| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
108
|
Wed Feb 23 18:04:38 2011 |
Aidan | Things to Buy | Delivery Note | First parts of Bosch framing have arrived from Valin |
|
|
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107
|
Fri Feb 18 14:53:50 2011 |
Phil | Laser | Laser | LTG laser delivering specified power | I got the LTG CO2 laser to deliver 50.02W
as measured by the Thorlabs 200W power head
today. This required running the Glassman |
|
|
106
|
Fri Feb 18 13:26:23 2011 |
Aidan | Things to Buy | Delivery Note | First parts of Bosch framing have arrived from Valin | The first pieces of the Bosch framing have
arrived from Valin Corporation. These are
just small pieces such as the fasteners and |
|
|
105
|
Tue Feb 8 13:02:26 2011 |
Aidan | Electronics | Delivery Note | Thorlabs S322C 200W power head arrived | The 200W Thermopile power head from
Thorlabs arrive today. The scanned delivery
note and calibration info are attached. |
|
|
104
|
Tue Jan 25 16:38:16 2011 |
Aidan | Electronics | Pre-amplifier | L1 TCSY ISS Board transfer function | I measured the AC and DC channel
transfer functions of the eLIGO L1 TCSY ISS
board for PD1 and PD2. The gain is quite |
|
|
103
|
Tue Nov 30 11:03:19 2010 |
Aidan | Computing | Frame Grabber | EDT frame grabber works under Ubuntu | The new machine in the TCS lab is running
Ubuntu. I installed the frame-grabber into
it and, after loading the configuration file |
|
|
102
|
Tue Nov 30 11:01:19 2010 |
Aidan | Computing | General | New workstation added in TCS Lab. New Static IP | I added a workstation at 10.0.1.26 in the
TCS lab. |
|
|
101
|
Tue Nov 23 06:15:08 2010 |
Won | Computing | Hartmann sensor | Image folder structure | Attached below is a diagram that describes
the organisation of image folders that I
am using at the moment with Run_initialize |
|
|
100
|
Thu Nov 4 13:31:19 2010 |
Won Kim | Computing | Hartmann sensor | Frame Grabber SDK installation | Appended
below is the step by step procedure that |
|
|
99
|
Tue Oct 5 12:51:16 2010 |
Aidan | Laser | Hartmann sensor | Variable power in two beams of cross-sampling experiment | The SLED in the cross-sampling experiment
produces unpolarized light at 980nm. So I
added a PBS after the output and then a HWP |
|
|
98
|
Mon Oct 4 19:44:03 2010 |
Aidan | Laser | Hartmann sensor | Cross-sampling experiment - two beams on HWS | I've set up the HWS with the probe beam
sampling two optics in a Michelson configuration
(source = SLED, beamsplitter = PBS cube). |
|
|
97
|
Wed Sep 29 16:49:36 2010 |
Aidan | Laser | Hartmann sensor | Cross-sampling experiment power budget | I've been setting up the cross-sampling
test of the Hartmann sensor, Right now I'm
waiting on a 50/50 BS so I'm improvising |
|
|
96
|
Tue Sep 28 17:53:40 2010 |
Aidan | Laser | Hartmann sensor | Crude alignment of cross-sampling measurement | I've set up a crude alignment of the cross-sampling
system (optical layout to come). This was
just a sanity check to make sure that the |
|
|
95
|
Tue Sep 28 10:41:32 2010 |
Aidan | Laser | Hartmann sensor | Aligning HWS cross-sample experiment - polarization issues | I'm in the process of aligning the cross-sampling
experiment for the HWS. I've put the 1"
PBS cube into the beam from the fiber-coupled |
|
|
94
|
Mon Sep 13 18:24:52 2010 |
Aidan | Laser | Hartmann sensor | Enclosure for the HWS | I've assembled the box Mindy ordered from
Newport that will house the Hartmann sensor.
It's mainly to reduce ambient light, air |
|
|
93
|
Mon Aug 23 08:43:16 2010 |
Aidan | Things to Buy | Laser | Bought a laser diode from Thorlabs for HWS | It arrived on Friday.
|
|
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92
|
Wed Aug 18 18:38:11 2010 |
Aidan | Computing | Hartmann sensor | Hartmann sensor code | I downloaded and tested revision
47 of the Adelaide Hartmann sensor code from
the SVN (https://trac.ligo.caltech.edu/Hartmann_Sensor/browser/users/won/HS_OO?rev=47). |
|
|
91
|
Tue Aug 17 22:34:14 2010 |
rana | Misc | General | ETM temperature after a 1W step | This attachment is a Shockwave Flash animation
of the iLIGO ETM getting a 1 W beam with
a 3.5 cm radius getting fully absorbed onto |
|
|
90
|
Tue Aug 17 16:31:55 2010 |
Aidan | Things to Buy | Laser | Bought a laser diode from Thorlabs for HWS | http://www.thorlabs.com/thorProduct.cfm?partNumber=CPS180
I bought this laser diode from Thorlabs
today to try the current modulation trick |
|
|
89
|
Mon Aug 9 10:58:37 2010 |
Aidan | Laser | SLED | SLED 15-day trend | Here's a plot of the 15-day output
of the SLED.
Currently there is an 980nm FC/APC |
|
|
88
|
Wed Aug 4 09:57:38 2010 |
Aidan, James | Computing | Hartmann sensor | RMS measurements with Hartmann sensor | [INCOMPLETE
ENTRY]
We set up the Hartmann sensor and |
|
|
87
|
Sat Jul 31 11:54:20 2010 |
Aidan | Computing | SLED | SLED Test Day 5 - Re-tuned current set-point control voltage | Main Points
Re-set SLED current set-point
control voltage to 0.111V
SLED |
|
|
86
|
Fri Jul 30 21:19:05 2010 |
Aidan | Computing | EPICS | Waveform Channel Access for storing centroids | After some discussion with Frank we figured
out how to edit the record type in HWS.db
so that the waveform/array channel actually |
|
|
85
|
Fri Jul 30 19:22:24 2010 |
Aidan | Computing | EPICS | Waveform Channel Access for storing centroids | A waveform channel was added to the
HWS softIoc on hartmann. This allows arrays
of data to be stored in a single channel. |
|
|
84
|
Fri Jul 30 13:38:39 2010 |
James Kunert | Computing | Hartmann sensor | Summary of Thermal Defocus Data Analysis | Below is a table summarizing the results
of recent thermal defocus experiments. The
values are the calculated change in measured |
|
|
83
|
Fri Jul 30 11:01:31 2010 |
Aidan | Computing | Hartmann sensor | EPICS softIoc alias | I added an alias HWSIoc to
controls which can be used to
start the HWS EPICS softIoc. |
|
|
82
|
Fri Jul 30 10:04:54 2010 |
Aidan | Computing | Hartmann sensor | Restarted the HWS EPICS channels | Restarted the HWS EPICS channels
on hartmann with the following
command: |
|
|
81
|
Thu Jul 29 10:09:19 2010 |
Aidan | Electronics | SLED | SLED long term test - Day 2 | I've attached the Acceptance Test Report
data from SUPERLUM for this SLED. I've also
determined the expected percentage decrease |
|
|
80
|
Wed Jul 28 18:32:12 2010 |
Aidan | Electronics | SLED | SLED long term test - Day 2 | Here's the data from the last 2 1/2 days
of running the SLED. The decrease in photo-current
measured by the on-board photo-detector is |
|
|
79
|
Tue Jul 27 08:31:10 2010 |
Aidan | Electronics | SLED | Long term SLED test - Day 1 | The measurement from the on-board
PD of the Superlum SLED seems to be falling.
This effect started around 5PM last night |
|
|
78
|
Mon Jul 26 18:47:12 2010 |
James K | Misc | Hartmann sensor | Hex Grid Analysis Errors and Thermal Defocus Noise | My previous eLog details how the noise
in Hartmann Sensor defocus measurements appears
to vary with ambient light. New troubleshooting |
|
|
77
|
Mon Jul 26 12:17:25 2010 |
Aidan | Electronics | Hartmann sensor | Added Indium to HWS | I added some 0.004" thick indium
sheet to the copper heat spreaders and and
the heat sinks on the side of the HWS to |
|
|
76
|
Mon Jul 26 09:42:30 2010 |
Aidan | Computing | SLED | Long term test on SLED started - Day 0 | I set up the SLED to test its long
term performance. The test began, after a
couple of false starts, around 9:15AM this |
|
|
75
|
Sun Jul 25 16:24:56 2010 |
Aidan | Computing | SLED | Superlum SLED test integrated with DAQ - new channel names | I added some new channels to the
Athena DAQ that record the diagnostic channels
from the Superlum SLED. |
|
|
74
|
Sat Jul 24 10:50:14 2010 |
Aidan | Electronics | Hartmann sensor | Lab Temperature and HWS temperature: pre-indium | Hour-long trend puts the lab temperature
at 19.51C
Dalsa temperature: |
|
|
73
|
Fri Jul 23 19:52:49 2010 |
Aidan | Computing | Hartmann sensor | Dalsa camera ADC 8th digitizer error | I've attached an image that shows the locations
of those pixels that record a number of counts
= (2*n-1)*128. |
|
|
72
|
Fri Jul 23 12:38:58 2010 |
Aidan | Computing | Hartmann sensor | Images for Dalsa | Attached are the background and 80% illumination
(~uniform spatially uniform) images that
Dalsa requested. |
|
|
71
|
Fri Jul 23 12:33:51 2010 |
Aidan | Computing | Hartmann sensor | Invar clamp scatter | I illuminated the Hartmann sensor with
the output of a fiber placed ~1m away.
I noticed that the illumination was |
|
|
70
|
Fri Jul 23 10:33:08 2010 |
Aidan | Computing | Hartmann sensor | Dalsa camera ADC 8th digitizer error | I plotted a histogram of the total intensity
of the Hartmann sensor when illuminated and
found that the 128 count problem extends |
|
|
69
|
Thu Jul 22 21:46:55 2010 |
James Kunert | Misc | Hartmann sensor | Hartmann Sensor Thermal Defocus Measurement Noise & Ambient Light Effects | As discussed during the teleconference,
a series of experiments have been conducted
which attempt to measure the thermally induced |
|
|
68
|
Thu Jul 22 11:02:59 2010 |
Aidan | Computing | General | Restarted hartmann machine | hartmann had started responding
to requests to log-in with the a request
to change the password. Attempts to change |
|
|
67
|
Tue Jul 20 18:13:06 2010 |
Aidan | Computing | General | Added TCS channels to frame builder | http://nodus.ligo.caltech.edu:8080/AdhikariLab/860
contents of tcs_daq: /target/TCS_westbridge.db |
|
|
66
|
Tue Jul 20 15:45:51 2010 |
Aidan | Computing | General | Add fixed IP addresses to local machines in TCS lab | http://nodus.ligo.caltech.edu:8080/AdhikariLab/859 |
|
|
65
|
Thu Jul 15 20:06:37 2010 |
James K | Misc | Hartmann sensor | SURF Log: Thermally Induced Defocus Experiments | A quick write-up on recent work can be
found at: Google
Docs |
|
|
64
|
Tue Jul 6 21:57:19 2010 |
James Kunert | Misc | Hartmann sensor | SURF Log -- SLED fiber output temporal analysis | In the previous log, I describe the direct
measurement of the fiber output beam using
the Hartmann sensor with the plate removed. |
6x |
|
63
|
Sun Jul 4 06:45:50 2010 |
Kathryn and Won | Computing | Hartmann sensor | analyzing the wavefront aberration | Happy
Fourth of July!
|
|
|
62
|
Thu Jul 1 09:40:13 2010 |
James Kunert | Misc | Hartmann sensor | SURF Log 8 -- more SLED characterization | As I started setting up my next experiment,
I noticed that the beam size from the SLED
appeared to be larger than expected from |
8x |
|
61
|
Wed Jun 30 00:00:13 2010 |
Kathryn and Won | Computing | Hartmann sensor | rms of centroid position changes | Given
below is a brief overview of calculating
rms of spot position changes to test the |
|
|
60
|
Fri Jun 25 10:59:43 2010 |
Aidan | Misc | aLIGO Modeling | Uploaded aLIGO axicon+ITM COMSOL model to the 40m SVN | Here are the results in the annulus thickness
vs annulus diameter space ...
|
|
|
59
|
Fri Jun 25 10:47:08 2010 |
Aidan | Misc | aLIGO Modeling | Uploaded aLIGO axicon+ITM COMSOL model to the 40m SVN | I added a COMSOL model of the aLIGO ITM
being heated by an axicon-formed annulus
to the 40m SVN. The model assumes a fixed |
|