| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
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 ...
|
|
|
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 |
|
|
254
|
Fri Jul 8 07:06:41 2022 |
Jc | Misc | VAC | Dewar | [Stephen, JC]
Stephen and I added a new valve
to Dewar's vacuum system. This valve |
|
|
40
|
Thu May 20 10:44:13 2010 |
Aidan | Electronics | SLED | QPhotonics 980nm source power | dV = 0.385V
Responsivity= 0.65A/W
Transimpedance = 1.5E4 V/A |
|
|
41
|
Thu May 20 17:08:36 2010 |
Aidan | Electronics | SLED | SLED module - and driver - LIGO D1000892 - and Hartmann sensor | Verified that the test-point for the current
limit pot on the driver (Wavelength Electronics
- LDTC 0520) was at 0.5V. Driver is set to |
|
|
43
|
Wed May 26 06:47:02 2010 |
Aidan | Laser | SLED | Switched off SLED - 6:40AM | |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
8
|
Thu Feb 4 15:26:37 2010 |
Aidan | Electronics | Ring Heater | Ring heater transfer function measurement 240mHz-5Hz |
|
|
|
9
|
Thu Feb 4 19:45:56 2010 |
Aidan | Misc | Ring Heater | Ring heater transfer function - increasing collection area | I mounted the thinner Aluminium Watlow
heater inside a 14" long, 1" inner
diameter cylinder. The inner surface was |
|
|
13
|
Thu Feb 11 18:04:08 2010 |
Aidan | Laser | Ring Heater | Ring heater time constant | I've been looking to see what the time
constant of the ring heater is. The attached
plot shows the voltage measured by the photodiode |
|
|
14
|
Thu Feb 11 21:46:23 2010 |
Aidan | Electronics | Ring Heater | Ring heater time constant measurement - start time | After leaving the ring heater off for several
hours I turned on a 40V, 0.2A supply at a
gps time of 949 988 700 |
|
|
15
|
Fri Feb 12 11:39:28 2010 |
Aidan | Electronics | Ring Heater | Ring heater transfer function | I applied a step function to the silver
WATLOW heater and measured the response with
the photodiode. The power spectrum of the |
|
|
16
|
Fri Feb 12 21:00:06 2010 |
Aidan | Electronics | Ring Heater | Ring heater step function response - time series | Hideously slow internet at airport is making
me write a brief entry. This is the times
series of the hesilver watlow heater radiative |
|
|
112
|
Thu Feb 24 14:20:55 2011 |
Aidan | Misc | Ring Heater | aLIGO H2 Ring Heater Pics | Here are some pictures of the ring
heater segments destined for the H2 Y-arm
this year. |
|
|
239
|
Fri Aug 9 20:33:11 2019 |
Jon | Electronics | Ring Heater | Power-regulated heater ready to use | Despite some considerable time spent,
I was not able to get the Omega SCR controllers
working. The first unit definitely arrived |
|
|
10
|
Fri Feb 5 12:42:19 2010 |
Steve | Electronics | Pre-amplifier | Changes to board | Test entry |
|
|
11
|
Mon Feb 8 10:45:50 2010 |
Steve O'Connor | Electronics | Pre-amplifier | replace Pot with fixed Resistor |
|
|
|
12
|
Mon Feb 8 17:44:38 2010 |
Aidan | Electronics | Pre-amplifier | replace Pot with fixed Resistor |
|
|
|
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 |
|
|
153
|
Thu Sep 1 15:51:38 2011 |
Aidan | Laser | Ordering | Access Lasy50 50W laser arrived. | The 50W Access Laser is now in the
lab. We need to wire up the interlock to
the laser, plumb the chiller lines to the |
|
|
252
|
Fri May 20 16:42:47 2022 |
Stephen | Things to Buy | Ordering | Up to Air valve for IR Labs Cryostat | Purchased from Lesker, for venting of IR
Labs Cryostat:
- P/N C35103000 |
|
|
223
|
Fri Oct 26 09:49:47 2018 |
Aidan | Misc | Optics | Starting 80C cure of epoxy | I've started an 80C cure of two materials
bonded by EPOTEK 353ND. The objective is
to see (after curing) how much the apparent glass |
|
|
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 |
|
|
141
|
Sun Apr 24 18:31:18 2011 |
Aidan | Computing | Network architecture | Added hosts and network drives on TCS machines | Under
edit ...
I added the names of the network |
|
|
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 |
|
|
182
|
Thu Dec 15 14:02:01 2016 |
Aidan | Computing | Network architecture | Correct network settings for Ubuntu 14 in /etc/network/interfaces | These settings work to get a computer onto
the TCS/ATF network. |
|