| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
124
|
Mon May 13 14:49:35 2013 |
Koji | Mechanics | Characterization | Mounting Glass Bracket still broke with tightenin stress | [Koji / Jeff]
This is the elog about the work on
May 9th. |
|
|
116
|
Thu Apr 18 11:43:59 2013 |
Koji | General | General | Mounting Glass Bracket Failure | [Jeff, Koji]
- While we were working on the optics
alignment, one of the mounting brackets made |
|
|
35
|
Thu Nov 8 13:24:53 2012 |
Koji | Optics | Characterization | More wedge measurement | A1
Horiz Wedge 0.497
+/- 0.004 deg |
|
|
243
|
Thu Sep 10 04:03:42 2015 |
Koji | Optics | Characterization | More polarizer optics measurement (Summary) | Brewster calcite PBS (eLIGO
Squeezer OFI)
Loss L = 3600 +/- 200ppm |
|
|
244
|
Wed Sep 23 17:49:50 2015 |
Koji | Optics | Characterization | More polarizer optics measurement (Summary) | For the Glasgow PBS, the measurement has
been repeated with different size of beams.
In each case, the PBS crystal was |
|
|
65
|
Fri Mar 1 23:06:15 2013 |
Koji | Optics | Configuration | More perpendicularity test final | Perpendicularity of the "E" mirror
was measured.
Mounting Prisms: |
|
|
64
|
Wed Feb 27 18:18:48 2013 |
Koji | Optics | Configuration | More perpendicularity test | Mounting Prisms:
(criteria: 30arcsec = 145urad =>
0.36mm spot shift) |
|
|
260
|
Tue Apr 5 21:20:15 2016 |
Koji | Electronics | Characterization | More dark noise measurement | All survived PDs have been measured. |
|
|
182
|
Thu Apr 17 21:39:25 2014 |
Koji | Optics | General | More alignment | STORY:
- The cavity mirrors have scattering
spots. The cavity alignment should have been |
|
|
42
|
Mon Nov 26 01:40:00 2012 |
Koji | Optics | Characterization | More RoC measurement | C1: RoC: 2.57845 +/− 4.2e−05m
|
|
|
100
|
Mon Apr 8 11:11:37 2013 |
Koji | Optics | Characterization | More Mirror T measurement | More Ts of the mirrors were measured.
A mirror specification:
Request: 8300+/-800 ppm |
|
|
308
|
Sun Sep 23 19:42:21 2018 |
Koji | Optics | General | Montecarlo simulation of the phase difference between P and S pols for a modeled HR mirror | [Koji Gautam]
With Gautam's help,
I ran a coating design code for an HR mirror |
|
|
309
|
Thu Sep 27 20:19:15 2018 |
Aaron | Optics | General | Montecarlo simulation of the phase difference between P and S pols for a modeled HR mirror | I started some analytic calculations of
how OMC mirror motion would add to the noise
in the BHD. I want to make some prettier |
|
|
310
|
Thu Nov 1 19:57:32 2018 |
Aaron | Optics | General | Montecarlo simulation of the phase difference between P and S pols for a modeled HR mirror | I'm still not satisfied/done with the
solution to this, but this has gone too long
without an update and anyway probably someone |
|
|
305
|
Wed Aug 8 17:32:56 2018 |
Rich Abbott | General | Characterization | Modulation Index Test Setup at 40m Lab | Attached is a block diagram of the test
setup used in the 40m lab to measure the
modulation index of the IO modulator |
|
|
306
|
Thu Aug 9 11:24:29 2018 |
Koji | General | Characterization | Modulation Index Test Setup at 40m Lab | [Rich Koji]
The impedances of the new LLO EOM
were measured with the beat note setup at |
|
|
8
|
Wed Jul 18 23:20:13 2012 |
Koji | Optics | Characterization | Mode scan results of ELIGO | Nic Smith sent me a bunch of elog lists
where the results of the mode scan can be
found. |
|
|
95
|
Thu Apr 4 01:35:04 2013 |
Koji | Optics | Characterization | Mode matching to the OMC cavity | The fiber output was matched with the lenses
on a small bread board.
The detailed configuration is found |
|
|
559
|
Wed Jul 12 17:27:44 2023 |
Koji | General | General | Mitsutoyo Digital Caliper (100mm) | We had missing digital caliper from the
clean room. As it is an essential component,
I have ordered a replacement. |
|
|
216
|
Tue Aug 5 13:03:25 2014 |
Koji | General | General | Missing cable components | DCPD Connector Face: Qty2 https://dcc.ligo.org/LIGO-D1201276
QPD Connector Face: Qty2 https://dcc.ligo.org/LIGO-D1201282
PD faster: 92210A07 Qty 4: MCMASTER |
|
|
179
|
Fri Feb 28 19:50:11 2014 |
Koji | General | General | Misalignment ABCD matrix for the aLIGO OMC | Relationship between mirror misalignment
and cavity mode shift was calculated.
The technique described in T0900647 |
|
|
101
|
Mon Apr 8 11:29:08 2013 |
Koji | Optics | Characterization | Mirror/PZT Characterization links |
Mirror
List
http://nodus.ligo.caltech.edu:8080/OMC_Lab/152 |
|
|
151
|
Fri Aug 16 15:31:17 2013 |
Koji | Optics | Configuration | Mirror list for OMC(002) | OMC(002)
Cavity Mirrors
FM1 (input coupler): A9 |
|
|
113
|
Tue Apr 16 09:43:58 2013 |
Koji | Optics | Configuration | Mirror list for L1OMC | L1 OMC
Cavity Mirrors
FM1 (input coupler): A8 |
|
|
91
|
Mon Apr 1 18:17:01 2013 |
Koji | Optics | General | Mirror curvature center test | Locations of the curvature minimum
on the OMC curved mirrors have been measured.
|
6x |
|
40
|
Sat Nov 17 02:31:34 2012 |
Koji | Optics | Characterization | Mirror T test | Mirror T test
The mirror was misaligned to have
~2deg incident (mistakenly...) angle. |
|
|
96
|
Thu Apr 4 01:43:06 2013 |
Koji | Optics | Characterization | Mirror T measurement | [Zach, Koji]
The measurement setup for the transmission
measurement has been made at the output of |
|
|
183
|
Mon May 12 22:43:02 2014 |
Koji | Optics | Characterization | Measured FSR/TSM of the OMC cavity | Data analysis of the FSR/TSM measruement
last week.
1. FSR was measured with "the |
|
|
94
|
Thu Apr 4 00:35:42 2013 |
Zach | Optics | Configuration | MMT installed on breadboard, periscope built | [Koji, Zach]
|
|
|
355
|
Thu Apr 25 15:05:19 2019 |
Joe | Optics | Characterization | Looking at PZT HOM spacing dependance and thinking about workflow | [koji, joe]
The template or glass breadboard
was wobbling, and we noticed that the caivty |
|
|
26
|
Fri Oct 12 17:15:19 2012 |
Koji | Optics | General | Loan from the 40m / ATF |
HWP set
|
|
|
248
|
Fri Dec 18 15:33:24 2015 |
Koji | General | Loan / Lending | Loan from Rich | Loan Record: I borrowed a PD can opener
from Rich => Antonio Returned Sep
9, 2016 |
|
|
82
|
Tue Mar 26 22:33:07 2013 |
Koji | General | General | Loan for the OMC building | Loan from PSL Lab
- 300mm mirror with Ultima mount
and pedestal |
|
|
122
|
Wed May 8 15:36:50 2013 |
Koji | General | General | Latest OMC schedule |
May
(done) Mon 6th:
Invar plate arrival / Spot position measurement
(done)
Tue 7th: Invar plate cleaning / Spot position |
|
|
15
|
Sat Aug 11 00:59:14 2012 |
Koji | Facility | General | Laser Safety Barrier | It seemed that a laser safety barrier was
installed today!?
|
|
|
46
|
Wed Dec 26 14:33:33 2012 |
Koji | Facility | General | Lase Interlock wired | Two switches are connected in series. |
|
|
392
|
Mon Aug 10 15:53:46 2020 |
Koji | General | General | Lab status check | Check-in to the OMC lab to see the status.
Nothing seemed changed. No bug. The HEPA
is running normal. The particle level was |
|
|
270
|
Mon Nov 21 21:19:20 2016 |
Koji | Optics | General | LWE NPRO Laser / Input Optics / Fiber Coupling | - About 1.5 month ago, an 700mW LWE NPRO
has been brought to OMC Lab.
- The SOP can be found here. |
|
|
271
|
Wed Dec 7 19:18:10 2016 |
Koji | Optics | General | LWE NPRO Laser / Input Optics / Fiber Coupling | FIber Input Mount 132deg
Fiber output mount 275deg
-> 525mW P: 517mW S: 8mW extinction |
|
|
450
|
Mon Sep 26 14:27:49 2022 |
Koji | General | General | LLO OMC ICS work | OMC
#001
ICS Link: https://ics.ligo-la.caltech.edu/JIRA/browse/ASSY-D1201439-1
Already |
|
|
446
|
Thu Aug 25 14:22:08 2022 |
Koji | General | General | LLO OMC #001 Ballast Mass investigation | Inspected the past LLO add-on mass configuration.
There are unknown masses at the
DCPD side. It looks like a small SS mass |
|
|
447
|
Thu Aug 25 20:05:00 2022 |
Koji | General | General | LLO OMC #001 Ballast Mass investigation | Here is the balance mass info for the LLO
OMC#001 analyzed from the photographs
Added masses are: 50+10g, |
|
|
178
|
Tue Feb 18 18:58:38 2014 |
Koji | General | General | LHO H1 OMC installation photos | LHO OMC installation photos
|
|
|
620
|
Tue Aug 29 16:54:46 2023 |
Koji | Facility | General | LED Strip installed | [JC, Koji]
We've installed the LED strips
on the HEPA frame. We tried not to touch |
|
|
619
|
Fri Aug 25 22:01:29 2023 |
Koji | Facility | General | LED Strip installation plan | Here are the dimensions of the LED strips
and their gaps. |
|
|
139
|
Wed Jun 5 18:51:31 2013 |
Koji | General | General | L1 OMC shipped out | [Koji, Jeff]
The L1 OMC |
|
|
137
|
Wed Jun 5 01:06:35 2013 |
Zach | General | Characterization | L1 OMC as-built diagram | D1300507
|
|
|
261
|
Fri Jun 10 17:12:57 2016 |
Koji | General | Configuration | L1 OMC DCPD replacement | New DCPD(T) = A1-23
DCPD(T) = DCPDB: extracted and accomodated
in CAGE-G SLOT1 |
|
|
376
|
Wed Sep 18 23:16:06 2019 |
Stephen | Supply | General | Items staged at 40m Bake Lab for PZT Subassembly Bonding | The following items are presently staged
at the 40m Bake Lab (see photo indicating
current location) (noting items broght by |
|
|
214
|
Thu Jul 31 15:07:53 2014 |
Koji | General | General | Item lending | Tara: Laser Safety goggle ->
Returned
Evan: |
|