| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
1120
|
Fri Nov 7 08:08:00 2008 |
steve | Update | PEM | AC turned off in IFO room | All [COLOR=red]tree[/COLOR] AC units in IFO
room 104 switched off at 7:45am
I'm looking for the periodic thump signal |
|
|
1119
|
Thu Nov 6 22:07:56 2008 |
rana | Configuration | Computers | ELOG compile on Solaris | From the ELOG web pages:
Solaris:
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|
|
1117
|
Thu Nov 6 10:06:41 2008 |
steve | Update | Locking | arms lock degradation | I have been locking the arms in the mornings
lately.
The daily drift of LSC-TRX is ~ 15% and LSC-TRY |
|
|
1116
|
Thu Nov 6 09:45:27 2008 |
steve | Update | MOPA | head temp hick-up vs power | The control room AC temp was lowered from
74F to 70F around Oct 10
This hold the head temp rock solid 18.45C |
|
|
1115
|
Wed Nov 5 12:41:36 2008 |
Alberto | Update | LSC | Absolute Length and g-factor measurements conclusions | [SIZE=4][B][COLOR=green]Absolute Length and
g-Factor Measurement for the 40m Arm Cavities,
Summary of Results[/COLOR][/B][/SIZE]
|
|
|
1114
|
Tue Nov 4 17:58:42 2008 |
Alberto | DAQ | PSL | MC temperature sensor | I added a channel for the temperature sensor
on the MC1/MC3 chamber: C1:PSL-MC_TEMP_SEN.
To do that I had to reboot the frame builder. |
|
|
1113
|
Tue Nov 4 01:03:01 2008 |
rana | Summary | PEM | periodic thump noise in MC1_ACC | [B]There seems to be a periodic thump seen
by the MC1 Accelerometers as well as the
surrounding optics.[/B]
|
|
|
1112
|
Tue Nov 4 00:47:53 2008 |
rana | Update | ASS | Wiener Filter performance over 5 hours | Same as before, but now with a working Ranger
seismometer.
|
|
|
1111
|
Mon Nov 3 22:35:40 2008 |
rana | Update | ASS | Wiener Filter performance over 5 hours | [FONT=Comic Sans MS]To speed up the Wiener
filter work I defined a 256 Hz version of
the original 16kHz IOO-MC_L signal. The
|
|
|
1110
|
Mon Nov 3 21:38:32 2008 |
Yoichi | Configuration | General | new elog | [quote]I tried to recompile the elog from
the source code but the way gcc is called
must be wrong because I get this error message:
|
|
|
1109
|
Mon Nov 3 19:18:47 2008 |
Alberto | Configuration | General | new elog | Phil Ehrens kindly poured our elog's content
in a CD that now is here at the 40m.
I've been trying to install the 2.7.5 version |
|
|
1108
|
Mon Nov 3 19:12:27 2008 |
alberto | Update | General | Transverse mode spacing measurement for the X arm | I know a lot of expectations have been building
up on these days in the scientific community
at the 40m towards a conclusive elog entry |
|
|
1107
|
Mon Nov 3 09:59:47 2008 |
steve | Update | PSL | PSL HEPAs turned on | The psl [COLOR=chocolate]enclosure[/COLOR]
HEPAs were tuned on.
|
|
|
1106
|
Sun Nov 2 21:37:22 2008 |
rana | Update | PEM | Ranger recovery | The ranger signal has been bad since around
11 AM on Oct 25 (last Saturday). There are
no elog
|
|
|
1105
|
Sun Nov 2 20:44:58 2008 |
rana | Update | ASS | Wiener Filter performance over 5 hours | I took one 2 hour stretch of data to calculate
a MISO Wiener filter to subtract the Ranger
seismometer
|
|
|
1104
|
Sun Nov 2 20:21:58 2008 |
rana | Configuration | lore | HP 5550dtn (Grazia) set up on allegra | I set up printing to grazia from allegra.
The CUPS interface was not as straightforward
as Tobin had made it seem in the Wiki. I |
|
|
1103
|
Fri Oct 31 08:52:19 2008 |
steve | Update | SUS | ETMY damping restored | ETMY watchdogs were tripped yesterday morning
also. This is a problem that existed some
months ago.(?)
|
|
|
1102
|
Thu Oct 30 20:39:47 2008 |
caryn | Configuration | PEM | temperature sensor | We attached the temperature sensor box to
the MC1/MC3 chamber with a C-clamp. We connected
the temp sensor to a 2nd box with a short |
|
|
1101
|
Thu Oct 30 11:07:25 2008 |
Yoichi | Update | Computers | Wireless bridges arrived | Five wireless bridges for the GPIB-Ethernet
converters arrived.
One of them had a broken AC adapter. We have |
|
|
1100
|
Wed Oct 29 12:54:28 2008 |
Jenne | Update | PEM | Calibrated Guralp Noise compared to average ground motion | Here is a calibrated noise plot of the Guralp
seismometer box. This is the same noise
measured on Friday, measured at TP3 (just |
|
|
1099
|
Wed Oct 29 12:23:04 2008 |
Yoichi | Configuration | PSL | MZ alignment touched and the alarm level changed | Since the MZ reflection is alarming all the
time, I tried to improve the MZ alignment
by touching the folding mirror.
|
|
|
1098
|
Tue Oct 28 12:01:01 2008 |
josephb | Configuration | Computers | linux2 | [quote]I have removed linux2 and its cables
from the control room and put it into 1Y3
along with op340m.
|
|
|
1097
|
Tue Oct 28 11:10:18 2008 |
Alberto | Update | LSC | Higher Order Mode resonances in the X arms | [quote]Recently we had been having some trouble
locking the full IFO in the [COLOR=green][I][FONT=Verdana]spring[/FONT][/I][/COLOR]
configuration (SRC on [COLOR=blue]+166[/COLOR]).
|
|
|
1095
|
Mon Oct 27 14:48:27 2008 |
Yoichi | Configuration | PSL | EO shutter installed to the reference cavity | I'm now preparing for cavity ring down measurements
of the reference cavity.
An EOM for polarization rotation is installed |
|
|
1094
|
Mon Oct 27 11:23:10 2008 |
steve | Update | Photos | new Olympus camera with IR vision | The IR blocker was removed from our new Olympus
camera
SP 570UZ camera.
|
|
|
1093
|
Mon Oct 27 11:16:23 2008 |
Alberto | Configuration | IOO | StochMon Calibration | I implemented the calibration for the four
channels of the StochMon in the ioo EPICS
database. Now the output of those channels, |
|
|
1092
|
Mon Oct 27 10:02:16 2008 |
Yoichi | Update | Computer Scripts / Programs | SVN medm problem | I tried to check out medm directory both from
my laptop and nodus.
I did not get the error.
|
|
|
1091
|
Sun Oct 26 21:02:18 2008 |
rana | Update | Computer Scripts / Programs | SVN medm problem | As we've seen in the past a few times, there's
something wrong with the files in the [I]trunk/medm[/I]
area.
|
|
|
1090
|
Fri Oct 24 22:30:38 2008 |
Jenne,rana | Update | PEM | Noise from Guralp Seismometer | Attached is a Power Spectrum of the noise
on the Vert1 channel of the Guralp seismometer.
The noise is in the several hundreds of |
|
|
1089
|
Fri Oct 24 21:49:15 2008 |
Jenne | Configuration | PEM | Short Seismometer Cable | Bad news regarding the cable that goes between
the Guralp seismometer and the box that I've
been working on: it's too short by about |
|
|
1088
|
Fri Oct 24 20:54:41 2008 |
rana | Configuration | Computers | linux2 | I have removed linux2 and its cables from
the control room and put it into 1Y3 along
with op340m.
|
|
|
1087
|
Fri Oct 24 18:05:01 2008 |
Alberto | Update | General | Abs length: transverse mode spacing measured for the X arm | The ETMX suffers of astigmatism. I measured
the following frequencies for the higher
order modes:
|
|
|
1086
|
Fri Oct 24 17:21:13 2008 |
Alberto | Update | General | Abs length: the right amount of beam clipping | I found the reason why the peak at about 6.3MHz
appeared only on the TEM10 mode: the blade
was clipping the beam too much and it was |
|
|
1085
|
Fri Oct 24 15:05:13 2008 |
steve | Update | VAC | rga is out of order | The old Dycor RGA is out of order.
I'm getting ready to purchase an SRS instrument. |
|
|
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
|
|
|
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 |
|