| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13871
|
Mon May 21 10:15:35 2018 |
gautam | Update | PEM | test setup with seismometer | I guess it's fine for now while we
are still finalizing the setup at EX, but
we should eventually line up the seismometer |
|
|
13872
|
Mon May 21 14:17:28 2018 |
Kira | Update | PEM | test setup with seismometer | I have attached the graph for the seismometer
temperature fluctuations over 3 days. As
we can see, there is a noticeable fluctuation |
|
|
13877
|
Tue May 22 14:49:03 2018 |
Kira | Update | PEM | test setup with seismometer | It appears that one of the wires was disconnected
overnight or this morning so I wasn't
able to gather data over a full 24 hour period. |
|
|
13882
|
Wed May 23 14:50:33 2018 |
Kira | Update | PEM | test setup with seismometer | This time the test went without issue.
The first attachment is the data for the
past 24 hours and the second attachment is |
|
|
13887
|
Thu May 24 15:18:12 2018 |
Kira | Update | PEM | PID loop restarted | Rana said that it wasn't necessary
to gather more data on the temperature fluctuations
so I have reconnected the heater circuit |
|
|
13888
|
Thu May 24 16:08:12 2018 |
Kira | Update | PEM | parts list | We will need to order a few things for
our final setup.
1U box to place the heater |
|
|
13894
|
Tue May 29 16:22:43 2018 |
Kira | Update | PEM | parts list | I've updated the parts list to be an
excel document and included every single
part we will need. This is ony a first draft |
|
|
13895
|
Tue May 29 16:33:04 2018 |
Steve | Update | PEM | air cond filters replaced | Chris replaced some air condition filters
and ordered some replacement filter today.
|
|
|
13899
|
Wed May 30 23:57:08 2018 |
gautam | Update | PEM | Burning smell in office area / control room | [koji, gautam]
We noticed quite a strong burning
smell in the office area and control room |
|
|
13903
|
Thu May 31 15:48:16 2018 |
Kira | Update | PEM | running PID script with seismometer | I have attached the result of running the
PID script on the seismometer with the can
on. The daily fluctuations are no more than |
|
|
13922
|
Wed Jun 6 15:12:29 2018 |
Kira | Update | PEM | parts from lab | Got this 1U box from the Y arm that we
could potentially use (attachment 1). It
doesn't have handles on the front but |
|
|
13964
|
Thu Jun 14 15:24:32 2018 |
Steve | Update | PEM | ADC DAC In Line Test Boards are in | We have 6 of these boards now in cabinet
E7
|
|
|
13979
|
Mon Jun 18 11:12:23 2018 |
Kira | Summary | PEM | finishing up work at the lab | Since I am finishing my job at the lab,
I have stored all my electronics in a box
(attachment 1) and placed it under the table |
|
|
13990
|
Wed Jun 20 09:16:56 2018 |
Steve | Update | PEM | dusty lab | You should wipe off the table cover before
you take it off next time.
It is important to turn up the |
|
|
14001
|
Thu Jun 21 23:59:12 2018 |
shruti | Update | PEM | Seismometer temp control | We (Rana and I) are re-assembling the temperature
controls on the seismometer to attempt PID
control and then improve it using reinforcement |
|
|
14016
|
Mon Jun 25 22:27:57 2018 |
shruti | Update | PEM | Seismometer temp control - heater circuit | After removing all the clamping screws
from the heater circuit board, I soldered
the wire connecting IRF630 to the output |
|
|
14030
|
Thu Jun 28 11:05:48 2018 |
shruti | Update | PEM | Seismometer temp control equipment | Earlier today I cleared up most of the
equipment at the X end near the seismometer
to make the area walkable. |
|
|
14113
|
Sun Jul 29 20:03:02 2018 |
rana | Update | PEM | Seismometer temp control | While Shruti is re-building Kira's
heater circuit, I looked up how to do one
of these (i.e. what does a real EE say about |
|
|
14185
|
Mon Aug 27 09:14:45 2018 |
Steve | Update | PEM | small earth quakes | Small earth quakes and suspensions. Which
one is the most free and most sensitive:
ITMX |
|
|
14186
|
Tue Aug 28 15:29:19 2018 |
Steve | Frogs | PEM | Rat is cut | The rat is cut by mechanical trap and it
was removed from ITMX south west location.
A nagy kover patkanyt a fogo elkapta |
|
|
14266
|
Fri Nov 2 10:24:20 2018 |
Steve | Update | PEM | roof cleaning | Physical plan is cleaning our roof and
gutters today. |
|
|
14321
|
Tue Nov 27 10:50:20 2018 |
Steve | Update | PEM | earth quake Mexico | Nothing tripped.
|
|
|
14323
|
Thu Nov 29 08:13:33 2018 |
Steve | Update | PEM | EQ 3.9m So CA | EQ did not trip anything. atm1
Just
a REMINDER:
our vacuum system is at atm to help the vacuum |
|
|
14949
|
Tue Oct 8 08:08:18 2019 |
gautam | Update | PEM | PEM BLRMS anomaly | Yesterday, Koji and I noticed (from the
wall StripTool traces) that the vertex seismometer
RMS between 0.1-0.3 Hz in the X-direction |
|
|
14989
|
Wed Oct 23 11:49:21 2019 |
gautam | Update | PEM | PEM BLRMS anomaly | I looked into the seismometer situation
a bit more today. Here is the story so far
- I think more investigation is required: |
|
|
14992
|
Thu Oct 24 18:37:15 2019 |
gautam | Update | PEM | T240 checkout | Summary:
The Trillium T240 seismometer
needs |
|
|
15013
|
Tue Nov 5 12:37:50 2019 |
gautam | Update | PEM | T240 interface unit pulled out | I removed the Trillium T240 DAQ interface
unit from 1X4 for investigation.
It |
|
|
15022
|
Wed Nov 13 19:34:45 2019 |
gautam | Update | PEM | Follow-up on seismometer discussion | Attachment
#1 shows the spectra |
|
|
15023
|
Wed Nov 13 20:15:56 2019 |
rana | Update | PEM | Follow-up on seismometer discussion | this
is due to the Equivalence Principle: local |
|
|
15024
|
Wed Nov 13 23:40:15 2019 |
gautam | Update | PEM | Follow-up on seismometer discussion | Here is some disturbance
in the spacetime curvature, where the local |
|
|
15025
|
Thu Nov 14 12:11:04 2019 |
rana | Update | PEM | Follow-up on seismometer discussion | at 1 Hz' this effect is not large so
that's real translation. at lower frequencies
a ground tilt couples to the horizontal sensors |
|
|
15027
|
Fri Nov 15 00:18:41 2019 |
rana | Update | PEM | Follow-up on seismometer discussion | The large ground motion at 1 Hz started
up again tonight at around 23:30. I walked
around the lab and nearby buildings with |
|
|
15030
|
Fri Nov 15 12:16:48 2019 |
gautam | Update | PEM | Follow-up on seismometer discussion | Attachment
#1 is a spectrogram |
|
|
15032
|
Mon Nov 18 14:32:53 2019 |
gautam | Update | PEM | Follow-up on seismometer discussion | The nightly seismic activity enhancement
continued during the weekend. It always shows
up around 10pm local time, persists for ~1 |
|
|
15036
|
Tue Nov 19 21:53:57 2019 |
gautam | Update | PEM | Follow-up on seismometer discussion | The shaking started earlier today than
yesterday, at ~9pm local time.
While the IFO is shaking, I thought |
|
|
15082
|
Fri Dec 6 17:49:46 2019 |
rana | Summary | PEM | Jump test of seismometers: EX needs recentering | Yehonathan, |
|
|
15083
|
Sun Dec 8 20:15:41 2019 |
rana | Summary | PEM | Jump test of seismometers: EX needs recentering | I have re-centered the EX (and EY) seismometers.
They are Guralp CMG40-T, and have no special
centering procedure except cycling the power |
|
|
15086
|
Mon Dec 9 13:08:24 2019 |
Yehonathan | Summary | PEM | Jump test of seismometers: EX needs recentering | I check the seismometers in the last 14
hours (Attached). Seems like the coherenece
is restored in the x direction. |
|
|
15162
|
Tue Jan 28 08:26:53 2020 |
rana | Frogs | PEM | shaking | https://breakthrough.caltech.edu/magazine/2019-aug/#article-Listening-with-Light
|
|
|
15313
|
Fri Apr 24 00:26:59 2020 |
rana | Summary | PEM | L.A. EQ from Tuesday night | |
|
|
15445
|
Wed Jul 1 12:50:40 2020 |
gautam | Update | PEM | MC1 accelerometers plugged in | I re-connected the 3 accelerometers located
near the MC1/MC3 chamber. It was a bit tedious
to get the cabling sorted - I estimate the |
|
|
15634
|
Mon Oct 19 15:40:02 2020 |
Koji | Update | PEM | Alaska EQ M7.5 | Alaska M7.5 20:54UTC https://earthquake.usgs.gov/earthquakes/eventpage/us6000c9hg/executive
I looked at the suspensions. The |
|
|
15642
|
Fri Oct 23 19:01:57 2020 |
Koji | Summary | PEM | PSL Particle Counter kit removed from the table | The particle counter on the 40m PSL was
removed. The package was made together with
the OMC lab particle counter (see the packing |
|
|
15863
|
Thu Mar 4 15:48:26 2021 |
Koji | Summary | PEM | Watchdog tripped, Optics damped back | EQs seen on Summary pages
https://nodus.ligo.caltech.edu:30889/detcharsummary/day/20210304/pem/seismic_blrms/ |
|
|
16214
|
Fri Jun 18 14:53:37 2021 |
Anchal | Summary | PEM | Temperature sensor network proposal | I propose we set up a temperature sensor
network as described in attachment 1.
Here there are two types of units: |
|
|
16323
|
Mon Sep 13 17:05:04 2021 |
Tega | Summary | PEM | Infrasensing temperature sensor modbus configuration | Anchal mentioned it would be good to put
more details about how I arrived at the values
needed to configure the modbus drive for |
|
|
16329
|
Tue Sep 14 17:19:38 2021 |
Paco | Summary | PEM | Excess seismic noise in 0.1 - 0.3 Hz band | For the past couple of days the 0.1 to
0.3 Hz RMS seismic noise along BS-X has increased.
Attachment 1 shows the hour trend in the |
|
|
16331
|
Tue Sep 14 19:12:03 2021 |
Koji | Summary | PEM | Excess seismic noise in 0.1 - 0.3 Hz band | Looks like this increase is correlated
for BS/EX/EY. So it is likely to be real.
Comparison between 9/15 |
|
|
16416
|
Wed Oct 20 11:16:21 2021 |
Anchal | Summary | PEM | Particle counter setup near BS Chamber | I have placed a GT321 particle counter
on top of the MC1/MC3 chamber next to the
BS chamber. The serial cable is connected |
|
|
16420
|
Thu Oct 21 11:41:31 2021 |
Anchal | Summary | PEM | Particle counter setup near BS Chamber | The particle count channel names were changes
yesterday to follow naming conventions used
at the sites. Following are the new names: |
|