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Calibration of Spectropolarimetry Package for Visible Emission Line Coronagraph (VELC) on Board Aditya-L1 Mission.

Authors :
Narra, Venkata Suresh
Hegde, Bhavana
Dasamantarao, Utkarsha
Venkatasubramanian, Natarajan
Somasundaram, Pawan Kumar
Padhavu, Umesh Kamath
Budihal, Raghavendra Prasad
Source :
Journal of Astronomical Instrumentation. Dec2023, Vol. 12 Issue 4, p1-9. 9p.
Publication Year :
2023

Abstract

Visible Emission Line Coronagraph (VELC) is the prime payload on board Aditya-L1 mission. One of the unique capabilities of VELC is the coronal magnetic field measurements from space. To achieve this, VELC performs dual beam spectropolarimetric observations in coronal emission line centered at 10747 Å. Spectropolarimetric channel of VELC consists of different polarimetric components such as quarter waveplate (QWP), polarising beam displacer (PBD) and half waveplate (HWP). Calibration of individual components is essential to ensure that they meet the performance requirements of the payload. This work discusses the details of the calibration tests carried out to evaluate the performance of different polarimetric components of VELC and the results obtained. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
22511717
Volume :
12
Issue :
4
Database :
Academic Search Index
Journal :
Journal of Astronomical Instrumentation
Publication Type :
Academic Journal
Accession number :
174547654
Full Text :
https://doi.org/10.1142/S2251171723500113