| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
580
|
Wed Jul 26 15:01:26 2023 |
Madeline Lesovsky | Optics | General | Subassembly Bonding Effort - Oven Bake Profile Results | The bonding efforts were conducted on Thursday,
July 13, 2023 (https://nodus.ligo.caltech.edu:8081/OMC_Lab/561)
The duration of the air bake in |
|
|
218
|
Tue Sep 9 20:59:19 2014 |
Koji | Mechanics | Characterization | Structural mode analysis for the PZT mirror | Structural analysis of the PZT mirror with
COMSOL.
Inline figures: Eigenmodes |
6x |
|
168
|
Fri Sep 13 15:09:20 2013 |
Koji | General | General | Sprinkler installation: done | A sprinkler head was installed on the HEPA
enclosure. The head is covered with a plastic
cap. |
|
|
180
|
Mon Mar 3 02:46:21 2014 |
Koji | General | Characterization | Spot positions scanned | Spot positions on CM1 and CM2 scanned according
to the recipes provided by the previous entry.
The best result obtained was: |
|
|
120
|
Mon May 6 19:31:51 2013 |
Koji | Optics | Characterization | Spot position measurement on the diode mounts | Measurement Order: DCPD2->DCPD1->QPD1->QPD2
DCPD1: 1.50mm+0.085mm => Beam
0.027mm too low |
|
|
121
|
Wed May 8 15:08:57 2013 |
Koji | Optics | Characterization | Spot position measurement on the diode mounts | Remeasured the spot positions:
DCPD1: 1.50mm+0.085mm => Beam
0.084mm too high |
|
|
158
|
Tue Aug 27 17:02:31 2013 |
Koji | Mechanics | Characterization | Spot position measurement on the diode mounts | After the PZT test, the curved mirrors
were aligned to the cavity again.
In order to check the height of the |
|
|
213
|
Mon Jul 21 01:02:43 2014 |
Koji | Mechanics | Characterization | Some structual mode analysis | Prisms
Fundamental: 12.3kHz Secondary: 16.9kHz
|
6x |
|
138
|
Wed Jun 5 18:19:51 2013 |
Koji | General | General | Some recent photos from the OMC final test at CIT | Applying First Contact for the optics cleaning
|
|
|
284
|
Sat Jul 1 21:33:18 2017 |
Koji | General | General | Some purchase notes | - Forgot to close the cylinder valve...
v HEPA prefilter (20"x20"x1"
MERV 7) |
|
|
52
|
Sun Jan 6 23:22:21 2013 |
Koji | Mechanics | General | SolidWorks model of the OMC suspension | |
|
|
48
|
Mon Dec 31 03:10:09 2012 |
Koji | Optics | General | SolidWorks model of the OMC breadboard | |
|
|
36
|
Thu Nov 8 19:47:55 2012 |
Koji | Electronics | Configuration | Solder for PZTs | Rich saids:
I |
|
|
351
|
Mon Apr 22 09:54:21 2019 |
Joe | General | | Shortening cavity (A5,A14,PZT11,PZT22) to get closer to design FSR | [Koji,Joe,Philip,stephen]
in units 20um per div on the micrometer
[n.b. we reailised that its 10um per div |
|
|
451
|
Mon Nov 7 21:16:16 2022 |
Camille | Optics | Configuration | Setting up the fiber couplers | [Camille, Koji]
Began setting up fiber assembly
for OMC testing: |
|
|
452
|
Mon Nov 7 22:00:33 2022 |
Koji | Optics | Configuration | Setting up the fiber couplers | Fiber matching: 43.2/56.7 = 76%
S/P-pol ratio 0.7/43.2 = 1.6%
|
|
|
584
|
Wed Aug 2 07:32:28 2023 |
Camille Makarem, Thejas | Optics | General | Setting up electronics and locking the cavity | [Camille, Thejas, Masayuki, Koji]
Previously, we were using the function
generator to drive the laser without using |
|
|
370
|
Mon Jul 1 12:49:42 2019 |
Koji | Optics | Characterization | Scattering measurement of A and C mirrors | Liyuan's scattering measurement for
the A and C mirrors. |
|
|
516
|
Tue Mar 28 11:21:27 2023 |
Camille Makarem | Optics | Characterization | Sagitta measurements of curved mirrors | [Camille, Stephen, Thejas]
Curved mirror sn02 was used to test |
|
|
423
|
Fri Jul 22 17:41:01 2022 |
Koji | General | General | SRS LCR meter SRS720 returned to Downs | SRS LCR meter SRS720 was returned to Downs
as before.
|
|
|
408
|
Thu May 20 17:03:50 2021 |
Koji | General | General | SRS LCR meter SRS720 borrowed from Downs | Item loan: SRS LCR meter SRS720 borrowed
from Downs. The unit is at the 40m right
now for testing with an excelitas PD. Once |
|
|
58
|
Tue Jan 22 17:56:32 2013 |
Koji | Mechanics | General | Rotary stage selection | Newport UTR80
Sensitivity: 4 arcsec
|
|
|
16
|
Mon Aug 13 16:59:11 2012 |
Koji | Clean | General | Room Cleaning Log | Floor wiped with a wet wiper (Aug 13, 2012)
Floor wiped with a wet wiper (Aug
15, 2012) |
|
|
30
|
Wed Oct 17 20:36:04 2012 |
Koji | Optics | General | RoC test cavity locked | The RoC test setup has been built on
the optical table at ATF.
|
|
|
6
|
Fri Jun 29 11:26:04 2012 |
Zach | Optics | Characterization | RoC measurement setup | Here is the proposed RoC measurement
setup. Koji tells me that this is referred
to as "Anderson's method". |
|
|
9
|
Sun Jul 22 15:56:53 2012 |
Zach | Optics | Characterization | RoC measurement setup | Here is a more detailed version of
the setup, so that we can gather the parts
we will need. |
|
|
22
|
Fri Oct 5 03:39:58 2012 |
Koji | Optics | General | RoC Test setup | Based on Zach's experiment design, I wrote
up a bit more detailed optical layout for
the mirror test. |
|
|
41
|
Mon Nov 19 13:33:14 2012 |
Koji | Optics | Characterization | Resuming testing mirror RoCs | In order to resume testing the curvatures
of the mirrors, the same mirror as the previous
one was tested. |
|
|
622
|
Thu Sep 14 14:26:51 2023 |
Camille Makarem | Electronics | Characterization | Remaining PZT tests | PZTs 31, 32, 35, 40 and 45 have had their
DC responses measured (pre-reliability test)
and have been through the reliability test |
|
|
485
|
Sat Feb 4 03:22:46 2023 |
Koji | Facility | General | Ready for the HEPA enclosure expansion | HEPA is quite low for a tall person and
also the curtain on the back of us is always
heavy. It's very tough for anyone to |
|
|
514
|
Fri Mar 24 07:38:54 2023 |
Camille Makarem | Optics | Characterization | ROC measurements of the curved mirrors | [Thejas, Camille]
21 March 2023
We made slight adjustments to the |
|
|
515
|
Fri Mar 24 07:47:37 2023 |
Camille Makarem | Optics | Characterization | ROC measurements of the curved mirrors | [Camille]
22 March 2023
Beam profile measurements were continued |
|
|
228
|
Wed Jul 22 10:15:14 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF test of the EOM/AOM Driver S1500117 | 7) Make sure the on/off RF button works,
=> OK
8) Make sure the power output doesn't |
|
|
229
|
Sat Jul 25 17:24:11 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF test of the EOM/AOM Driver S1500117 | (Calibration for Attachment 5 corrected
Aug 27, 2015)
Now the test procedure |
7x |
|
230
|
Tue Jul 28 18:36:50 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF test of the EOM/AOM Driver S1500117 | Final Test Result of S1500117:
https://dcc.ligo.org/LIGO-S1500117
After some staring the |
|
|
307
|
Wed Aug 29 11:06:30 2018 |
Koji | General | General | RF AM RIN and dBc conversion | 0. If you have an RF signal whose waveform
is , the amplitude is constant and 1. |
|
|
237
|
Fri Aug 28 01:08:14 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF AM Measurement Unit E1500151 ~ Calibration | Worked on the calibration of the
RF AM Measurement Unit.
The calibration concept is as follows: |
|
|
238
|
Fri Aug 28 02:14:53 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF AM Measurement Unit E1500151 ~ 37MHz OCXO AM measurement | In order to check the noise level
of the RFAM detector, the power and cross
spectra for the same signal source |
|
|
240
|
Tue Sep 8 10:55:31 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF AM Measurement Unit E1500151 ~ 37MHz OCXO AM measurement | Test sheet: https://dcc.ligo.org/LIGO-E1400445
Test Result (S1500114): https://dcc.ligo.org/S1500114 |
|
|
231
|
Mon Aug 10 02:11:47 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF AM Measurement Unit E1500151 | This is an entry for the work on Aug 3rd.
LIGO
DCC E1500151 |
|
|
232
|
Mon Aug 10 11:39:40 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF AM Measurement Unit E1500151 | Entry for Aug 6th, 2015
I faced with difficulties to operate
the RF AM detectors. |
|
|
233
|
Mon Aug 10 11:57:17 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF AM Measurement Unit E1500151 | Spending some days to figure out how to
program CPLD (Xilinx CoolRunner II XC2C384).
I learned that the JTAG cable which |
|
|
234
|
Mon Aug 10 12:09:49 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF AM Measurement Unit E1500151 | Still suffering from a power supply
issue!
I have been tracking the issues |
|
|
597
|
Tue Aug 8 07:30:49 2023 |
Camille Makarem | Optics | General | REFL CCD image | [Camille, Thejas]
7 August 2023
|
|
|
599
|
Tue Aug 8 09:38:14 2023 |
Koji | Optics | General | REFL CCD image | It has a higher-order mode, but you can
still extract TEM00 from this beam.
e.g., See a past reflection image |
|
|
115
|
Wed Apr 17 07:30:04 2013 |
Koji | Optics | General | QPD path glued | Yesterday,
all of the glass components for the QPD path
were glued. |
|
|
132
|
Thu May 30 15:00:28 2013 |
Koji | Optics | General | QPD alignment | The QPD alignment was adjusted using
the aligned beam to the cavity and the 4ch
transimpedance amplifier. |
|
|
133
|
Fri May 31 05:46:54 2013 |
Koji | Optics | General | QPD alignment | Peter F suggested to check the bottom surface
of the PD housings if there is any protrusion/interference/whatever.
And that was true! It was found that |
|
|
171
|
Tue Oct 15 18:50:08 2013 |
Koji | Optics | Characterization | QPD alignment | 1) Deburr the bottom surfaces of the QPD
housings
2) Aligned the QPDs |
|
|
258
|
Tue Apr 5 18:14:55 2016 |
Koji | General | Loan / Lending | QPD Lending Crackle | Xiaoyue
QPD head
X-Z stage |
|