ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13847
|
Tue May 15 22:11:38 2018 |
gautam | Update | General | IFO maintenance | Since there have been various software/hardware
activity going on (stack weighing, AUX laser
PLL, computing timing errors etc etc), I |
|
|
13848
|
Wed May 16 18:52:50 2018 |
gautam | Configuration | Electronics | PLL mysteries solved | [Koji,
Gautam]
Summary: |
|
|
13849
|
Wed May 16 21:02:22 2018 |
Kevin | Update | PEM | ADC common mode rejection with new seismometer connections | As described in this
elog, the ADC for the seismometers now
has the signals wired directly to the ADC |
|
|
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, |
|
|
13851
|
Thu May 17 09:14:38 2018 |
Steve | Update | General | Stack measurement setup decommissioned | The final set-up of stack measurment with
3 load
cells and 4 leveling |
|
|
13852
|
Thu May 17 11:56:37 2018 |
gautam | Update | General | EPICS process died on c1ioo | The EPICS process on the c1ioo front
end had died mysteriously. As a result, MC |
|
|
13858
|
Thu May 17 13:51:35 2018 |
Jon Richardson | Configuration | Electronics | Documentation & Schematics for AUX-PSL PLL | [Jon, Gautam]
Attached is supporting documentation
for the AUX-PSL PLL electronics installed |
|
|
13859
|
Thu May 17 15:38:19 2018 |
Kira | Update | PEM | test setup with seismometer | I've moved my setup to the actual seismometer.
I attached the temperature sensor to the
seismometer (attachment 1) with duct tape, |
|
|
13860
|
Thu May 17 18:05:01 2018 |
gautam | Update | SUS | SR785 near 1X5 | I'm working near 1X5 and there is an
SR785 adjacent to the electronics rack with
some cabling running along the floor. I plan |
|
|
13861
|
Fri May 18 07:41:01 2018 |
steve | Update | SUS | clipping ITMX oplev | The ITMX oplev
still clipping
|
|
|
13862
|
Fri May 18 09:13:41 2018 |
Pooja | Update | SUS | Colored GigE image | To obtain a colored version with good contrast
of the grayscale image of scattering of light
by dust particles on the surface of test |
|
|
13863
|
Fri May 18 14:18:03 2018 |
gautam | Configuration | Electronics | Basic MEDM Control Screen setup | I setup a basic MEDM screen for remote
control of the PLL.
The Slow control voltage slider |
|
|
13864
|
Fri May 18 14:33:34 2018 |
Kira | Update | PEM | test setup with seismometer | Here is the result of my test. I think
I'll leave the can on over the weekend
because there's a long period of time |
|
|
13865
|
Fri May 18 18:14:18 2018 |
Udit Khandelwal | Summary | General | Summary 05/18/2018 | Tip-Tilt Suspension Design:
Designed a new ECD plate and
changed dimensions of the side arms after |
|
|
13866
|
Fri May 18 19:10:48 2018 |
keerthana | Update | General | Code for adjusting the oscillator frequency remotly | Target: Phase locking
can be acheived by giving a scan to the oscilator
frequency. This frequency is now controlled |
|
|
13867
|
Fri May 18 19:59:55 2018 |
Jon Richardson | Configuration | Electronics | AUX-PSL PLL Characterization Measurements | Below is analysis of measurements
I had taken of the AUX-PSL PLL using an SR560
as the servo controller (1 Hz single-pole |
|
|
13868
|
Fri May 18 20:03:14 2018 |
Pooja | Update | Cameras | Telescopic lens solution for GigE | Aim: To find telescopic lens solution to
image test mass onto the sensor of GigE camera.
I wrote a python code to find an |
8x |
|
13869
|
Sun May 20 17:43:01 2018 |
rana | Update | Electronics | How to choose resistors | Article
from EE Times, describing why metal foil
(NOT metal film) resistors are really better |
|
|
13870
|
Sun May 20 23:43:50 2018 |
gautam | Update | IOO | Coil driver noise re-measurement | Summary:
In the IMC actuation chain, it
looks like the MC1/MC3 |
|
|
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 |
|
|
13873
|
Mon May 21 15:34:19 2018 |
gautam | Configuration | Electronics | Channel hijacking history | Since we've been hijacking channels
like there is no tomorrow for the AUX-PLL
setup, I'm documenting the channel names |
|
|
13874
|
Mon May 21 17:36:00 2018 |
pooja | Update | Cameras | GigE camera image of ETMX | Today Steve and I tried to to capture the
image of scattering of light by dust particles
on the surface of ETMX using GigE camera. |
|
|
13875
|
Mon May 21 18:02:55 2018 |
keerthana | Update | General | Testing of the new mini-circuits frequency counter | Today, I tested the new mini-circuit frequency
counter by connecting it with the beat signal
output. The frequency counter works fine. |
|
|
13876
|
Tue May 22 10:14:39 2018 |
Jon Richardson | Configuration | Electronics | Documentation & Schematics for AUX-PSL PLL |
|
|
|
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. |
|
|
13878
|
Tue May 22 17:26:25 2018 |
gautam | Update | IOO | MC1 Coil Driver pulled out | I have pulled out MC1
coil driver board from its Eurocrate, so |
|
|
13879
|
Tue May 22 17:29:27 2018 |
keerthana | Update | elog | MEDM Diagram for the auxilary laser system control and display. | (keerthana, gautam, jon)
In the morning, Jon gave me an
overview of the Auxiliary laser system which |
|
|
13880
|
Tue May 22 23:28:01 2018 |
gautam | Update | IOO | MC1 Coil Driver pulled out | This work is now complete.
MC1 coil driver board has been reinstalled, |
|
|
13881
|
Wed May 23 00:45:18 2018 |
johannes | Configuration | General | AS port laser injection | I was planning to set up the additions
to the AS table that are outlined in Attachment
#1. Unfortunately the beam is too large for |
|
|
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 |
|
|
13883
|
Wed May 23 17:58:48 2018 |
gautam | Update | IOO | MC1 Coil Driver pulled out |
Marked up schematic + photo post
changes uploaded to DCC
page.
There was a capacitor |
|
|
13884
|
Wed May 23 19:24:37 2018 |
Udit Khandelwal | Summary | General | Summary 05/23/2018 | Tip-Tilt Redesign Project with
Koji:
Did |
|
|
13885
|
Thu May 24 10:16:29 2018 |
gautam | Update | General | All models on c1lsc frontend crashed | All models on the c1lsc
front end were dead. Looking at slow trend |
|
|
13886
|
Thu May 24 13:06:17 2018 |
gautam | Configuration | ALS | DFD noises | Summary:
The DFD noise floor is
~0.5Hz/rtHz |
|
|
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 |
|
|
13889
|
Thu May 24 19:41:28 2018 |
gautam | Configuration | ALS | BeathMouth reinstalled on PSL table | Summary:
DC light power incident
on beat PD is |
|
|
13890
|
Thu May 24 20:31:03 2018 |
gautam | Configuration | ALS | DFD noises | A
couple of months ago, I took 21 measurements
of the delay line transfer function. As shown |
|
|
13891
|
Fri May 25 13:06:33 2018 |
Jon Richardson | Configuration | Electronics | Improved Measurements of AUX-PSL PLL | Attached are gain-variation measurements
of the final, in situ AUX-to-PSL phase-locked
loop (PLL). |
|
|
13893
|
Fri May 25 14:55:33 2018 |
Jon Richardson | Update | Cameras | Status of GigE Camera Software Fixes | There is an effort to switch to an all-digital system
for the GigE camera feeds similar to the
one running at LLO, which uses Joe Betzwieser's |
|
|
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.
|
|
|
13896
|
Wed May 30 10:17:46 2018 |
gautam | Update | IOO | MC1 Coil Driver pulled out | [rana,gautam]
Summary:
Last night, Rana fact-checked my |
|
|
13897
|
Wed May 30 12:13:13 2018 |
rana | Update | Computers | NODUS: rsyncd + frames | To get our rsync back to LDAS back up,
I followed instructions from Dan Kozak:
|
|
|
13898
|
Wed May 30 16:12:30 2018 |
Jonathan Hanks | Summary | CDS | Looking at c1oaf issues | When c1oaf starts up there are 446 gain
channels that should be set to 0.0 but which
end up at 1.0. An example channel is |
|
|
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 |
|
|
13900
|
Thu May 31 02:04:55 2018 |
johannes | Update | PSL | AUX laser state of mind | The AUX laser is down to 5.4 mW output
power |
|
|
13901
|
Thu May 31 10:19:42 2018 |
gautam | Update | SUS | MC3 glitchy | Seems like as a result of my recent poking
around at 1X6, MC3 is more glitchy than usual
(I've noticed that the IMC lock duty |
|
|
13902
|
Thu May 31 15:36:59 2018 |
gautam | Update | General | New camera channels | Jon informed me that there are some EPICS
channels that JoeB's camera server code
looks for that don't exist. I thought |
|