
629
|
Thu Jul 3 12:36:05 2008 |
Jonh | Summary | SUS | ETMY watchdog | ETMY watchdog was tripped. I turned it off
and re-enabled the outputs. |
|
|
628
|
Thu Jul 3 11:53:30 2008 |
Koji | Update | General | Status of the alignment of the NPRO beam for the Absolute Length Measurement | The method itself looked fine.
Use of the one arm configuration will make |
|
|
627
|
Wed Jul 2 19:15:52 2008 |
Alberto | Update | General | Status of the alignment of the NPRO beam for the Absolute Length Measurement | Today I've tried to bring the frequency of
the NPRO laser close enough to that of the
IFO beam so that the beat between the two |
|
|
626
|
Wed Jul 2 18:30:01 2008 |
John | Update | IOO | QPD alignment | I aligned the beams on the following QPDs
IP POS
|
|
|
625
|
Wed Jul 2 17:19:03 2008 |
John | Summary | Computers | op440m - shutdown and restarted | After 160days op440m was getting a little
slow. |
|
|
624
|
Wed Jul 2 15:14:42 2008 |
steve | Update | General | added beam traps | I placed baked razor beam trap after INJ_SM1
and flipper in the injection path on the
AP table
|
|
|
623
|
Wed Jul 2 13:56:10 2008 |
Rob, Yoichi, John | Update | Locking | 24.5 Hz resonance | Work continues on trying to reduce the CARM
offset using dc signals from PO_DC. Got up
to arm powers of
|
|
|
622
|
Wed Jul 2 10:35:02 2008 |
Eric | Summary | Cameras | General Summary | I finished up the 2D Gaussian fitting code,
and, along with Joe, integrated into the
Snap software so that it automatically does |
|
|
621
|
Wed Jul 2 06:46:05 2008 |
Alberto | Configuration | General | NPRO on to warm up | This morning I turned on the NPRO on the AP
table so that it can warm up for a few hours
before I start using it today.
|
|
|
620
|
Wed Jul 2 00:59:13 2008 |
Masha | Update | Auxiliary locking | balanced detection, noise plots, progress | Progress report submitted today(!). It is
on the 40m wiki page. Below is a figure of
some estimated noise sources.
|
|
|
619
|
Tue Jul 1 21:54:05 2008 |
Koji | Update | General | Re: Abs. Length Meas. setup | I tried to look for the beating in the signal
from the PD but I couldn't find. I had the
temperature of the laser initially set to |
|
|
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. |
|
|
617
|
Tue Jul 1 21:27:27 2008 |
rob | HowTo | Computer Scripts / Programs | slider twiddling after reboot |
Sometimes after we reboot the front-end machines,
some of the hardware gets stuck in an unknown |
|
|
616
|
Tue Jul 1 16:48:42 2008 |
rob, john | Configuration | PSL | MZ servo switch problem resolved forever | [quote]C1:PSL-MZ_BLANK switch (to turn on/off
the servo) is not working again. The switch
is always off regardless of the epics state.
|
|
|
615
|
Tue Jul 1 14:24:58 2008 |
rob | HowTo | Computer Scripts / Programs | conlog time machine |
I've written a perl script (now in the $SCRIPTS/general
directory) which implements a "conlog restore" |
|
|
614
|
Tue Jul 1 13:34:29 2008 |
rob | Update | Computers | RFM network back | [quote]
For some reason, the computers requiring
startup.cmd (like c1lsc) halt after running |
|
|
613
|
Tue Jul 1 12:51:34 2008 |
John | Summary | General | IFO alignment | Rana, Rob, Yoichi, John
The recent computer problems and MZ work |
|
|
612
|
Tue Jul 1 12:08:38 2008 |
John, Joe | Configuration | PSL | PMC input PD | Joe and I switched cables so that the PMCR
screen actually shows reflection not transmission.
|
|
|
611
|
Tue Jul 1 11:57:24 2008 |
Yoichi | Configuration | PSL | MZ servo switch problem again | C1:PSL-MZ_BLANK switch (to turn on/off the
servo) is not working again. The switch is
always off regardless of the epics state.
|
|
|
610
|
Tue Jul 1 11:53:38 2008 |
Yoichi | Update | Computers | RFM network back | I took a tour of the FE machines and power
cycled all of them.
After executing the software restart procedures |
|
|
609
|
Tue Jul 1 10:15:22 2008 |
steve | Update | PSL | eventfull two days | The laser recovered from a short temp rise.
The MZ was aligned and realigned. The suspentions
were kicked up accidentally.
|
|
|
608
|
Tue Jul 1 09:26:33 2008 |
steve | Update | Computers | RFM network is down | |
|
|
607
|
Mon Jun 30 18:36:01 2008 |
Yoichi | Update | PSL | MZ alignment again | John, Yoichi
We re-adjusted the MZ alignment. The reason |
|
|
606
|
Mon Jun 30 16:00:02 2008 |
josephb, sam | Configuration | Computers | | Sam and I setup Cat6 cable from Megatron to
the 1Y6 Switch (131.215.113.252) and also
connected the 1Y6 Hub to the control room |
|
|
605
|
Mon Jun 30 15:56:22 2008 |
Jenne | Update | Electronics | Fixing the LO demod signal | To make the alarm handler happy, at Rana and
John's suggestion I replaced R14 of the MC's
Demod board, changing it from 4.99 Ohms to |
|
|
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).
|
|
|
603
|
Mon Jun 30 14:07:26 2008 |
Rob | Configuration | PSL | Don't put the bin in front of the air conditioning unit | [quote]We spotted that the laser power was
dropping.
[/quote]
|
|
|
602
|
Mon Jun 30 13:48:47 2008 |
John, Rob | Configuration | PSL | Don't put the bin in front of the air conditioning unit | We spotted that the laser power was dropping.
[SIZE=5][COLOR=blue][FONT=Verdana]The air |
|
|
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. |
|
|
600
|
Mon Jun 30 08:59:23 2008 |
steve | Update | IOO | IOO-MC_DEMOD_LO is low | The alarm handler is beeping relentlessly:
asking for help in high partical count and
low demod signal |
|
|
599
|
Mon Jun 30 05:33:38 2008 |
Koji | Update | General | Abs. Len. Meas. ~ Optical setup (II) | o The position of the iris was adjusted so
as not to disturub the beam for OMCR CCD.
|
|
|
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.
|
|
|
597
|
Sun Jun 29 20:29:48 2008 |
rana | Update | PSL | Correlation of PSL SLOW control v. Room temperature | |
|
|
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.
|
|
|
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]
|
|
|
594
|
Sun Jun 29 19:19:47 2008 |
rana | Summary | IOO | Trends of the PSL/IOO Quads over 1000 days | Only IOO POS has been working for the past
2 years. I guess we should recommission the
IOO ANG and REFL QPDs |
|
|
593
|
Sun Jun 29 18:58:43 2008 |
rana | Summary | Computers | 1e20 is too big for AWG and/or IOVME | While testing out my matlab/awgstream based
McWFS diagnostic script I accidentally put
a
|
|
|
592
|
Sun Jun 29 14:53:02 2008 |
rob | Update | Computers | Rebooting | [quote]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. |
|
|
590
|
Sun Jun 29 02:33:28 2008 |
Koji | Update | General | Abs. Len. Meas. ~ Optical setup (I) | I have constructed the beam injection optics
for the abs length measurement.
|
|
|
589
|
Sat Jun 28 23:23:50 2008 |
John | Update | Computers | Rebooting | All of the computers are now showing green
lights.
|
|