| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
503
|
Tue Mar 7 23:00:16 2023 |
Thejas | Optics | Characterization | OMC Lab clean up | Today, Koji and I cleaned up the the lab
space and made some space on the
optical table for radius of curvature measurement |
|
|
504
|
Wed Mar 8 17:27:51 2023 |
Thejas | Optics | Characterization | A+ OMC Curvature minimum of curved optics | [Stephen, Thejas]
Today, a more rigorous effort was
made to re-measure the position of the optics |
|
|
505
|
Fri Mar 10 10:23:08 2023 |
Thejas | Optics | Characterization | A+ OMC curved mirror radius of curvature | OMC test set-up
Yesterday, laser beam output from
the fibre follwoing teh mode-matching lenses |
|
|
506
|
Fri Mar 10 11:12:57 2023 |
Thejas | Optics | Characterization | A+ OMC Curvature minimum of curved optics | [GariLynn, Stephen, Thejas]
Yesterday, we placed an iris (borrowed
from OMC Lab) infront of the spherical transmission |
|
|
507
|
Tue Mar 14 10:41:06 2023 |
Thejas | Optics | Characterization | A+ OMC curved mirror characterization | [Camille, GarriLynn, Stephen, Thejas]
Folllowing the replacement of the
spherical transmission / reference mirror |
|
|
508
|
Tue Mar 14 12:12:41 2023 |
Koji | Optics | Characterization | A+ OMC curved mirror characterization | RoC: 2.65m ! Interesting. I'll wait
for the follow-up analysis/measurements.
The RoC may be dependent on the area (diameter) |
|
|
509
|
Tue Mar 14 18:24:03 2023 |
Thejas | Optics | Characterization | A+ OMC Curved mirror radius of curvature | Today, I tried to measure the radius of
curvature of the curved mirror using the
input beam for the OMC test set-up. It was |
|
|
510
|
Tue Mar 14 20:06:03 2023 |
Koji | Optics | Characterization | A+ OMC Curved mirror radius of curvature | If the mirror has the RoC, it works as
a lens. And you should be able to see the
effect in the beam profile. |
|
|
511
|
Wed Mar 15 15:28:24 2023 |
Thejas | Optics | Characterization | A+ OMC Curved mirror radius of curvature | Thanks for teh comment Koji. Yes, I did
see this effect by comparing the beam sizes
with and without the curved mirror. But the |
|
|
512
|
Wed Mar 15 17:07:35 2023 |
Koji | Optics | Characterization | A+ OMC Curved mirror radius of curvature | I hope you can find useful lenses from
the lens kit in the cabinet. If you need
more lenses and mounts, talk to our students |
|
|
513
|
Fri Mar 17 15:01:21 2023 |
Koji | Optics | Characterization | A+ OMC Curved mirror radius of curvature | Thanks Koji, the lenses available in the
cabinet in the lab actually sufficed.
|
|
|
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 |
|
|
517
|
Mon Apr 3 11:06:47 2023 |
Thejas | Optics | Characterization | Flat mirror flatness | Data can be found in DCC document T2300050.
On Friday. Camille and I measured |
|
|
518
|
Tue Apr 4 16:14:06 2023 |
Koji | Optics | Loan / Lending | C7 mirror to Downs | I handed Camille the C7 mirror for the
cross-calibration of the ROC characterization
techniques. |
|
|
519
|
Wed Apr 5 22:09:30 2023 |
Koji | Facility | General | HEPA Enclosure extension | Chub finished the HEPA enclosure extension
project. |
|
|
520
|
Tue Apr 11 16:18:25 2023 |
Thejas | Optics | Characterization | A+ OMC Curved mirror radius of curvature | Curved mirror radius of curvature raw data
can be found in the DCC document: T2300050
The input beam falling on the curved |
|
|
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 |
|
|
523
|
Fri Apr 14 16:36:29 2023 |
Thejas | Optics | Characterization | Determining the curvature bottom of the curved mirrors | Attached here with are relevant plots.
|
21x |
|
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 |
|
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 |
|
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 |
|
|
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 |
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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: |
|
|
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 |
|
|
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: |
|
|
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 |
|
|
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.
|
|
|
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 |
|
540
|
Mon May 15 14:24:41 2023 |
Thejas | Optics | Characterization | A+ OMC ROC | Koji's mirror measurement result attached
herewith for comparison.
|
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|