| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
574
|
Mon Jul 24 16:12:14 2023 |
Koji | Optics | General | A+ OMC Unit 1 Cavity Build | It is ~1mm from the zero of the micrometer
readings. See attached photos from the 1st
OMC build. |
|
|
573
|
Fri Jul 21 13:42:10 2023 |
Thejas | Optics | General | A+ OMC Unit 1 Cavity Build | 7/21/23
Fringes were observed at the optic-breadboard interface.
This was eliminated by cleaning the interface |
|
|
572
|
Fri Jul 21 03:29:30 2023 |
Koji | Optics | General | A+ OMC optic bench beam layout | Nice measurement. This result suggests
that the fiber mode is supposed to be matched
to the OMC cavity by 99.8% at z0=0.358 m. |
|
|
571
|
Fri Jul 21 00:23:35 2023 |
Thejas | Optics | General | A+ PZT subassembly glue sheets | Below are the gluesheets for the first
four PZT subassembly bonding. |
|
|
570
|
Fri Jul 21 00:07:03 2023 |
Thejas | Optics | General | | [Camille, Thejas, Stephen]
Effort was made to coarsely align
the laser beam into the caivty |
|
|
569
|
Thu Jul 20 14:28:53 2023 |
Thejas | Optics | General | A+ OMC optic bench beam layout | Beam profile of the input beam was measured
at it's beam waist, this is to ensure
the input beam waist matches the cavity |
|
|
568
|
Thu Jul 20 14:14:49 2023 |
Thejas | Optics | General | A+ OMC bonding template alignment | We aligned the bonding template onto the
glass braedboard. This was done with the
help of a vernier caliper and adjusting teh |
|
|
567
|
Wed Jul 19 14:26:17 2023 |
Koji | Optics | General | A+ PZT sub-assemblies | Pens like Sharpie are not recommended to
be used for CLASS B parts. |
|
|
566
|
Wed Jul 19 11:00:56 2023 |
Thejas | Optics | General | A+ OMC Bonding | [Camille, Thejas]
The A+ OMC transport fixture
and optic breadboard was transported to the |
|
|
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
|
|
|
563
|
Tue Jul 18 17:34:45 2023 |
Thejas | Optics | General | A+ PZT sub-assemblies | [Camille, Thejas]
Post sub-assembly bonding of CM
: Madeline will post a separate update on |
|
|
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 |
|
561
|
Thu Jul 13 01:02:58 2023 |
Stephen | Optics | General | A+ OMC, Bonding of Curved Mirror Batch 1 | [2023.07.13 - Stephen, Camille, Thejas,
Maria]
We bonded Curved Mirror assemblies |
16x |
|
560
|
Thu Jul 13 00:38:47 2023 |
Stephen | Optics | Characterization | A+ OMC, PZT DC Response and Length to Angle before Curved Mirror Assy Batch 1 | [2023.07.13]
The attached table includes the
characterization values used to inform the |
|
|
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. |
|
|
558
|
Mon Jul 10 20:52:19 2023 |
Koji | Optics | Characterization | OMC (004) TMS measurement | Belated entry: OMC(004) TMS measurement
with the PZT voltages scanned (Jun 12/15,
2023) |
|
|
557
|
Mon Jul 10 20:29:05 2023 |
Koji | General | Characterization | OMC(004) PZT characterization | Belated entry: OMC(004) PZT Slow
scan / freq response measurements (May 10/11/17,
2023) |
|
|
556
|
Mon Jul 10 20:23:47 2023 |
Koji | Optics | Characterization | OMC (004) Spot positions | Belated entry: OMC(004) Spot positions
(Jun 15, 2023)
Photographs of the spot positions |
10x |
|
555
|
Mon Jul 10 16:15:06 2023 |
Koji | Optics | Characterization | OMC(004) FSR / Finesse | Belated entry: OMC(004) FSR / Finesse
measurement (Jun 13th, 2023)
RFAM Injection (Attachment |
|
|
554
|
Mon Jul 10 16:09:35 2023 |
Koji | Optics | Characterization | OMC(004) FSR / Finesse | Belated entry: OMC(004) FSR / Finesse
measurement (May 3rd, 2023)
1) FSR measurement with |
|
|
553
|
Thu Jul 6 10:19:23 2023 |
Thejas | General | Characterization | OMC Lab optic table | [Camille, Thejas]
The optics table in OMC lab was
cleaned up, cameras and photodiodes used |
|
|
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 |
|
|
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 |
|
|
550
|
Sun Jun 25 21:08:37 2023 |
Koji | General | Characterization | OMC (004) transported to Downs for cable furnishing | OMC (004) + the transport fixture was transported
to Downs 227 with the boxes for OMC cabling
hardware and DCPD/QPD connector parts. |
|
|
549
|
Sun Jun 25 21:04:35 2023 |
Koji | General | Characterization | Optical assembly/testing of OMC (004) completed | Optical assembly/testing of OMC
(004) completed
- OMC (004) with the transport fixture |
|
|
548
|
Wed Jun 21 02:07:24 2023 |
Koji | Electronics | Configuration | OMC(004) QPD adjustment | QPD#
QPD1
QPD2 |
|
|
547
|
Thu Jun 15 13:13:57 2023 |
Koji | Electronics | Configuration | OMC (004) DCPD/QPD preparation | Work
log for June 14, 2023
Selected QPDs from the |
|
|
546
|
Fri Jun 2 17:15:44 2023 |
Stephen | General | General | A+ OMC Build Progress, Weeks of 2023.05.22 and 2023.05.29 | A+ OMC Build efforts ongoing or completed
in the last two weeks:
PZT lead onboard |
|
|
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 |
|
|
544
|
Tue May 23 16:30:09 2023 |
Thejas | Electronics | Characterization | A+ OMC Piezos LA coupling | Oplev setup was built: arm length about
2 m
As the PZT 44 was actuated with |
|
|
543
|
Fri May 19 16:09:31 2023 |
Stephen | General | General | A+ OMC Build Progress, Week of 2023.05.15 | A+ OMC Build efforts ongoing or completed
this week:
PZT lead onboard |
|
|
542
|
Tue May 16 13:07:11 2023 |
Stephen | Optics | Characterization | PZT DC Response with Shadow Sensor - DC Response Qualitative Results, Batch 1 | 12 May 2023, Downs 227
Stephen, Camille, Thejas
We completed a first batch of PZT |
|
|
541
|
Tue May 16 10:26:12 2023 |
Koji | General | Characterization | OMC (004): Final Testing |
FSR measurement (dip) -
done May 3, 2023
FSR
measurement (RFAM injection) - done |
|
|
540
|
Mon May 15 14:24:41 2023 |
Thejas | Optics | Characterization | A+ OMC ROC | Koji's mirror measurement result attached
herewith for comparison.
|
|
|
539
|
Mon May 15 14:20:03 2023 |
Thejas | Optics | Characterization | A+ OMC ROC | Herewith attached are the results
of curved mirror radius of curvature characterization.
|
21x |
|
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.
|
|
|
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 |
|
|
536
|
Fri May 5 18:37:31 2023 |
Stephen | Optics | Characterization | PZT DC Response with Shadow Sensor - First measurement attempt | [Thejas, Camille, Stephen]
In Downs 227 on 05 May 2023
We took the following actions: |
|
|
535
|
Thu May 4 15:12:14 2023 |
Koji | General | Characterization | OMC (004): Final Testing |
FSR measurement (dip) -
done May 3, 2023
FSR
measurement (RFAM injection) - done |
|
|
534
|
Thu May 4 11:39:19 2023 |
Stephen | Optics | Characterization | PZT DC Response with Shadow Sensor - First measurement attempt | Efforts from Tuesday through Thursday Wednesday,
02 through 04 May, are described below.
The main outcomes were: |
|
|
533
|
Tue May 2 12:49:43 2023 |
Stephen | Optics | Characterization | PZT DC Response with Shadow Sensor - First measurement attempt | [Stephen, Camille, Thejas]
A running log of our efforts from
Monday 1 May. Data continues to be placed |
|
|
532
|
Mon May 1 13:30:40 2023 |
Stephen | Optics | Characterization | PZT DC Response with Shadow Sensor - PD Calibration | [Stephen, Camille, Thejas, with support
from Luis]
Calibration reattempted |
|
|
531
|
Fri Apr 28 14:24:03 2023 |
Thejas | Optics | Characterization | A+ OMC Matching | [Thejas, Camille, Stephen]
Here are some notes on how
I plan to approach matching of |
|
|
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 |
|
|
529
|
Wed Apr 26 14:43:44 2023 |
Stephen | General | Loan / Lending | Borrowed Items for PZT DC Response Shadow Sensor Setup | Borrowed for PZT DC Response Shadow Sensor
Setup (see Attachment 1):
Thorlabs PDA100A Photodiode |
|
|
528
|
Wed Apr 26 13:23:00 2023 |
Stephen | Optics | Characterization | PZT DC Response with Shadow Sensor - QPD Calibration | [Stephen, Camille, Thejas, with support
from Marie, Dean, Luis]
We setup a shadow sensor! (Attachment |
|
|
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 |
|
526
|
Wed Apr 19 14:28:08 2023 |
Thejas | Optics | Characterization | A+ OMC Curved mirror radius of curvature | Restimation of the parameters
Camille and I went back to the
lab to re-measure the beam profile follwoing |
|
|
525
|
Tue Apr 18 07:59:46 2023 |
Madeline Lesovsky | General | General | Test Cure Bake - Curved Mirror Subassembly Bonding | This is a test bake conducted in Air Bake
Oven A (ABO-A) held in the 40m Clean and
Bake facility. The overall objective is to |
6x |
|
524
|
Mon Apr 17 17:56:25 2023 |
Thejas | Optics | Characterization | A+ OMC Piezos wedge angle | PZT dimension analyzed and characterized.
The blue dot in the images represents the
position of the cathode. The length of the |
19x |