BIGFOOT (LC)
ShalikaSingh - 06:44, Monday 17 June 2024 (3611)
Re-characterizing the BS and measuring mirror

Coming across the recent issues with labview and the several modifications, we saw that the observed characteristics of other components look better. Hence, we also chose to re-calibrate the BS

Pol states after LC without BS:

10 avg: C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Polarization states\20240613\Thu, Jun 13, 2024 4-52-27 PM.txt

100 avg: C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Polarization states\20240613\Thu, Jun 13, 2024 5-35-00 PM.txt

Flipped the BS and measure

with 100 avg: C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Beam Splitter Calibration\20240613\BackFaceRefl\10 avg\Fri, Jun 14, 2024 11-52-01 AM.txt

with 10 avg: C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Beam Splitter Calibration\20240613\BackFaceRefl\100 avg\Fri, Jun 14, 2024 1-22-15 PM.txt

The BS was flipped back to its original position

Pol states with BS :

10 avg: C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Polarization states\20240613\Sat, Jun 15, 2024 9-41-39 AM.txt

100 avg:C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Polarization states\20240613\Fri, Jun 14, 2024 10-54-07 PM.txt

Put camera in mirror reflection

I changed the mount of the mirror. Previously, I didn't notice, but I saw that when I rotated the mirror, the beam alignment changed(i.e the beam was rotating around a circumference of a circle) which could indicate that the way rotator mount is placed in the clamp mount, there is some inclination. To avoid discrepancy in considering normal incidence position, I changed the mount to using the mirror mount which is ideally used. 

BB1EO3 sample old :

10 avg: C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Coating measurement\BB1-E03\20240615\10 avg\Sat, Jun 15, 2024 8-17-41 PM.txt

100 avg: C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Coating measurement\BB1-E03\20240615\100 avg\Sat, Jun 15, 2024 5-26-09 PM.txt

Comments related to this report
ShalikaSingh - 11:31, Monday 17 June 2024 (3615)

Replaced mirror with another sample of BB1EO3

10 avg: C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Coating measurement\BB1-EO3 Sample2\20240616\10 avg\Mon, Jun 17, 2024 11-30-53 AM.txt

100 avg: C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Coating measurement\BB1-EO3 Sample2\20240616\100 avg\Mon, Jun 17, 2024 9-08-21 AM.txt

ShalikaSingh - 18:57, Wednesday 19 June 2024 (3616)

I rotated the sample. Although its on non rotatble mount, I took a picture of the back surface for a reference of Sample 2 BB1EO3, before and after rotation.

C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Coating measurement\BB1-EO3 Sample2\20240619\Wed, Jun 19, 2024 6-42-43 PM.txt