| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
45
|
Thu May 27 08:25:37 2010 |
Aidan | Electronics | Hartmann sensor | Hartmann sensor cooling fins added - base piece removed | 8:10AM - I removed the base plate
from the Hartmann sensor. I want to know
what steady-state temperature the HWS achieves |
|
|
46
|
Thu May 27 13:18:51 2010 |
Aidan | Electronics | Hartmann sensor | Removed Cooling fins from Hartmann sensor | I removed the cooling fins from the Hartmann
sensor to see what steady-state temperature
it reached without any passive cooling elements. |
|
|
47
|
Thu May 27 15:42:06 2010 |
Aidan | Electronics | Hartmann sensor | Hartmann sensor with just the base piece | I switched in just the base piece of the
Hartmann sensor. The cooling fins are removed.
I bolted the camera securely to the base |
|
|
48
|
Thu May 27 17:49:02 2010 |
Aidan | Electronics | Hartmann sensor | Hartmann sensor cooling fins added - base piece added | Back to Configuration 1 again - this
time the fins were bolted very securely to
the camera. |
|
|
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: |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
109
|
Wed Feb 23 20:18:30 2011 |
Aidan | Electronics | Hartmann sensor | Successfully re-started the Hartmann sensor | I reattached the Hartmann Sensor
to the LENOVO machine that is running Ubuntu
and turned it on (it's been disconnected |
|
|
119
|
Tue Mar 1 17:05:45 2011 |
Aidan | Electronics | Hartmann sensor | Dalsa 1M60 current draw | Steve and I measured the current drawn
by the Dalsa 1M60 by connecting it to the
BK Precision 1735 lab power supply that display |
|
|
150
|
Thu May 26 11:56:46 2011 |
Aidan | Electronics | Laser | Green Laser Pointer beam profile | This measurement was made with the Thorlabs
DCC1545M-GL camera with an RG850 3mm long-pass
filter over the CCD. |
|
|
155
|
Fri Sep 2 21:41:01 2011 |
Aidan | Electronics | Hartmann sensor | Restarting long term test of QFLD-950-3S | 9:40PM PDT - I've just restarted the long
term measurement of the Hartmann sensor noise
with the QFLD-950-3S. |
|
|
184
|
Wed Apr 26 15:29:25 2017 |
Aidan | Electronics | Hartmann sensor | Long term test of fiber launcher | I've started a long-term measurement
of the HWS fiber-launcher. I'm interested
in seeing how stable the output is. The HWS |
|
|
185
|
Wed May 24 09:58:17 2017 |
Aidan | Electronics | Electronics | Temperature sensor batteries swapped in TCS Lab | I noticed that the TCS lab temperature
sensor batteries died. Apparently they died
two days ago. I swapped in some new batteries |
|
|
187
|
Thu Jul 13 10:11:57 2017 |
awade | Electronics | Borrowed | Borrowed newport TrueRMS Supermeter | I lent your fancy Newport TrueRMS Supermeter
with the thermocouple plugs on the top to
the SURF student Jordon. He has it |
|
|
238
|
Tue Aug 6 19:22:28 2019 |
Jon | Electronics | Computing | QIL NFS server set up | I've started building the NFS server
for the QIL cymac. It's sitting on the
workbench in the TCS lab next to the rack. |
|
|
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 |
|
|
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 |
|
|
113
|
Thu Feb 24 14:23:58 2011 |
Aidan | Lab Infrastructure | Hartmann sensor | Hartmann Sensor box cut down to size | I reduced the height of the Hartmann
sensor box. This is what it looks like now:
|
|
|
126
|
Fri Mar 11 13:11:33 2011 |
Aidan | Lab Infrastructure | Delivery Note | More Bosch connectors have arrived | See attached delivery note ... |
|
|
127
|
Wed Mar 16 15:05:47 2011 |
Aidan | Lab Infrastructure | Delivery Note | More Bosch equipment has arrived | 30mm T-junctions, grounding straps and
T-slot covers have arrived
|
|
|
143
|
Thu Apr 28 22:48:47 2011 |
Aidan | Lab Infrastructure | Electronics | BNC Cables from HWS table to rack | I labelled and strung 8 of the 16
custom 40' BNC cables from L-Com between
the HWS table and the BNC feed-through on |
|
|
190
|
Wed Oct 11 20:19:06 2017 |
Jon Richardson | Lab Infrastructure | Hartmann sensor | Initial Characterization of the SRM Adaptive Wavefront Control | Today I made the first characterization
measurements of the mocked-up adaptive wavefront
control system planned for the signal recycling |
|
|
191
|
Fri Oct 13 15:52:41 2017 |
Aidan | Lab Infrastructure | General | Broadband mirror BB2-E03 reflectivity at 532nm | I measured the reflectivity of a possible
HWS replacement mirror at 532nm. Thorlabs
BB2-EO3 |
|
|
225
|
Fri Feb 8 10:48:33 2019 |
Aidan | Lab Infrastructure | General | Water damage repair work in the TCS Lab | Caltech Facilities has determined that
the walls in the SE corner of the TCS Lab
in West Bridge were water damaged during |
|
|
226
|
Fri Apr 12 17:40:58 2019 |
aaron | Lab Infrastructure | General | Measurements for Bake Station | I drew up one way we could set up the three
available bake ovens in the TCS lab on the
single oil pump. |
|
|
227
|
Mon Apr 15 08:12:58 2019 |
aaron | Lab Infrastructure | General | Measurements for Bake Station | My preference is to have tubes back towards
the wall where possible. We might be able
to drill a large diameter hole in the table |
|
|
228
|
Thu May 23 11:36:49 2019 |
agupta | Lab Infrastructure | Borrowed | Borrowed Label Maker | I have borrowed TCS's label maker in
CTN for few days. If you need it, you can
take it from the top of blue cabinets. |
|
|
229
|
Mon Jun 17 20:29:34 2019 |
Jon | Lab Infrastructure | Computing | Server rack cleaned up, new workstation installed | In anticipation of the point absorber SURF
project, I cleaned up the server rack and
installed a new workstation today. |
|
|
230
|
Tue Jun 18 19:05:16 2019 |
Jon | Lab Infrastructure | General | Large optical table cleared and set up for point absorbers | Aidan and I continued the lab clean-up
today. There's still more to do, but
we did fully clear the large optical table |
|
|
231
|
Mon Jul 22 09:44:21 2019 |
Jon | Lab Infrastructure | Computing | Installed Amplifying VGA Splitter | The VGA signal outputted by the multiplexer
is too weak to drive two monitors. This has
required video cables to be manually switched |
|
|
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 |
|
|
242
|
Tue Sep 3 10:49:57 2019 |
Aidan | Lab Infrastructure | General | Exhaust duct added for new bake area in TCS lab | Facilities came in on Friday and teed off
a new duct to provide exhaust for the proposed
new vacuum bake area in the TCS Lab. Photos |
|
|
244
|
Tue Jun 15 08:47:27 2021 |
Aidan | Lab Infrastructure | General | Cleaned up HWS table in preparation for lab move | I cleaned up the HWS table in preparation
for replacement with the 4x10 table. We still
need to move the cabinet and get the enclosure |
|
|
247
|
Thu Aug 12 16:13:44 2021 |
Aidan | Lab Infrastructure | Flood | Carpentry shop removed wet plaster sections from the wall - it's drying for a few days | The carpentry shop removed wet plaster
sections from the wall following the flood
(process was gentle scraping of wet plaster |
|
|
250
|
Wed Apr 27 11:41:53 2022 |
Aidan | Lab Infrastructure | General | Lab clean-up to get ready for PD testing in old TCS Lab | We (Aidan, Koji, Radhika, Aaron) partially
tidied up the TCS Lab. The front table is
clean and ready to recieve PD tesitng optics, |
|
|
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 |
|
|
1
|
Fri Nov 6 20:09:47 2009 |
Aidan | Laser | Laser | Test | Does this work? |
|
|
2
|
Thu Dec 10 22:23:47 2009 |
Not Aidan | Laser | Laser | Test | Yes.
|
|
|
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 |
|
|
42
|
Mon May 24 19:17:32 2010 |
Aidan | Laser | Hartmann sensor | Replaced Brass Plate with Invar Hartmann Plate | I just replaced the brass Hartmann plate
with the Invar one. The camera was off during
the process but has been turned on again. |
|