| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
9301
|
Sun Oct 27 23:26:44 2013 |
rana | Update | PEM | Seismometer status | It would be nice if we could use
the existing seismometer cable and place
a 2-terminal temperature sensor within the |
|
|
6946
|
Mon Jul 9 16:28:13 2012 |
Masha | Configuration | General | Seismometer repositioning | Today I REPOSITIONED
THE SEISMOMETERS |
|
|
6951
|
Tue Jul 10 10:50:02 2012 |
Jamie | Configuration | General | Seismometer repositioning |
|
|
|
1141
|
Mon Nov 17 16:59:22 2008 |
Jenne | Update | PEM | Seismometer hooked up, reading channels on DataViewer | Alberto, Jenne
The Guralp Seismometer is (finally) hooked |
|
|
17707
|
Mon Jul 24 13:45:58 2023 |
advait | Update | PEM | Seismometer heating power supply | On Friday afternoon, I added a couple of
fuses to complete the circuit for a power
supply for the heater that is inside the |
|
|
17708
|
Mon Jul 24 15:11:34 2023 |
advait | Update | PEM | Seismometer heating power supply | Also, if someone could share resources
for adding channels it would be great. There
were two old slow Acromag channels, C1:PEM-SEIS_EX_TEMP_MON |
|
|
17731
|
Fri Jul 28 12:11:45 2023 |
advait | Update | PEM | Seismometer heater and temp sensors | I added a heater circuit to the seismometer,
and moved the 4 channel temperature readout
circuit that I built in there as well. The |
|
|
17795
|
Fri Aug 18 15:40:23 2023 |
andrei | Update | PEM | Seismometer heater and temp sensors | Dismantled the seismometer circuit
At Rana's request, Deven and
I have pulled all the wires out of the seismometer |
|
|
17796
|
Fri Aug 18 16:07:38 2023 |
deven | Update | PEM | Seismometer heater and temp sensors | I've turned off the power supply. I've
attached a picture of the rack with the switch
that I flipped circled |
|
|
11530
|
Tue Aug 25 16:33:31 2015 |
Ignacio, Steve | Configuration | PEM | Seismometer enclosure copper foil progress | Steve ordered
about two weeks ago a roll of 0.5 mm thick
copper foil to be used for the inside of |
|
|
12393
|
Wed Aug 10 17:20:16 2016 |
Lydia | Update | General | Seismometer channel names changed | [ericq, Lydia]
We
changed the seismometer channel names from, |
|
|
11449
|
Tue Jul 28 05:00:03 2015 |
Ignacio | Update | General | Seismometer cans | I've have been talking a little |
|
|
13575
|
Wed Jan 24 13:55:04 2018 |
Kira | Summary | PEM | Seismometer can insulation test | Gautam and I set up the insulated seismometer
can in the lab today. I had previously wired
up the two heaters I placed onto the sides |
6x |
|
13582
|
Thu Jan 25 12:41:18 2018 |
Kira | Update | PEM | Seismometer can insulation test | We started the actual heating test today
and it seems to be working so far. Hoping
to heat it to about 40C. We also set |
|
|
13584
|
Thu Jan 25 14:58:20 2018 |
Kira | Update | PEM | Seismometer can insulation test | After almost 3 hours the temperature rose
by about 3.5C. Seems a bit slow, but we can
drive it more if necssary. The heating curve |
|
|
13585
|
Thu Jan 25 16:39:09 2018 |
Kira | Update | PEM | Seismometer can insulation test | The final temperature reached in about
4.5 hours is 30.5C, while the starting temperature
is about 24C. I can't seem to screenshot |
|
|
13598
|
Thu Feb 1 16:09:13 2018 |
Kira | Update | PEM | Seismometer can insulation test | After taking the measurements, calibrating
them (approximately), and filterting them,
I created the following plot. The exponential |
|
|
13605
|
Mon Feb 5 12:12:41 2018 |
Kira | Update | PEM | Seismometer can insulation test | Attached the program I used to create the
plot
|
|
|
13614
|
Wed Feb 7 12:35:56 2018 |
Kira | Update | PEM | Seismometer can insulation test | I subtracted out the lab temperature change
during the period of cooling to see if it
would have a significant effect on the time |
|
|
10368
|
Tue Aug 12 13:31:58 2014 |
Jenne | Update | PEM | Seismometer cables in place, ready for sensors | [TaraV, Jenne]
The short cable from the slab to
the sensor has been assembled and installed |
|
|
10948
|
Wed Jan 28 08:53:01 2015 |
Steve | Update | PEM | Seismometer Vertex is covered |
|
|
|
10976
|
Wed Feb 4 19:21:45 2015 |
Jenne | Update | PEM | Seismometer Vertex is covered | I opened up the spaghetti pot over the
vertex seismometer, and taped the cable to
the slab. The way the cable is coiled, |
|
|
3349
|
Mon Aug 2 18:02:46 2010 |
Jenne | Update | PEM | Seismometer Update: Still not good, but perhpas getting better | Today's seismometer diagnosis activities
are still underway, this is just an update
(since I did some reboots): |
|
|
3351
|
Tue Aug 3 01:51:01 2010 |
Jenne | Update | PEM | Seismometer Update: Still not good, but perhaps getting better |
|
|
|
5200
|
Thu Aug 11 19:14:22 2011 |
Ishwita , Manuel | Update | PEM | Seismometer STS2(Bacardi, Serial NR 100151) moved near ETMX | We moved the STS2(Bacardi, Serial NR 100151)
to his new location and laid his cable from rack |
|
|
3354
|
Tue Aug 3 11:50:16 2010 |
Jenne | Update | PEM | Seismometer Problem Tracked down | After some cable swapping this morning,
I have determined which cable is bad.
It's the Gur1 cable between the seismometer |
|
|
13850
|
Wed May 16 21:47:17 2018 |
Kevin | Update | PEM | Seismometer Noise Spectra | Earlier today Kira and I reconnected the
EX seismometer. I just took some spectra
of all three seismometers, shown in the attachments, |
|
|
2237
|
Wed Nov 11 12:50:10 2009 |
Jenne | Update | PEM | Seismometer Noise Characteristics | The attached plot shows the spectra of
the 3 Z axes of the 3 seismometers we have
(this data is from ~20Aug2009, when the Ranger |
|
|
2833
|
Thu Apr 22 20:28:40 2010 |
Jenne | Update | PEM | Seismometer Noise Characteristics |
|
|
|
12224
|
Tue Jun 28 22:54:43 2016 |
Aakash | Update | General | Seismometer Enclosure Development | SURF 2016 | The existing enclosure for seismometer
at LIGO 40m lab is a cylindrical stainless
steel can placed upside down over the seismometer. |
|
|
12236
|
Fri Jul 1 01:52:54 2016 |
Aakash | Update | General | Seismometer Enclosure Development | SURF 2016 | I have transferred most of the temperature
measurement stuff from the front area to
seismometer at the end of Y-arm. While |
|
|
12253
|
Wed Jul 6 16:40:09 2016 |
Aakash | Update | General | Seismometer Enclosure Development | SURF 2016 | I am using AD592CNZ temperature
transducer ICs for measuring temperature
inside as well as outside the enclosure. |
|
|
12256
|
Wed Jul 6 20:51:00 2016 |
Koji | Update | General | Seismometer Enclosure Development | SURF 2016 | Circuit1: It is nice to
receive the voltage across the transimpedance
resistor with a high impedance buffer (or |
|
|
12160
|
Thu Jun 9 09:57:06 2016 |
Aakash | Update | General | Seismometer Enclosure Development |
Me and Gautam yesterday
opened the tilt-free seismometer enclosure
to see if we could use the thermocouples |
|
|
826
|
Mon Aug 11 19:09:28 2008 |
Jenne | DAQ | PEM | Seismometer DAQ is being funny | While looking at the Ranger seismometer's
output to figure out what our max typical
ground motion is, Rana and I saw that the |
|
|
4061
|
Wed Dec 15 18:29:59 2010 |
Jenne | Update | PEM | Seismometer Channels Being Recorded Again | The Seismometer channels are once more
being recorded. Alastair brought Gur1
back from the ATF the other day, and today |
|
|
4807
|
Fri Jun 10 20:23:56 2011 |
Larisa Thorne | Update | Electronics | Seismometer Box Update/graphs | (continuation of this)
The noise graphs relating total noise |
|
|
4810
|
Mon Jun 13 16:27:10 2011 |
Jenne | Update | Electronics | Seismometer Box Update/graphs |
|
|
|
4774
|
Tue May 31 16:07:57 2011 |
Larisa Thorne | Configuration | Electronics | Seismometer Box Update | (Continuation of this)
I plugged the circuit into the LISO |
|
|
4785
|
Sat Jun 4 15:26:04 2011 |
Larisa Thorne | Update | Electronics | Seismometer Box Update | (continuation of this)
Here are the transfer function and |
|
|
13777
|
Fri Apr 20 23:36:28 2018 |
Kevin | Update | PEM | Seismometer BLRMs | Steve secured the GPS time server in the
rack above the AA board and removed the wooden
block that it was resting on. The new rack |
|
|
13787
|
Tue Apr 24 21:19:08 2018 |
Kevin | Update | PEM | Seismometer BLRMs | In the ongoing attempt to recover the seismometer
BLRMS, I removed the AA board from the rack
and modified the BS seismometer Z channel. |
|
|
11268
|
Sun May 3 01:04:19 2015 |
rana | Summary | PEM | Seismo signals are bad | https://ldas-jobs.ligo.caltech.edu/~max.isi/summary/day/20150502/pem/seismic/
Looks like some of our seismometers
are oscillating, not mounted well, or something |
|
|
2638
|
Wed Feb 24 16:11:15 2010 |
Jenne | Update | PEM | Seismic witnesses near MC1 tank moved | Since we're going to open the MC1 tank
tomorrow, I've moved the MC1 accelerometers
and the Guralp over to underneath MC2 for |
|
|
2661
|
Sun Mar 7 23:05:39 2010 |
rana | Update | PEM | Seismic witnesses near MC1 tank moved |
|
|
|
5986
|
Wed Nov 23 02:34:28 2011 |
Mirko | Update | PEM | Seismic spectrum & Striptool | The Striptool for the BLRMS seismic channels
is running now. Channels are ( still ) recorded
as slow EPICS channels. |
|
|
13146
|
Thu Jul 27 22:42:24 2017 |
gautam | Update | SUS | Seismic noise, DAC noise, and Coil Driver electronics noise | Summary:
|
|
|
5856
|
Wed Nov 9 20:35:58 2011 |
Mirko | Update | Adaptive Filtering | Seismic noise injection into the MC | Very elaborated measurement ;-)
On 11-11-08:
18:40 Stomp near STS1 for 2mins |
8x |
|
15282
|
Tue Mar 24 19:41:57 2020 |
gautam | Update | Wiener | Seismic feedforward for MCL | Summary:
I think the feedforward filters
used for stabilizing MCL with vertex seismometers |
|
|
12906
|
Fri Mar 24 19:04:18 2017 |
gautam | Update | IMC | Seismic feedforward and WFS | [valera, gautam]
On Wednesday at the meeting, we
were discussing why we aren't able to |
|