| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
448
|
Mon Jan 10 14:27:11 2011 |
Jan | Summary | PEM | Weekly plots; starting date 01/01/2011 | So I don't know what's going on,
but the table is doing something really terrible.
Maybe it vibrates as a response to ventilation, |
|
|
2041
|
Thu Jan 11 12:33:06 2018 |
awade | Summary | Schedule | Weekly todo list W2:2018 | Updated todo list is up on the labdata
git ctn_labdata/issue/10.
Priority over the next week is |
|
|
2401
|
Tue Aug 27 18:56:58 2019 |
anchal | DailyProgress | NoiseBudget | What values of Loss Angles are good? | The new noisebudget code follows Hong
et al . PRD 87, 082001 (2013) calculations
to calculate Coating Brownian noise. This |
|
|
1848
|
Thu Aug 3 01:24:05 2017 |
awade | DailyProgress | FSS | Wiring up FSS boxes into acromag cards | To date we have been manually engaging the
TTFSS boxes for the PDH locking of the lasers
to reference cavities. There is a sub-D |
|
|
1229
|
Tue Jul 9 14:47:44 2013 |
Erica | Notes | BEAT | Writing progress report | July 7, 2013
Took pictures of the setups for mode matching
and recombining the beams. I added beam |
|
|
1252
|
Tue Jul 23 11:43:00 2013 |
Evan | DailyProgress | Electronics Equipment | Zach's op-amp recommendations | Zach wrote up his thoughts on how to choose
the right op-amp in [URL=http://nodus.ligo.caltech.edu:8080/AdhikariLab/1752]ATF:1752[/URL].
|
|
|
368
|
Mon Sep 20 20:57:40 2010 |
tara | DailyProgress | PMC | a part of PMC servo is verified |
I
measured PMC's TF between MIXER OUT and PCMON, |
|
|
65
|
Fri Feb 12 12:46:38 2010 |
Tara Chalermsongsak | Laser | Laser | a picture of beam path on the optic bench | I took a picture of the setup in
PSL lab, and drew a line for laser path.
I omit the mode cleaning part since it's |
|
|
1428
|
Tue Jun 10 17:00:18 2014 |
tara | Notes | NoiseBudget | aLIGO Noise budget with uncertainties in material parameters | I'm working on estimating aLIGO sensitivity
when material uncertainties are taken into
account. I have a result for a reference |
|
|
1432
|
Mon Jun 23 17:13:06 2014 |
tara | Notes | NoiseBudget | aLIGO Noise budget with uncertainties in material parameters | I'm estimating the BNS range
of aLIGO. Here is a quick note about the
calculation. |
|
|
1433
|
Mon Jun 23 19:23:57 2014 |
rana | Notes | NoiseBudget | aLIGO Noise budget with uncertainties in material parameters |
That GWINC link is more than
a year old. You're best off just updating |
|
|
1436
|
Thu Jun 26 03:41:31 2014 |
tara | Notes | NoiseBudget | aLIGO Noise budget with uncertainties in material parameters |
|
|
|
1444
|
Wed Jul 2 20:05:32 2014 |
tara | Notes | NoiseBudget | aLIGO Noise budget with uncertainties in material parameters | The calculation for LIGO
astronomical reach with uncertainties are
updated. See the details below. |
6x |
|
79
|
Fri Feb 26 11:40:47 2010 |
Frank | Computing | DAQ | acav VME crate stopped working | last night one of the DAQ cards failed
and the acav crate stopped working, so also
the temp stabilization of the analyzer cavity |
|
|
808
|
Wed Feb 1 15:46:51 2012 |
tara | DailyProgress | Electronics Equipment | acav characterization | I'm working on characterizing ACAV loop
to check if the loop is good enough for the
coating noise measurement. The results show |
|
|
809
|
Thu Feb 2 23:51:32 2012 |
frank, tara | DailyProgress | Electronics Equipment | acav characterization | We measured the TF of marconi using PLL
loop. Marconi has flat response up to around
200kHz. This is quite good and we can certainly |
|
|
810
|
Sat Feb 4 03:18:08 2012 |
tara | DailyProgress | Electronics Equipment | acav characterization | I checked the TF of the amplifier used
in the ACAV loop because I did not measure
that yesterday. The amplifier's TF |
|
|
811
|
Mon Feb 6 22:35:49 2012 |
frank, tara | DailyProgress | Electronics Equipment | acav characterization | TF from all components except the sevo
is measured (collectively). This will help
us to determine what kind of servo(UPDH) |
|
|
49
|
Thu Feb 4 22:01:27 2010 |
Frank | Laser | RefCav | acav re-aligned | acav is now re-aligned. As Tara stopped
aligning the AOM i will use the NPRO pzt
to lock it (instead of the VCO). Then i will |
|
|
873
|
Wed Mar 7 11:39:37 2012 |
Tara, Frank | Notes | TempCtrl | acav temp tuning - 2nd try | previous measurement is invalid - due to
changing in the alignment from floated table
to unfloated table over night we don't know |
|
|
559
|
Thu Mar 31 20:47:32 2011 |
tara | DailyProgress | Seismic | accelerometer installed on the table | Today we installed two accelerometers
on the table, for vertical and horizontal(beamline)
positions. |
|
|
945
|
Fri Apr 27 10:30:57 2012 |
Frank | Notes | Acoustics | acoustic damping from plexiglas and sandwich structures | sandwich structures using plexiglas : "Damped
Windows for Aircraft Interior Noise Control"
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.79.9176 |
|
|
948
|
Tue May 1 03:12:58 2012 |
frank, tara | DailyProgress | Acoustics | acoustic enclosure for input beam | We started making the acoustic enclosure
around the input beam area (second half of
the table, before the chamber). The frame |
|
|
950
|
Tue May 1 23:58:21 2012 |
frank, tara | DailyProgress | Acoustics | acoustic enclosure for input beam | We added the lid on top of the enclosure.
More work is needed to complete the box.
We made the closing |
|
|
951
|
Wed May 2 19:48:32 2012 |
frank, tara | DailyProgress | Acoustics | acoustic enclosure for input beam | We measured
the frequency response(microphone out/signal
to speaker) to see how well we can shield |
|
|
952
|
Thu May 3 22:26:14 2012 |
frank, tara | DailyProgress | Acoustics | acoustic enclosure for input beam | We are still working on the acoustic shielding
panels. The work should be done by tomorrow.
|
|
|
953
|
Fri May 4 20:19:58 2012 |
frank, tara | DailyProgress | Acoustics | acoustic enclosure for input beam | The enclosure box for input optics are
done. We still need to order more of the
nuts for one panel, but the box should provide |
|
|
955
|
Wed May 9 03:11:33 2012 |
frank, tara | DailyProgress | Acoustics | acoustic enclosure for input beam | I check the performance of the enclosure
box for input optics. It neither improves
the beat signal that much. |
|
|
972
|
Wed May 30 23:39:15 2012 |
frank, tara | DailyProgress | Acoustics | acoustic enclosure for input beam | We started installing the new acoustic
enclosure box for the beat path. It covers
the whole beat setup and the part for power |
|
|
973
|
Wed May 30 23:39:41 2012 |
frank, tara | DailyProgress | Acoustics | acoustic enclosure for input beam | We started installing the new acoustic
enclosure box for the beat path. It covers
the whole beat setup and the part for power |
|
|
975
|
Fri Jun 1 01:00:30 2012 |
frank, tara | DailyProgress | Acoustics | acoustic enclosure for input beam | The beat signal is measured with an adhoc
lid covering the enclosure on the beat part.
There are no significant improvement in the |
|
|
917
|
Mon Apr 16 03:42:39 2012 |
Frank | Notes | Purchases | acoustic insulation | ordered thin (1in) t-channel aluminum frame
parts from mcmaster (similar to bosch framing,
but cheaper, link) |
|
|
1929
|
Mon Sep 18 19:45:04 2017 |
awade, Craig | DailyProgress | Electronics Equipment | acromag1 reboot | Acromag1 and ws3 have both been reconnected
to the network and booted.
New ModbusApp session is started |
|
|
357
|
Sat Sep 11 02:04:26 2010 |
tara | DailyProgress | DAQ | added PD for power monitoring | A photodiode for measuring the laser
power reflecting from the Faraday isolator's
in port is added. |
|
|
1261
|
Mon Jul 29 13:30:26 2013 |
Erica | DailyProgress | BEAT | adding resistor, capacitor, and sockets | July 26, 2013
Was able to place the 24k ohm resistor in |
|
|
1265
|
Tue Jul 30 12:23:41 2013 |
Erica | DailyProgress | BEAT | addressed noise problem, DC signal | july 29, 2913
Worked on progress report due Friday.
|
|
|
436
|
Mon Dec 20 14:35:23 2010 |
tara | Notes | Electronics Equipment | adjusting polarization for 35.5 MHz EOM | Last week I accidentally changed the polarization
of the beam to the 35.5 MHz EOM. So I optimize
it again to minimize an RFAM effect. |
|
|
866
|
Mon Mar 5 17:15:03 2012 |
Frank | Notes | Schedule | air spring isolation | machined all steel parts myself this morning
and submitted them for welding to Mike. He
said we can pick it up at the end of the |
|
|
857
|
Fri Mar 2 01:02:50 2012 |
Frank | Notes | Seismic | air spring isolation design | after talking several times to the machine
shop guys and checking stock at central we
came up with the following design for the |
|
|
877
|
Thu Mar 8 21:48:46 2012 |
Frank, Koji | DailyProgress | Seismic | air spring isolation installation finished | got some T-connectors and connected all
four springs to the lab air supply. The pressure
of 32PSI is barely enough to float the chamber. |
|
|
875
|
Thu Mar 8 01:15:50 2012 |
Frank | DailyProgress | Seismic | air spring isolation installed | [Tara, Frank, Zach, Jenne]
i've picked up all parts, tapped
a few more holes and assembled the two beams. |
|
|
2618
|
Wed Dec 7 11:01:24 2022 |
aaron | Summary | Safety | airflow monitor installation | Rueben from Technical Safety Services installed
and calibrated an Apex 1000 airflow monitor
for the fume hood in CTN. Its power supply |
|
|
70
|
Fri Feb 19 18:23:24 2010 |
Tara Chalermsongsak | Laser | RefCav | alignment for measuring beat between 2 cavities | I finished aligning the beams from Ref
cavity and Acavity, broke a connector on
the PD we were going to used to measure the |
|
|
92
|
Thu Mar 25 13:05:59 2010 |
Frank | Misc | RefCav | all parts baked | by now all parts are baked and ready for
assembly. The only part we couldn't bake
is the chamber itself. But Bob said that |
|
|
318
|
Mon Aug 30 23:47:30 2010 |
tara | Notes | Environment | antack (ants attack) | I think ants are now building their
colony in the lab, even though there is no
garbage, they can find some food around here. |
|
|
319
|
Tue Aug 31 13:26:32 2010 |
Frank | Notes | Environment | antack (ants attack) | any results from the poison from 40m they
tried in the TCS lab? Did it work?If yes
we should get some for the other labs too.... |
|
|
93
|
Mon Mar 29 17:46:41 2010 |
Frank, Tara | Misc | RefCav | assembled new vacuum chamber | we cleaned
and assembled the new vaccum chamber. we
installed an electical feedtrough (for sensors |
|
|
1085
|
Wed Nov 28 20:37:57 2012 |
tara | HowTo | RefCav | assembling short ref cav | [Peter, Tara], we assembled 2 short reference
cavities today. The bonding between the spacers
and mirrors are strong and holding the mirrors |
|
|
905
|
Tue Apr 10 00:50:56 2012 |
frank, tara | DailyProgress | optic | bad PBS | We noticed wide angle scattered light behind
the PBS in front of RCAV. The scattering
source is probably the curved mirror behind |
|
|
906
|
Wed Apr 11 02:44:29 2012 |
frank, tara | DailyProgress | optic | bad PBS | Update, beat measurement after several
optics replacement. Peaks around 10 Hz, 35
Hz show up this time. |
|