| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
699
|
Wed May 22 07:41:23 2019 |
Alena | General | Measurements | S1600542 S1600664 S1600680 S1600678 | 2019-05-22
08:00 am
in chamber
S1600542 in CR1
S1600664
in CR2
S1600678 in CR3
S1600680 |
|
|
700
|
Thu May 23 09:59:09 2019 |
Alena | General | Measurements | S1600649 S1600650 S1600651 S1600652 | 2019-05-23
09:50 am
in chamber
S1600649 in CR1
S1600650
in CR2
S1600651 in CR3
S1600652 |
|
|
701
|
Thu May 23 18:16:11 2019 |
Alena | General | Measurements | S1600709 S1600710 S1600711 S1600712 | 2019-05-23
18:00 in
chamber
S1600709 in CR1
S1600710
in CR2
S1600711in CR3
S1600712 |
|
|
703
|
Tue May 28 15:48:42 2019 |
Alena | General | Vacuum | Low pressure gauge exchange | After venting the vacum chamber (CR14)
a few times, checking for leaks and trying
to tune settings to the gauges controller, |
|
|
704
|
Wed May 29 08:36:07 2019 |
Alena | General | Measurements | S1600713 S1600714 S1600715 S1600716 | 2019-05-24
15:00 in
chamber
S1600713 in CR1
S1600714
in CR2
S1600715in CR3
S1600716 |
|
|
705
|
Thu May 30 13:53:03 2019 |
Alena | General | Measurements | S1600717 S1600718 S1600719 S1600720 | 2019-05-30
14:30 in
chamber
S1600717 in CR1
S1600718
in CR2
S1600719in CR3
S1600720 |
|
|
706
|
Tue Jun 4 15:07:55 2019 |
Alena | General | Measurements | S1600542 S1600664 S1600678 S1600680 | 2019-06-04
15:10 in
chamber
S1600542 in CR1
S1600664
in CR2
S1600678 in CR3
S1600680 |
|
|
707
|
Fri Jun 7 07:32:51 2019 |
Alena | General | Measurements | S1600542 S1600664 S1600678 S1600680 | 2019-06-06
15:40 in
chamber
S1600542 in CR1
S1600664
in CR2
S1600678 in CR3
S1600680 |
|
|
854
|
Tue Mar 31 13:12:21 2020 |
Alena | General | Measurements | S1600784 S1600785 S1600789 S1600791 | 2020-03-31
1:00 pm
in chamber
S1600784in CR1
S1600785
in CR2
S1600789 in CR3
S1600791 |
|
|
256
|
Fri Jan 6 12:19:22 2017 |
Alena, Bob, Stephen and Calum | General | Daily Progress | Second vacuum chamber | Cleaning and baking (200 C air foe SS and
120 for Al) parts for the new vacuum chamber
|
|
|
155
|
Tue Nov 1 15:34:49 2016 |
Alena, Calum | General | | Annealing run | Annealing run (449-453) on 3" wafers
- Crime 11/01/2016 https://dcc.ligo.org/T1600507 |
|
|
174
|
Thu Nov 10 16:07:13 2016 |
Alena, Calum | General | General | Annealing run | Annealing run (466-471) on 3" wafers
- Crime 11/10/2016
https://dcc.ligo.org/LIGO-T1600524 |
|
|
184
|
Mon Nov 14 08:54:49 2016 |
Alena, Calum | General | General | Annealing run | Annealing run (472-477) on 3" wafers
- Crime 11/11/2016 https://dcc.ligo.org/T1600527 |
|
|
90
|
Fri Aug 19 13:46:55 2016 |
Alena, Calum, Jon, Liz, Steve, Gabriele | Facility | Daily Progress | Clean room and vacuum complete | This morning we installed the clean room
curtains and washed them. It turns out that
the air filters are supposed to be powered |
|
|
67
|
Thu Jul 28 13:58:48 2016 |
Alena, Gabriele | Clean | Daily Progress | The old chamber is now being cleaned and baked | Cleaned the chamber in the washing machine
at 40m and started 48 baking at 120 C |
|
|
86
|
Tue Aug 16 11:53:30 2016 |
Alena, Gabriele | Clean | Daily Progress | Clean room progress | Some progress on the cleam room: bar fixed
to the wall, some more structure built, filters
in place. We had to (literally) work around |
|
|
337
|
Fri Apr 7 14:12:52 2017 |
Eric, Gabriele | General | General | S1600525 S1600526 S1600527 S1600528 | 2017-04-07
2:12pm in
chamber, pumps on
S1600525
in CR1
S1600526 in CR2
S1600527 |
|
|
9
|
Mon May 2 11:46:45 2016 |
Gabriele | Facility | Daily Progress | Table and vacuum chambers in the lab | Elogs for the new Coatin
RIng-down
MEasurement |
|
|
10
|
Tue May 3 11:57:47 2016 |
Gabriele | Facility | Daily Progress | Table and vacuum chambers in the lab | We discovered a couple of days ago that
the table was sitting on three legs only
and the fourth one was dangling. I managed |
|
|
11
|
Fri May 6 14:20:43 2016 |
Gabriele | Electronics | Design | Design of optical lever electronics | For the optical levers we are going to
use the same QPD that are used in aLIGO optical
levers (see T1600085 and |
|
|
13
|
Tue May 10 13:32:17 2016 |
Gabriele | Electronics | Design | Design of optical lever electronics | After a very useful discussion with Rich
this morning, I think the circuit based on
aLIGO optical levers design should be good |
|
|
14
|
Thu May 19 11:33:44 2016 |
Gabriele | Electronics | Design | Optical lever electronics design | The circuit design sent out for fabrication
is available in the DCC: D1600196 |
|
|
15
|
Thu May 19 11:36:04 2016 |
Gabriele | Mechanics | Design | A first design of the disk assembly | Here are some screenshots of the disk assembly
and a look at how four of them will sit into
the vacuum chamber. The Solidworks models |
|
|
16
|
Fri May 20 15:18:58 2016 |
Gabriele | Optics | Design | Optical levers layout | Attached a first layout of the optical
lever systems. The beam spot radius on the
QPD is about 0.8 mm, and the lever arm length |
|
|
17
|
Sun May 22 23:40:45 2016 |
Gabriele | Optics | Design | Optical levers layout | An improved design is attached. I modified
the input telescope to avoid using shor focal
length lenses, to make it less critical, |
|
|
18
|
Thu May 26 02:51:27 2016 |
Gabriele | Electronics | Design | ESD design | A preliminary design of the ESD board is
available on the DCC: D1600214 |
|
|
19
|
Fri May 27 02:09:37 2016 |
Gabriele | Mechanics | Characterization | Lowest usable mode of fused silica disks | I did some FEA simulation of fused silica
disks, to identify the lowest usable eigenmode.
By usable I mean a mode that has zero elastic |
|
|
20
|
Mon Jun 6 13:35:36 2016 |
Gabriele | Electronics | General | Components | The PCBs for the QPD circuit and ADC interface
are here and look ok. All electronics components
are also here (except for the ADC connector |
|
|
21
|
Tue Jun 7 14:07:55 2016 |
Gabriele | Facility | General | Rack and workstation | I moved the unused rack from the Crackling
Noise lab to the C.Ri.Me lab. It will be
used for the new cymac. I also started putting |
|
|
22
|
Fri Jun 10 13:44:06 2016 |
Gabriele | Electronics | Configuration | How to setup a workstation | Instructions on how to setup a workstation
are available here:
https://nodus.ligo.caltech.edu:8081/Cryo_Lab/1135 |
|
|
23
|
Thu Jun 16 00:47:42 2016 |
Gabriele | Optics | Daily Progress | Quality factor measurement of a Mark Optics disk at LMA | [Massimo Granata (LMA), Quentin Cassar
(LMA), Gabriele]
This week I'm visiting LMA |
|
|
24
|
Fri Jun 24 17:03:47 2016 |
Gabriele | Electronics | Daily Progress | QPD electronics | Between yesterday and today I populated
one QPD board (based on D1600196),
and started testing it. The transimpedance |
|
|
25
|
Tue Jun 28 10:17:28 2016 |
Gabriele | Electronics | Daily Progress | QPD electronics | Transimpendance and whitening are working
properly. I can't get useful signal out
of the differential stages yet. I replaced |
|
|
26
|
Wed Jun 29 16:44:17 2016 |
Gabriele | General | Configuration | First disk eigenfrequency | The following table shows the lowest eigenfrequency
(Hz) for different sizes of disks
|
|
|
27
|
Thu Jun 30 16:18:28 2016 |
Gabriele | Electronics | Daily Progress | QPD electronics is working | Today I gave up trying to fix the first
board I populated, and built a second one.
The good news is that it's working as |
|
|
28
|
Thu Jun 30 17:23:54 2016 |
Gabriele | Electronics | Daily Progress | Cymac | I got two new ADC and DAC boards from Rolf,
with the correct PCIe interface. I installed
them into the cymac and checked that the |
|
|
29
|
Fri Jul 1 15:12:12 2016 |
Gabriele | Electronics | Daily Progress | QPD electronics noise |
I turned out that all the noise
I was seeing in the QPD spectrum was due |
|
|
31
|
Thu Jul 7 17:44:11 2016 |
Gabriele | Facility | Daily Progress | Vacuum chamber tests | [Alena, Gabriele]
This afternoon we opened the tall
belljar vacuum chamber, and took everything |
|
|
34
|
Fri Jul 8 16:49:11 2016 |
Gabriele | Electronics | Configuration | CyMAC | In the last days Jamie installed the patched
kernel to run the real time system (RTS)
on the new CyMAC. Today (with Jamie's |
|
|
35
|
Mon Jul 11 08:49:25 2016 |
Gabriele | Electronics | Configuration | Cymac RTS configuration | I copy here parts of an email from Jamie
with instructions on how to run the RTS on
the cymac: |
|
|
37
|
Mon Jul 11 15:21:12 2016 |
Gabriele | General | Daily Progress | One disk installed into the chamber | [Alena, Gabriele]
We attached one of the silicon
lenses to a 1" optical post using some |
|
|
39
|
Tue Jul 12 17:19:07 2016 |
Gabriele | Electronics | Daily Progress | ADC and DAC cabling | This afternoon I completed the assembly
of the electronics boards to interface the
ADC and DAC. The ADC is interfaced with a |
|
|
42
|
Thu Jul 14 17:06:47 2016 |
Gabriele | Electronics | Configuration | Networking | The laboratory workstation is coatings.ligo.caltech.edu
The RTS is cymac3.ligo.caltech.edu
I set up a ssh-mount of the /opt/rtcds/userapps |
|
|
43
|
Fri Jul 15 16:05:07 2016 |
Gabriele | Electronics | Daily Progress | Electrostatic actuator installed | Using the already installed high voltage
feedthrough, I cabled one of the electrostatic
actuators (1mm gap between electrodes) and |
|
|
44
|
Fri Jul 15 17:56:50 2016 |
Gabriele | General | Daily Progress | QPD connected to digital system | I connected the QPD to the ADC interface
with a temporary cable running on the floor.
I could get signals. I still have |
|
|
45
|
Sat Jul 16 14:15:44 2016 |
Gabriele | Facility | Daily Progress | Pump down started | Following Alena's
procedure, at about 1:30pm LT I started
the chamber pump down. At 14:15pm LT the |
|
|
46
|
Mon Jul 18 13:39:45 2016 |
Gabriele | Facility | Daily Progress | Pump down started | Today at 1:40pm pressure is 8.5e-7 Torr
|
|
|
47
|
Mon Jul 18 13:42:46 2016 |
Gabriele | Electronics | Characterization | QPD signal convention | The QPD quadrants are wired accoridng to
the following convention
|
|
|
48
|
Mon Jul 18 14:29:07 2016 |
Gabriele | General | Daily Progress | Status of the test setup | I checked that the QPD electronics works
as expected, and that I can acquire the signals
using the ADCs. A new model (x3cr1) is up |
|
|
49
|
Mon Jul 18 17:46:04 2016 |
Gabriele | General | Daily Progress | First look at QPD signals | Here's the first spectrum of the QPD
X and Y signals, acquired with the digital
system. Roughing and turbo pumps are still |
|