| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
1084
|
Fri Oct 24 11:42:48 2008 |
Alberto | Update | General | Abs length: locking the X arm cavity in TEM01/10 | I went back to lock the arm cavity in either
TEM01 or TEM10 mode. Attached are the results.
We still have several resonances which we |
|
|
1083
|
Fri Oct 24 11:21:26 2008 |
pete | Configuration | PSL | FSS LO input calibrated in dBm | Based on the measurements described in my
previous elog, I created a new calc record
in the file /cvs/cds/caltech/target/c1psl/psl.db
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|
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1082
|
Fri Oct 24 11:09:08 2008 |
steve | Update | SAFETY | more lexan plates under cameras | The MC2, MC3&1 and BSC-SUS cameras were repositioned
somewhat in the
process of placing lexan disks under neat |
|
|
1081
|
Fri Oct 24 10:06:16 2008 |
Yoichi | Configuration | IOO | MC gain and FSS gain changed | Following the measurements of MC and FSS loop
gains, I modified mcup script to set the
MC VCO gain to 2dB (it was -4dB before).
|
|
|
1080
|
Thu Oct 23 23:09:18 2008 |
Yoichi | Update | PSL | MC UGF is now 75kHz | I measured three loop transfer functions of
the MC servo.
The blue curve in the first attachment is |
|
|
1079
|
Thu Oct 23 21:52:27 2008 |
Yoichi | Update | PSL | FSS UGF now 450kHz | I measured the open loop transfer function
of the FSS, for the first time after I mitigated
the oscillation.
|
|
|
1078
|
Thu Oct 23 20:47:28 2008 |
pete | Configuration | PSL | FSS LO calibration for MEDM | Today I took a quick series of measurements
to calibrate the FSS LO power measurement
in the MEDM. This was done by using the |
|
|
1076
|
Thu Oct 23 18:51:19 2008 |
Alberto | Metaphysics | Computers | eLog | I checked it and the latest version of the
elog software, the 2.7.5 (we have the 2.6.5)
has, among new nice features, the very good |
|
|
1075
|
Thu Oct 23 18:45:18 2008 |
Alberto | Omnistructure | Computer Scripts / Programs | Python code for GPIB devices developed for the Absl length experiment | I wrote two Python scripts for my measurement
that can be also used/imitated by others:
sweepfrequency. py and HP8590.py. The first |
|
|
1074
|
Thu Oct 23 18:27:04 2008 |
Alberto | Update | General | Abs length | [quote]Here are the measurements I've got
yesterday. The plot shows the transmitted
power after the X arm while sweeping the |
|
|
1073
|
Thu Oct 23 18:23:47 2008 |
Alberto | Update | General | Abs length | [quote]Here are the measurements I've got
yesterday. The plot shows the transmitted
power after the X arm while sweeping the |
|
|
1072
|
Thu Oct 23 15:27:19 2008 |
Alberto | Update | General | Abs length | Here are the measurements I've got yesterday.
The plot shows the transmitted power after
the X arm while sweeping the frequency of |
|
|
1071
|
Thu Oct 23 11:26:25 2008 |
steve | Bureaucracy | VAC | optosigma forks for vacuum | Nine short forks from OptoSigma were cleaned,
baked and measured by Bob T.
They passed the LIGO vac compatiblity test |
|
|
1070
|
Wed Oct 22 20:50:30 2008 |
Alberto | Omnistructure | Computers | GPS | Today I measured the GPS clock frequency at
the output of CLOCK_MON in a board on the
same crate where the c1iool0 computer is |
|
|
1069
|
Wed Oct 22 17:48:58 2008 |
Yoichi | Update | General | Lenses for focusing the optical lever laser (Re:divergence of He Ne 1035P) | Steve had difficulty in finding lenses for
focusing the HeNe laser for the ITM op-lev.
Following his measurement of the beam divergence, |
|
|
1068
|
Wed Oct 22 16:22:53 2008 |
steve | Bureaucracy | SAFETY | Caryn received safety training | Caryn Polatchi has received 40m safety training
on Monday, Oct 20 |
|
|
1067
|
Wed Oct 22 12:37:47 2008 |
josephb | Update | Computers | Network spreadsheet | Attached in open office format as well as
excel format is spreadsheet containing all
the devices with IP addresses at the 40m. |
|
|
1066
|
Wed Oct 22 09:42:41 2008 |
Alberto | DAQ | Computers | c1iool0 rebooted and MC autolocker restarted | This morning I found the MC unlocked. The
MC-Down script didn't work because of network
problems in communicating with scipe7, a.k.a. |
|
|
1065
|
Tue Oct 21 18:19:42 2008 |
Yoichi | Configuration | Computers | LISO and Eagle installed | I installed LISO, a circuit simulation software,
into the control room linux machines.
I also installed a PCB CAD called Eagle to |
|
|
1064
|
Tue Oct 21 17:52:30 2008 |
rana | Summary | PSL | FSS Photo: early October | This is a photo of the FSS board before Yoichi
did his surgery - it was taken with the D40
in macro mode, sitting on the big Gorilla |
|
|
1063
|
Tue Oct 21 16:17:45 2008 |
Yoichi | Update | PSL | AD797 Oscillation in the FSS board | I checked each op-amp's output in the FSS
board to see if any indication of slew-rate
saturation can be found.
|
|
|
1062
|
Tue Oct 21 16:14:42 2008 |
steve | Update | General | divergence of He Ne 1035P | The ITM oplevs laser diodes are noisy.
They will be replaced by JDS 1035P
SN T8093307 was measured with the beamscanner.
|
|
|
1061
|
Mon Oct 20 20:50:09 2008 |
Yoichi | Configuration | PSL | FSS board chip replacement | A quick update.
I changed two AD797s on the FSS board to |
|
|
1060
|
Mon Oct 20 16:18:00 2008 |
Alan | Configuration | Computers | /cvs/cds restored | [quote]I moved missing files in /cvs/cds restored
by Alan and Stuart to the original locations.
I confirmed autoburt runs, and dtt, which |
|
|
1059
|
Mon Oct 20 15:02:00 2008 |
Yoichi | Configuration | Computers | /cvs/cds restored | I moved missing files in /cvs/cds restored
by Alan and Stuart to the original locations.
I confirmed autoburt runs, and dtt, which |
|
|
1058
|
Mon Oct 20 12:18:38 2008 |
Alan | Update | Computer Scripts / Programs | burtwb missing on Solaris but installed on linux64 | [quote]c1lsc stalled this evening, so I powercycled
it.
After that, I tried to lock arms to confirm |
|
|
1057
|
Mon Oct 20 09:45:56 2008 |
steve | Update | PEM | PSL HEPA on | The PSL HEPA filter was turned on.
It should be running all times.
The 0.5 micron particle count is up to 20,000 |
|
|
1056
|
Fri Oct 17 21:41:09 2008 |
Yoichi | Update | Computer Scripts / Programs | burtwb missing on Solaris but installed on linux64 | c1lsc stalled this evening, so I powercycled
it.
After that, I tried to lock arms to confirm |
|
|
1055
|
Fri Oct 17 16:43:10 2008 |
Yoichi | Configuration | Computers | mcup/down scripts on linux | I made some changes to /cvs/cds/caltech/medm/c1/ioo/cmd/medmMCup
and medmMCdown so that those can be run from
medm on linux machines. |
|
|
1054
|
Thu Oct 16 16:26:26 2008 |
pete | Configuration | PSL | FSS phase matching cable installed | RG 405 cable has a solid teflon dielectric,
and a velocity factor of 0.69. To get the
8.2 degrees of additional phase on the LO |
|
|
1053
|
Thu Oct 16 13:12:58 2008 |
pete | Configuration | PSL | phase between FSS reference outputs | I verified the phase between the FSS reference
outputs (used for LO and RF) using matched
BNC cables. I measured 0.95 degree (average |
|
|
1052
|
Thu Oct 16 09:47:49 2008 |
Yoichi | Configuration | PSL | FSS ref phase measurements | [quote] I fit the bottom (quadratic) portion
of this curve, and found an optimum delay
of 25.8 ns, which can be implemented as 25.81 |
|
|
1051
|
Thu Oct 16 09:44:49 2008 |
Yoichi | Update | PSL | Bad cable for FSS | Yesterday arount 1:30PM, we lost the LO signal
for the FSS.
I found it was caused by a bad cable connecting |
|
|
1050
|
Wed Oct 15 22:07:52 2008 |
pete | Configuration | PSL | FSS ref phase measurements | Optimizing the FSS LO/RF phase at 500 kHz,
above the servo band, proved to be noisy
and those measurements were useless. Today |
|
|
1049
|
Wed Oct 15 17:40:50 2008 |
rana | Update | PSL | PMC Offset adjusted | I set the PMC servo input offset: closed the
MOPA shutter, zeroed the mixer output with
the offset slider,
|
|
|
1048
|
Tue Oct 14 19:24:34 2008 |
Yoichi | Configuration | PSL | FSS light power reduced | Rana, Yoichi
To change the gain distribution in the FSS, |
|
|
1047
|
Tue Oct 14 19:18:18 2008 |
Yoichi | Update | Computers | BootFest | Rana, Yoichi
Most of the FE computers failed around the |
|
|
1046
|
Tue Oct 14 14:19:36 2008 |
pete | Configuration | PSL | FSS ref phase | Today I made several measurements which should
yield the optimized phase for the FSS 21.5
MHz reference. I made two sets of measurements, |
|
|
1045
|
Mon Oct 13 18:59:39 2008 |
Yoichi | Update | PSL | NPRO EMI and FSS error signal correlation | I made a simple loop antenna to measure the
electro-magnetic inteference (EMI) around
the master oscillator NPRO.
|
|
|
1044
|
Mon Oct 13 13:56:03 2008 |
Yoichi | Update | PSL | MOPA is not that much in trouble now | The problem was found to be all to do with
the shutter.
The shutter started to work again, after |
|
|
1043
|
Mon Oct 13 13:51:49 2008 |
pete | Configuration | PSL | attempt to measure FSS ref phase | On Friday I began a measurement of the FSS
reference phase. The setup involves the
following:
|
|
|
1042
|
Mon Oct 13 11:32:50 2008 |
Yoixhi | Update | PSL | MOPA is in trouble now | Steve, Alberto, Yoichi
A quick update.
|
|
|
1041
|
Fri Oct 10 20:03:35 2008 |
Yoichi | Configuration | Computers | medm, dataviewer, dtt on 64 bit linux | I compiled EPICS (base, medm and ezca) and
dataviewer for 64 bit linux.
These are installed in /cvs/cds/caltech/apps/linux64/.
|
|
|
1040
|
Fri Oct 10 13:57:33 2008 |
Alberto | Omnistructure | Computers | Problems in locking the X arm | This morning for some reason that I didn't
clearly understand I could not lock the Xarm.
The Y arm was not a problem and the Restore |
|
|
1039
|
Fri Oct 10 10:20:42 2008 |
Alberto | Omnistructure | Computers | FEs are down | [quote]
The front-end machines are all down. Another
cosmic-ray in the RFM, I suppose. Whoever |
|
|
1038
|
Fri Oct 10 00:34:52 2008 |
rob | Omnistructure | Computers | FEs are down |
The front-end machines are all down. Another
cosmic-ray in the RFM, I suppose. Whoever |
|
|
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.
|
|