| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
12856
|
Tue Feb 28 18:25:22 2017 |
rana | Update | PEM | ETMX damping recovered | Huh? So should we ask them to put the container
back? Or do you have some other theory about
ETMX tripping that is not garbage related? |
|
|
12855
|
Tue Feb 28 08:04:48 2017 |
steve | Update | PEM | ETMX damping recovered | ETMX sus damping recovered.
Note: The giant metal garbage container
was moved from the south west corner of CES |
|
|
12854
|
Tue Feb 28 01:28:52 2017 |
johannes | Update | Computers | c1psl un-bootable | It turned out the 'ringing' was
caused by the respective other ETM still
being aligned. For these reflection measurements |
|
|
12853
|
Mon Feb 27 15:33:10 2017 |
Steve | Update | VAC | RGA scan at day 130 | Valve configuration: vacuum normal
Vacuum envelope: 23.5 C
RGA head: 46.6 C |
|
|
12852
|
Fri Feb 24 20:38:01 2017 |
johannes | Update | Computers | c1psl boot-stall culprit identified | [Gautam, Johannes]
c1psl finally booted up again,
PMC and IMC are locked. |
|
|
12851
|
Thu Feb 23 19:44:48 2017 |
johannes | Update | Computers | c1psl un-bootable | Yes, that was one of the things that I
wanted to look into. One thing Gautam and
I did that I didn't mention was to reconnect |
|
|
12850
|
Thu Feb 23 18:52:53 2017 |
rana | Update | Computers | c1psl un-bootable | The fringes seen on the oscope are mostly
likely due to the interference from multiple
light beams. If there are laser beams hitting |
|
|
12849
|
Thu Feb 23 15:48:43 2017 |
johannes | Update | Computers | c1psl un-bootable | Using the PDA520 detector on the AS port
I tried to get some better estimates for
the round-trip loss in both arms. While setting |
|
|
12848
|
Thu Feb 23 14:50:26 2017 |
Steve | Update | General | USB microscope returned | The microscope shipped back to the vendor
for credit yesterday.
|
|
|
12847
|
Thu Feb 23 10:59:53 2017 |
gautam | Update | COC | RC folding mirrors - coating optimization | I've now made
a |
|
|
12846
|
Thu Feb 23 09:32:20 2017 |
Koji | Update | SUS | wire standoffs update | Kyle took high quality images of
the three sapphire prisms using the microscope
@Downs. He analyzed the images to see the |
|
|
12845
|
Wed Feb 22 10:16:54 2017 |
rana | Summary | General | Alternative Calibration Scheme | OK, but the questions still stands: " |
|
|
12844
|
Wed Feb 22 08:54:17 2017 |
steve | Update | PEM | PSL enclousure particle count | ETMX sus damping recovered. PSL enclousure
is dusty at 20V rotation speed. Rainy days
as outside condition. |
|
|
12843
|
Tue Feb 21 17:05:14 2017 |
Steve | Update | General | Projector lamp replaced | This bulb was
blown out on Feb 4, 2017 after 2 months
of operation. |
|
|
12842
|
Tue Feb 21 13:51:35 2017 |
Craig | Summary | General | Alternative Calibration Scheme | We get SNR in two ways: the amplitude of
applied force and the integration time.
So we are limited in two ways: stability |
|
|
12841
|
Tue Feb 21 10:08:35 2017 |
steve | Update | PEM | noisy morning | Our new janitor Francisco is started working
in IFO room today.
|
|
|
12840
|
Sat Feb 18 21:50:48 2017 |
gautam | Update | IMC | WFS servos turned back on | Here is a comparison |
|
|
12839
|
Sat Feb 18 14:09:06 2017 |
rana | Update | IMC | WFS servos turned back on | Yikes. Please change the all teh WFS
DQ channels sample rates from 2048 down to
512 Hz. I doubt we ever need anything about |
|
|
12838
|
Fri Feb 17 20:10:18 2017 |
gautam | Update | IMC | WFS servos turned back on | [Koji, gautam]
Turns
out the "problem" with WFS2 and |
|
|
12837
|
Fri Feb 17 20:04:43 2017 |
Koji | Update | General | Projector not functional / Zita partially working | Koji, Gautam, Johannes
We quickly checked the situation
of the projector in the control room. |
|
|
12836
|
Fri Feb 17 10:56:12 2017 |
steve | Update | PEM | particle counter moved into PSL enclousure | The MET#1 particle counter was moved from
CES wall at ITMX to PSL enclousure south
west corner at 11am. |
|
|
12835
|
Thu Feb 16 21:55:47 2017 |
rana | Summary | General | Alternative Calibration Scheme | Question for Craig: What does the SNR of
our lines have to be? IF we're only trying
to calibrate the actuator in the audio band |
|
|
12834
|
Thu Feb 16 13:29:38 2017 |
gautam | Summary | General | Alternative Calibration Scheme | Summary:
Craig and I have been trying to
put together a Simulink diagram of the proposed |
|
|
12833
|
Wed Feb 15 23:54:13 2017 |
gautam | Update | IMC | IMC saga continues... | Following
the discussion at the meeting today, I wanted
to finish up the WFS tuning and then hand |
|
|
12832
|
Wed Feb 15 22:21:12 2017 |
Lydia | Update | DAQ | panels and pcbs | This is already how it's hooked up.
The hole on the from that says +24 V is for
an indicator light. |
|
|
12831
|
Wed Feb 15 22:16:05 2017 |
Max Isi | Update | Summary Pages | New condor_q format | There has been a change in the default
format for the output of the condor_q command
at CIT clusters. This could be problematic |
|
|
12830
|
Wed Feb 15 09:06:13 2017 |
ericq | Update | DAQ | panels and pcbs | The amplifier unit should use the three
pin dsub connectors (3w3?) that we use on
many of the other units for DC power, and |
|
|
12829
|
Wed Feb 15 00:26:44 2017 |
Johannes | Update | DAQ | panels and pcbs | I finished designing the PCBs for the VME
crate back sides (see attached). The project
files live on the DCC now at https://dcc.ligo.org/LIGO-D1700058. |
|
|
12828
|
Tue Feb 14 10:43:06 2017 |
gautam | Bureaucracy | Equipment loan | Equipment to Cryo Lab | PZT |
|
|
12827
|
Mon Feb 13 19:44:55 2017 |
Lydia | Update | IMC | Front panel for 29.5 MHz amplifier box | I made a tentative front panel design for
the newly installed amplifier box. I used
this chassis |
|
|
12826
|
Mon Feb 13 17:39:45 2017 |
Ashley | Update | General | Preliminary Microphone Data Update |
Problems that have occurred since
my last post: All of the sudden, I was getting
very strange data that was very quiet and |
|
|
12825
|
Mon Feb 13 17:19:41 2017 |
yinzi | Configuration | | configuring ethernet for raspberry pi | Gautam and I were able to get the Raspberry
Pi up and running today, including being
able to ssh into it from the control room. |
|
|
12824
|
Mon Feb 13 13:34:44 2017 |
gautam | Update | IMC | IMC length loop - bad SMA cable replaced | I was a little confused why the In1 Gain
had to be as high as +10dB - before the changes
to the RF chain, we were using +27dB, and |
|
|
12823
|
Mon Feb 13 11:55:14 2017 |
rana | Update | IMC | IMC length loop - summary of changes | I would think that we want to fix
the I/Q orthog inside the demod board by
trimming the splitter. Mixing |
|
|
12822
|
Sun Feb 12 01:16:57 2017 |
gautam | Update | IMC | IMC length loop - summary of changes | 29.5 MHz RF Modulation Source
|
|
|
12821
|
Fri Feb 10 19:32:15 2017 |
Koji | Update | IMC | IMC Demod board | The input impedance of the mixer is not
constant. As the diode switches, it changes
dynamically. Because of this, the waveform |
|
|
12820
|
Fri Feb 10 18:21:21 2017 |
gautam | Update | IMC | IMC Demod board | Rana and I spent some time looking at the
IMC demod board earlier today. I will post
the details shortly, but there was a label |
|
|
12819
|
Fri Feb 10 13:24:28 2017 |
rana | Update | IMC | 29.5 MHz stabilizer box replacement | To remind myself about how to put filter
caps on the mini-circuits RF Amps, I looked
at Koji's recent |
|
|
12818
|
Fri Feb 10 13:04:32 2017 |
rana | Update | IOO | MC AutoLocker hung because c1iool0 asleep again | c1iool0 was down again. Rather than key
the crate, this time I just pushed the reset
button on the front and it came back. |
|
|
12817
|
Fri Feb 10 11:41:43 2017 |
Lydia | Update | IMC | 29.5 MHz stabilizer box replacement | To install the replacement amplifier, I
did the following:
Mounted the amplifier in |
|
|
12816
|
Fri Feb 10 02:14:10 2017 |
gautam | Update | IMC | 29.5 MHz stabilizer box replacement | Lydia finished up installing the new RF
amplifier, and will elog the details of the
installation. |
|
|
12815
|
Thu Feb 9 23:35:34 2017 |
gautam | Update | IMC | MCL Feedback - TF measurements | Here are the details as promised.
Attachment #1: Updated
simulink model. Since I haven't actually |
|
|
12814
|
Thu Feb 9 11:22:56 2017 |
gautam | Update | General | Sorensens and DIN connections at 1X1 | I'd like to fix a few things at 1X1
when we plug in the new amplifier for the
29.5MHz modulation signal. |
|
|
12813
|
Thu Feb 9 08:03:08 2017 |
Steve | Update | General | USB microscope ordered | http://www.amscope.com/3-5x-180x-boom-stand-trinocular-zoom-stereo-microscope-with-144-led-ring-light-and-10mp-camera.html
will be ordered today. |
|
|
12812
|
Wed Feb 8 19:13:02 2017 |
gautam | Update | IMC | MCL Feedback - TF measurements | Quick summary elog, details to follow.
I did the following:
Updated the Simulink model |
|
|
12811
|
Wed Feb 8 10:16:39 2017 |
steve | Update | SUS | clipping ITMX oplev | The ITMX oplev beam is clipping. It will
be corected with locked arm
|
|
|
12810
|
Tue Feb 7 19:14:59 2017 |
Johannes | Update | CDS | vme crate backplane adapter board layout | After fighting with Altium for what seems
like an eternity I have finished putting
my vision of the vme crate backplane adapter |
|
|
12809
|
Tue Feb 7 17:00:55 2017 |
Lydia | Update | IMC | 29.5 MHz stabilizer box replacement | I set everything up and connected it as
shown on the block diagram attached to the
previous entry, with the exception |
|
|
12808
|
Tue Feb 7 16:23:49 2017 |
Steve | Update | General | power interruption tomorrow |
received this note: at 4:11pm Tuesday, Feb
7, 2017 |
|
|
12807
|
Tue Feb 7 12:01:10 2017 |
Lydia | Update | IMC | 29.5 MHz stabilizer box replacement | I tested the amplifier with the Agilent
network analyzer and measured 19.5 dB
of gain between 29 and 30 mHz. The phase |
|