| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
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: |
|
|
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 |
|
|
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: |
|
|
461
|
Fri Nov 18 18:41:05 2022 |
Camille Makarem | General | General | 2nd deep cleaning of OMC #1 | The four cavity mirrors in OMC #1 were
each scrubbed using acetone and a cotton
swab. |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
522
|
Fri Apr 14 15:52:53 2023 |
Camille Makarem | Optics | Characterization | Determining the curvature bottom of the curved mirrors | [Camille, Thejas]
We repeated Zygo measurements (using
the same setup and method as below) for curved |
|
|
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 |
|
538
|
Fri May 12 10:00:06 2023 |
Camille Makarem | General | Loan / Lending | Borrowed Items for PZT DC Response Shadow Sensor Setup | The ThorLabs MDT694B piezo driver was returned
to the OMC lab.
|
|
|
545
|
Fri Jun 2 13:28:09 2023 |
Camille Makarem | Electronics | | PZT op-lev measurements | The op-lev setup was modified slightly
(picture attached). The He-Ne laser was replaced
with one with a lower divergence angle. The |
|
|
551
|
Fri Jun 30 10:30:57 2023 |
Camille Makarem | Electronics | | Summary of DC response measurements | [Camille, Thejas, Stephen]
The DC response of the PZT was
measured using the following setup (pictures |
|
|
552
|
Fri Jun 30 10:55:45 2023 |
Camille Makarem | Electronics | Characterization | Summary of PZT reliability test procedure | [Camille, Thejas, Stephen]
To test the reliability of the
PZTs, they were driven for 10^7 cycles. (At |
|
|
562
|
Mon Jul 17 10:15:56 2023 |
Camille Makarem | Electronics | Characterization | PZT Reliability Test Results (part 1 of 2) | [Camille, Thejas, Stephen]
Results for PZT reliability tests:
Batch 1: SN37, SN38, SN39, SN44 |
10x |
|
564
|
Wed Jul 19 08:38:07 2023 |
Camille Makarem | Electronics | Characterization | PZT Reliability Test Results (part 2 of 2) | Results for PZT reliability test:
Batch 3: SN31, SN32, SN35, SN40, SN45
|
|
|
579
|
Wed Jul 26 12:14:53 2023 |
Camille Makarem | Optics | Configuration | Swapping Subassemblies | While using mirror SN14 and mirror SN30
for CM1 and CM2 respectively, we monitored
the two beam spots on FM2 and continued to |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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.
|
|
|
597
|
Tue Aug 8 07:30:49 2023 |
Camille Makarem | Optics | General | REFL CCD image | [Camille, Thejas]
7 August 2023
|
|
|
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
|
|
|
602
|
Wed Aug 9 17:00:52 2023 |
Camille Makarem | Optics | General | cleaning the cavity optics | [Camille, Thejas]
We inspected surfaces of the cavity |
|
|
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 |
|
|
604
|
Fri Aug 11 10:42:05 2023 |
Camille Makarem | Optics | Characterization | power budget measurements | [Camille, Thejas]
10 August 2023
|
|
|
605
|
Mon Aug 14 07:52:11 2023 |
Camille Makarem | Optics | General | 2nd cleaning of the cavity optics | [Camille, Thejas]
11 August 2023
|
|
|
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 |
|
|
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 |
|
|
608
|
Thu Aug 17 07:57:12 2023 |
Camille Makarem | Optics | General | mode-matching in the cavity | [Camille, Thejas, Koji]
16 August 2023
|
|
|
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
|
|
|
610
|
Mon Aug 21 07:59:40 2023 |
Camille Makarem | Optics | General | cavity realignment and new power measurements | [Camille, Thejas]
18 August 2023
|
6x |
|
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. |
|
|
618
|
Thu Aug 24 16:09:46 2023 |
Camille Makarem | Optics | General | PZT length-to-angle coupling | [Camille, Thejas]
We checked the length-to-angle coupling |
|
|
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 |
|
|
616
|
Wed Aug 23 07:48:14 2023 |
Camille Makarem, Tejas | Optics | Characterization | FSR and TMS measuarement of A+ build | [Camille, Thejas]
22 August 2023
|
|
|
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 |
|
|
617
|
Thu Aug 24 12:30:58 2023 |
Camille Makarem, Thejas | Optics | Characterization | FSR and TMS analysis | Attached are the analysis results from
the measurements in 616.
FSR: 264.657354 +/- 0.003444 MHz |
|
|
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 |
|
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 |
|
|
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 |
|
|
346
|
Thu Apr 18 20:47:54 2019 |
Joe | Optics | | OMC initial alignment and locking | [Joe, Phillip, Koji, Stephen]
*draft post, please add anymore
info if I missed something* |
|
|
348
|
Fri Apr 19 09:35:28 2019 |
Joe | General | | Adjusting cavity axis, re-alignment of OMC and locking | [koji,philip,
joe, liyuan,
steven] |
|
|
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 |
|
|
353
|
Tue Apr 23 10:21:12 2019 |
Joe | Optics | Configuration | Moving the spots to the centre of the curved mirrors | [Koji,Philip, Liyuan, Joe]
CM1:
We moved the curved mirrors to |
|
|
354
|
Wed Apr 24 13:58:51 2019 |
Joe | Optics | Characterization | OMC power budget and UV Epoxy Bonding of BS1 | [koji,philip,joe,liyuan,stephen]
need to add spot positions.
Mirrors: PZT11,PZT22, A14, A5 |
|