| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
454
|
Mon Nov 14 08:34:45 2022 |
Camille | Optics | Characterization | transmission measurements through OMC #1 (before cleaning) | [Camille, Koji]
Friday, Nov 11th, 2022
Setting up OMC #1 for transmission |
|
|
455
|
Mon Nov 14 09:27:13 2022 |
Koji | Optics | Characterization | transmission measurements through OMC #1 (before cleaning) | The measured total optical loss of the
OMC was
1st: 0.015 +/- 0.003 |
|
|
527
|
Mon Apr 24 15:29:48 2023 |
Camille Makarem | Optics | | summary of zygo setups | Summary of Zygo setups
Initial Zygo Setup:
Our initial Zygo setup consisted of |
6x |
|
598
|
Tue Aug 8 07:39:17 2023 |
Camille Makarem | Optics | General | steering the beam spot on the curved mirrors | [Camille, Thejas]
7 August 2023
|
|
|
600
|
Tue Aug 8 10:42:11 2023 |
Thejas | Optics | General | steering the beam spot on the curved mirrors | The spots look quite bright on the CMs,
we need to move the spots towards the center
of the mirorrs to avoid scatter points. |
|
|
601
|
Wed Aug 9 07:47:21 2023 |
Camille, Thejas | Optics | General | steering the beam spot on the curved mirrors | [Camille, Thejas, Masayuki]
8 August 2023
|
7x |
|
583
|
Tue Aug 1 11:04:13 2023 |
Camille Makarem | General | General | reoptimizing cavity alignment before locking | [Camille, Thejas]
We rechecked the alignment this morning
and re-optimized the resonance a bit. There |
|
|
609
|
Thu Aug 17 09:06:51 2023 |
Camille Makarem | Optics | General | realignment of beam path through mode-matching lenses | [Camille, Thejas]
16 August 2023
|
|
|
604
|
Fri Aug 11 10:42:05 2023 |
Camille Makarem | Optics | Characterization | power budget measurements | [Camille, Thejas]
10 August 2023
|
|
|
582
|
Mon Jul 31 13:19:14 2023 |
Camille Makarem | General | General | plans for this week 31 July 2023 | Plans for this week:
1) Verify electronics setup for cavity
locking. |
|
|
585
|
Thu Aug 3 07:22:19 2023 |
Camille Makarem | General | General | particle count and cavity optimization/alignment | Yesterday, we measured the particle count
in the enclosure to ensure that the lower
setting on one of the HEPAs is still acceptable. |
|
|
591
|
Mon Aug 7 07:36:09 2023 |
Camille Makarem | General | General | particle count | [Camille, Thejas]
We lowered the setting to MEDIUM on |
|
|
603
|
Thu Aug 10 12:33:42 2023 |
Camille Makarem | Optics | General | optimizing the cavity post-cleaning | [Camille, Thejas]
This morning, we continued the efforts |
|
|
592
|
Mon Aug 7 07:40:33 2023 |
Camille Makarem | Optics | General | optimizing reflected signal | [Camille, Thejas] 4 August 2023
-REFL PD signal (unlocked): 3.5V |
|
|
593
|
Mon Aug 7 08:37:59 2023 |
Koji | Optics | General | optimizing reflected signal | With the current level of the mode
matching, the spot positions can be optimized.
I'd work on it first as the mirror RoC |
|
|
594
|
Mon Aug 7 08:51:56 2023 |
Camille Makarem | Optics | General | optimizing reflected signal | We will plan to look at the reflection
CCD image this afternoon.
|
|
|
607
|
Tue Aug 15 16:15:13 2023 |
Camille Makarem | Optics | General | new power measurements (after cleaning) | [Camille, Thejas, Masayuki]
This afternoon we finished the realignment |
|
|
606
|
Mon Aug 14 14:13:34 2023 |
Camille Makarem | Optics | General | mode-mismatch in the cavity | For Set 1 of the data in https://nodus.ligo.caltech.edu:8081/OMC_Lab/604,
VREFL(unlocked) = 3.226V
VREFL(locked) = 0.13V |
|
|
608
|
Thu Aug 17 07:57:12 2023 |
Camille Makarem | Optics | General | mode-matching in the cavity | [Camille, Thejas, Koji]
16 August 2023
|
|
|
362
|
Thu May 16 12:41:28 2019 |
Chub | General | General | fire pillow found on optics table | That is an expanding fire pillow, also
known as firebrick. It is used to create
a fire block where holes in fire-rated walls |
|
|
107
|
Wed Apr 10 00:40:30 2013 |
Zach | Optics | Configuration | fauxMC locked | [Koji, Zach]
|
|
|
67
|
Tue Mar 5 19:37:00 2013 |
Zach | Optics | Characterization | eLIGO OMC visibility vs. power measurement details | EDIT (ZK): Koji points out that (1 -
Ti) should really be the non-resonant reflectivity
of the aligned cavity, which is much closer |
|
|
68
|
Wed Mar 6 23:24:58 2013 |
Zach | Optics | Characterization | eLIGO OMC visibility vs. power measurement details | I found that, in fact, I had lowered
the modulation depth since when I measured
it to be 0.45 rads --> Psb = 0.1. |
|
|
602
|
Wed Aug 9 17:00:52 2023 |
Camille Makarem | Optics | General | cleaning the cavity optics | [Camille, Thejas]
We inspected surfaces of the cavity |
|
|
456
|
Tue Nov 15 07:46:58 2022 |
Camille Makarem | Optics | General | cleaning OMC #1 | Monday, November 14, 2022
Camille and Koji did a "deep
cleaning" of OMC#1: |
|
|
610
|
Mon Aug 21 07:59:40 2023 |
Camille Makarem | Optics | General | cavity realignment and new power measurements | [Camille, Thejas]
18 August 2023
|
6x |
|
611
|
Mon Aug 21 15:02:32 2023 |
Koji | Optics | General | cavity realignment and new power measurements | This is WOW!
Excellent mode matching work.
The measurement is still |
|
|
612
|
Mon Aug 21 16:05:07 2023 |
Camille Makarem | Optics | Characterization | cavity realignment and new power measurements | Thanks for clarifying that. We will repeat
some power measurements and check the output
offset voltage to the laser. |
|
|
613
|
Mon Aug 21 16:15:09 2023 |
Koji | Optics | Characterization | cavity realignment and new power measurements | You should proceed to the next steps. You'll
need to repeat the power measurements before
the bonding. Next time, the measurement procedure |
|
|
614
|
Tue Aug 22 10:25:10 2023 |
Thejas | Optics | Characterization | cavity realignment and new power measurements | Thanks Koji, we did observe this discrepency
and thought that the code normalizes the
power/voltage readings to the reference power |
|
|
588
|
Thu Aug 3 15:04:26 2023 |
Stephen | General | General | aLIGO Unit 4 Build, Cable Routing, Preparation | [Dean, Stephen]
Unit #4 aLIGO OMC unit
was transported to the 40m Bake Lab. |
|
|
530
|
Fri Apr 28 13:25:40 2023 |
Thejas | Optics | General | aLIGO OMC Unit-4 | [Camille, Koji, Thejas]
Yesterday, we cleaned the cavity
optics with first contact, aligned the input |
|
|
537
|
Thu May 11 10:46:17 2023 |
Thejas | General | Characterization | aLIGO OMC | [Thejas, Camille, Koji]
We aligned the laser beam to the
cavity and drove the OMC cavity PZTs (0 to |
|
|
291
|
Thu Feb 22 20:21:02 2018 |
Koji | Optics | Characterization | aLIGO EOM test | POSTED
to 40m ELOG |
|
|
292
|
Mon Apr 2 17:27:04 2018 |
Koji | Optics | Characterization | aLIGO EOM test | 2nd optical test http://nodus.ligo.caltech.edu:8080/40m/13725 |
|
|
153
|
Fri Aug 16 17:21:38 2013 |
Koji | General | General | [OMC002] Build started | [Jeff Koji]
The breadboard (SN2) was loaded
on the transportation fixture. |
|
|
74
|
Wed Mar 20 09:38:02 2013 |
Zach | Optics | Characterization | [LLO] OMC test bench modified | For various reasons, I had to switch
NPROs (from the LightWave 126 to the Innolight
Prometheus). |
|
|
146
|
Tue Jun 18 15:45:38 2013 |
Koji | General | General | [LLO] OMC installation in HAM6 | OMC installed
in HAM6! |
|
|
140
|
Fri Jun 7 16:04:44 2013 |
Koji | General | General | [LLO] OMC arrived | [Koji Zach Suresh]
The OMC arrived at LLO without any
destruction! |
|
|
143
|
Thu Jun 13 12:12:20 2013 |
Zach | General | General | [LLO] OMC and OMCS in LVEA | https://alog.ligo-la.caltech.edu/aLOG/index.php?callRep=7395
|
|
|
141
|
Mon Jun 10 10:04:37 2013 |
Koji | General | General | [LLO] OMC Test | [Koji Zach]
We worked on the OMC test over
the weekend. |
|
|
142
|
Thu Jun 13 12:04:57 2013 |
Koji | General | General | [LLO] OMC Optical Test - completed | https://alog.ligo-la.caltech.edu/aLOG/index.php?callRep=7373 |
|
|
144
|
Fri Jun 14 06:35:21 2013 |
Jeff | General | General | [LLO] L1 OMC status | https://alog.ligo-la.caltech.edu/aLOG/index.php?callRep=7410
Weights:
Suspension cage and transportation |
|
|
521
|
Thu Apr 13 07:47:28 2023 |
Camille Makarem | Optics | Characterization | Zygo setup for curved mirror measurements | [Camille, Thejas, Stephen]
We modified the Zygo setup for
measuring the sagitta of the curved mirrors. |
|
|
19
|
Wed Aug 22 20:16:43 2012 |
Koji | Facility | General | Workbenches have been installed / Clean room stools | Last Friday, new workbenches were installed.
Vladimir got a new table and a cleanroom
stool. |
|
|
300
|
Mon Jul 2 15:27:31 2018 |
Rich Abbott | Electronics | General | Work on EOM (3rd IFO unit) | Koji, Rich
We took apart the unit removed
from the 3rd IFO (Unit serial number aLIGO |
|
|
33
|
Wed Nov 7 20:21:42 2012 |
Koji | General | General | Work completed in October [!] | Completed work of the previous months:
[Jul]
[Aug] |
|
|
47
|
Mon Dec 31 01:45:04 2012 |
Koji | General | General | Work completed in Nov and Dec [!] | Completed work of the previous months:
[Jul]
[Aug] |
|
|
12
|
Tue Jul 31 21:29:43 2012 |
Koji | General | General | Work completed in July [!] |
Completed Work: Facility/Supplies
|
|
|
28
|
Tue Oct 16 15:50:09 2012 |
Koji | General | General | Work completed in August/September [!] |
Work done
|
|