| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
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 |
|
|
51
|
Thu Jun 17 07:40:07 2010 |
James K | Misc | Hartmann sensor | SURF Log -- Day 1, Getting Started | For Wednesday, June 16: |
|
|
52
|
Thu Jun 17 22:03:51 2010 |
James K | Misc | Hartmann sensor | SURF Log -- Day 2, Getting Started | For Thursday, June 17:
Today I attended a basic laser safety
training orientation, the second Introduction |
|
|
53
|
Sat Jun 19 17:31:46 2010 |
James K | Misc | Hartmann sensor | SURF Log -- Day 3, Initial Image Analysis | |
7x |
|
54
|
Tue Jun 22 00:21:47 2010 |
James K | Misc | Hartmann sensor | Surf Log -- Day 4, Hartmann Spot Flickering Investigation | I started out
the day by taking some images from the CCD |
7x |
|
55
|
Tue Jun 22 22:30:24 2010 |
James K | Misc | Hartmann sensor | SURF Log -- Day 5, more Hartmann image preliminary analysis | Today I spoke with Dr. Brooks and
got a rough outline of what my experiment
for the next few weeks will entail. I'll |
13x |
|
57
|
Wed Jun 23 22:57:22 2010 |
James K | Misc | Hartmann sensor | SURF Log -- Day 6, Centroiding | So in addition to taking steps towards
starting to set stuff up for the experiment
in the lab, I spent a good deal of the day |
10x |
|
58
|
Fri Jun 25 00:11:13 2010 |
James K | Misc | Hartmann sensor | SURF Log -- Day 7, SLED Beam Characterization |
|
|
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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 |
|
|
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 |
|
|
253
|
Thu Jun 23 10:53:17 2022 |
JC | Lab Infrastructure | General | Seat For Photodiode Testing | [JC, Chub, Radhika]
Chub and I ordered a few parts
from McMaster in order build a handrail-like |
|
|
255
|
Wed Jul 13 15:19:49 2022 |
JC | Electronics | General | Desktop Computer | [JC]
The desktop computer is now running
Debian Linux |
|
|
4
|
Tue Dec 29 16:05:09 2009 |
Frank | Computing | DAQ | booting VME crates from fb1 | http://nodus.ligo.caltech.edu:8080/AdhikariLab/514 |
|
|
232
|
Mon Jul 22 18:44:53 2019 |
Edita Bytyqi | Things to Buy | General | Need to Order Gloves | Small/Medium size gloves need to be ordered
in order to handle the optics carefully. |
|
|
233
|
Mon Jul 22 18:46:23 2019 |
Edita Bytyqi | Lab Infrastructure | | Laser-Lens-HWS Setup | Today, I set up a system consisting of
the 520 nm laser, a 2'' mirror and
two lenses of focal lengths f1 = 40 cm and |
|
|
234
|
Wed Jul 24 16:25:13 2019 |
Edita Bytyqi | Lab Infrastructure | Optics | Updated 2-lens setup | The previous 2-lens setup focused the beam
to a tight spot, however due to the divergence
angle of the laser beam, a significant amount |
|
|
236
|
Mon Jul 29 18:53:16 2019 |
Edita Bytyqi | Lab Infrastructure | Optics | Mounted Reflector and Heater | Since we set up the 2-lens system focusing
the laser beam to the CCD, the next step
was to mount the spherical reflector (31 |
|
|
237
|
Thu Aug 1 15:20:39 2019 |
Edita Bytyqi | Lab Infrastructure | Optics | Reflector Mount and DC Supply | Yesterday, we were able to take some data
using the 120 V DC power supply. The reflectors
cut at the focal point and radius were both |
|
|
240
|
Mon Aug 12 21:15:12 2019 |
Edita Bytyqi | Electronics | | Determining heater/reflector focus | I took images of the heat pattern projected
on a piece of paper produced by the semi-circle
reflector. I used 108V to drive current throught |
|
|
241
|
Fri Aug 16 17:05:14 2019 |
Edita Bytyqi | Electronics | | FLIR Images of new reflector focusing heat | We got 11 new semi-circle cut reflectors
of radius ~3.6 cm. I glued a screw to the
back of one reflector using the same epoxy |
|
|
110
|
Thu Feb 24 10:23:31 2011 |
Christopher Guido | Laser | Laser | LTG initial noise | Cheryl Vorvick, Chris Guido, Phil Willems
Attached is a PDF with some initial
noise testing. There are 5 spectrum plots |
|
|
215
|
Tue Jul 10 17:49:13 2018 |
Aria Chaderjian | Laser | General | July 10, 2018 | Went down to the lab and showed Rana the
setup. He's fine with me being down there
as long as I let someone know. He also recommended |
|
|
216
|
Thu Jul 12 18:48:21 2018 |
Aria Chaderjian | Laser | General | July 12, 2018 | The beam reflecting off the test mirror
was clipping the lens between gold mirror
and test mirror, so I reconfigured some of |
|
|
217
|
Fri Jul 13 16:42:50 2018 |
Aria Chaderjian | Laser | General | July 13, 2018 | The table is set up. The HWS and SLED were
moved slightly, and a minimal angle between
the test mirror and HWS was achieved. |
|
|
218
|
Mon Jul 23 10:04:19 2018 |
Aria Chaderjian | Laser | General | July 20, 2018 | With Jon's help, I changed the setup
to include a mode-matching telescope built
from the f=60mm (1 inch diameter) lens and |
|
|
219
|
Tue Jul 24 16:52:44 2018 |
Aria Chaderjian | Laser | General | July 23, 2018 and July 24, 2018 | Attached the grid array of the HWS.
Applied voltage (5V, 7V, 9.9V,
14V) to the heater pad and took measurements |
|
|
220
|
Fri Aug 3 15:46:12 2018 |
Aria Chaderjian | Laser | General | August 3, 2018 | To the best of my ability, calculated the
magnification of the plane of the test optic
relative to the HWS (2.3) and input this |
|
|
157
|
Tue Jun 5 17:25:43 2012 |
Alex Mauney | Misc | aLIGO Modeling | 6/5/12 Daily Summary | - Had a meeting to talk about the basics
of LIGO (esp. TCS) and discuss the project
- Created COMSOL model for the test |
|
|
158
|
Wed Jun 6 16:54:09 2012 |
Alex Mauney | Misc | aLIGO Modeling | 6/6/12 Daily Summary | - Got access to and started working with
SIS on Rigel1
- Fixed SVN issues |
|
|
160
|
Thu Jun 7 16:50:16 2012 |
Alex Mauney | Misc | aLIGO Modeling | 6/7/12 Daily Summary | - Created a COMSOL model with thermal deformations
- Added non-symmetrical heating to
cause astigmatism |
|
|
162
|
Fri Jun 8 16:36:47 2012 |
Alex Mauney | Misc | aLIGO Modeling | 6/8/12 Daily Summary | - Tried to fix COMSOL error using the (ts)
module, ended up emailing support as the
issue is new in 4.3 |
|
|
164
|
Mon Jun 11 17:11:01 2012 |
Alex Mauney | Misc | aLIGO Modeling | 6/11/12 Daily Summary | - Fixed the (ts) model, got strange results
that indicate that the antisymmetric heating
mode is much more prominent than previously |
|
|
166
|
Wed Jun 13 16:36:14 2012 |
Alex Mauney | Misc | aLIGO Modeling | 6/12 and 6/13 Daily Summary | - Realized that the strange deformations
that we were seeing only occur on the face
nearest the ring heater, and not on the face |
|
|
168
|
Thu Jun 14 16:51:03 2012 |
Alex Mauney | Misc | aLIGO Modeling | 6/14/12 Daily Summary | - Plugged the output of the model with
uniform heating into SIS using both modification
of the radius of curvature, and direct importation |
|
|
169
|
Mon Jun 18 16:30:36 2012 |
Alex Mauney | Misc | aLIGO Modeling | 6/18/12 Daily Summary | - Verified that the SIS output does match
satisfy the equations for Gaussian beam propagation
- Investigated how changing the amount |
|
|
171
|
Tue Jun 19 16:24:52 2012 |
Alex Mauney | Misc | aLIGO Modeling | 6/19/12 Daily Summary | - Did more modeling for different levels
of heating and different mesh densities for
the SIS input. |
|
|
172
|
Wed Jun 20 16:44:58 2012 |
Alex Mauney | Misc | aLIGO Modeling | 6/20/12 Daily Summary | - Attended a lot of meetings (Safety, LIGO
Orientation)
- Finished draft of week 3 report |
|
|
174
|
Thu Jun 21 16:54:45 2012 |
Alex Mauney | Misc | aLIGO Modeling | 6/21/12 Daily Summary | - Paper edits and more data generation
for the paper (lower resolution grid data)
- Attended a talk on LIGO |
|
|
177
|
Wed Jun 27 16:43:56 2012 |
Alex Mauney | Misc | aLIGO Modeling | 6/27/12 Daily Summary | Plan for building the model
- Find the fields that would be incident
on the beam splitter from each arm (This |
|
|
178
|
Thu Jun 28 16:27:37 2012 |
Alex Mauney | Misc | aLIGO Modeling | 6/28/12 Daily Summary | - Finished the MatLab code that both combines
two fields and simulates the adjustment of
the beamsplitter to minimize the power out |
|
|
180
|
Mon Jul 9 16:54:17 2012 |
Alex Mauney | Misc | aLIGO Modeling | 7/9/12 Summary | Made a COMSOL model that can include CO2
laser heating, self heating, and ring heating
Figured out how to run SIS out of |
|
|
251
|
Wed May 11 19:46:21 2022 |
Aidan, Radhika, Jordan | Lab Infrastructure | Vacuum chamber | Leak cleaning on IR labs vacuum chamber - suspects | [Aidan, Jordan, Radhika]
Radhika and Jordan identified some
particulates (hair and flecks of foil) on |
|
|
142
|
Mon Apr 25 16:28:27 2011 |
Aidan, Joe | Computing | Network architecture | Fixed problem network drive fb1:/cvs on Ubuntu & CentOS machines | With Joe's help we fixed the failure of
princess_sparkle to mount the
fb1:/cvs directory when relying |
|
|
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 |
|
|
1
|
Fri Nov 6 20:09:47 2009 |
Aidan | Laser | Laser | Test | Does this work? |
|
|
3
|
Mon Dec 28 14:48:29 2009 |
Aidan | Computing | DAQ | VME crate has a "new" CPU - needs to be configured | I installed a recycled VME crate in the
electronics rack. It currently has a Baja
4700E CPU card in it - and this needs to |
|
|
5
|
Tue Dec 29 17:50:57 2009 |
Aidan | Computing | DAQ | VME crate has proper boot settings | We fixed the start-up settings on the VME
crate to look for a TCS startup file on fb0.
The settings on the Baja 4700 are now: |
|
|
6
|
Fri Jan 29 10:02:15 2010 |
Aidan | Computing | DAQ | New DAQ ordered | On the advice of Ben Abbott, I've
ordered the Diamond Systems Athena II computer
w/DAQ, as well as an I/O board, solid state |
|
|
7
|
Thu Feb 4 14:05:59 2010 |
Aidan | Electronics | Ring Heater | Ring heater transfer function measurement 240mHz-5Hz | I've been trying to measure the ring heater
transfer function (current to emitted power)
by sweeping the supply voltage and measuring |
|