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Title: DESIGN AND MEASUREMENT OF THE STOKES POLARIMETER FOR THE COSMO K-CORONAGRAPH

We present the Stokes polarimeter for the new Coronal Solar Magnetism Observatory K-coronagraph. The polarimeter can be used in two modes. In observation mode, it is sensitive to linear polarization only and operates as a ''Stokes definition'' polarimeter. In the ideal case, such a modulator isolates a particular Stokes parameter in each modulation state. For calibrations, the polarimeter can diagnose the full Stokes vector. We present here the design process of the polarimeter, analyze its tolerances with a Monte Carlo method, develop a way to align the individual elements, and measure and evaluate its performance in both modes.
Authors:
 [1] ; ;  [2]
  1. Key Laboratory of Solar Activity, National Astronomical Observatories of Chinese Academy of Sciences, 20A Datun Road, Beijing 100012 (China)
  2. High Altitude Observatory, National Center for Atmospheric Research, P. O. Box 3000, Boulder, CO 80307 (United States)
Publication Date:
OSTI Identifier:
22133936
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 774; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CALIBRATION; DESIGN; MAGNETISM; MODULATION; MONTE CARLO METHOD; PERFORMANCE; POLARIMETERS; POLARIZATION; STOKES PARAMETERS; TOLERANCE