End-to-end tests of the TuMag instrument for the SUNRISE III mission

Alberto Álvarez Herrero; Daniel Garranzo-García; Armonía Núnez; Manuel Silva-López; Antonio Campos-Jara; Pilar García Parejo; María Cebollero; Julia Atienzar; Francisco J. Bailén; Julian Blanco Rodríguez; Pablo Santamarina; David Orozco Suárez; Jose Carlos del Toro Iniesta

doi:10.1117/12.2629272

29 August 2022 End-to-end tests of the TuMag instrument for the SUNRISE III mission

Alberto Álvarez Herrero, Daniel Garranzo-García, Armonía Núnez, Manuel Silva-López, Antonio Campos-Jara, Pilar García Parejo, María Cebollero, Julia Atienzar, Francisco J. Bailén, Julian Blanco Rodríguez, Pablo Santamarina, David Orozco Suárez, Jose Carlos del Toro Iniesta

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121842F (2022) https://doi.org/10.1117/12.2629272
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

SUNRISE III mission is a one-meter aperture telescope onboard a balloon within NASA Long Duration Balloon Program. Three post-focus instruments are used for studying the Sun’s dynamics and magnetism, among which the Tunable Magnetograph (TuMag) is a tunable imaging spectropolarimeter. TuMag is a diffraction-limited imager, a high sensitivity polarimeter (< 10-3 ), and a high-resolution spectrometer ( ~ 65 mÅ). It will be able to study solar magnetic fields at high spatial resolution (~100 km on the solar surface). It will make images of the solar surface magnetic field after measuring the state of polarization of light within three selected spectral lines: the Fe I lines at 525.02 nm and 525.06 nm, and the Mg I b2 line at 517.27 nm. It will be sensitive to the solar vector magnetic fields and line-of-sight velocities, in the photospheric and chromospheric layers. TuMag will be the first solar magnetograph onboard an aerospace platform with the capability of tuning the solar line to be observed. In this paper the TuMag end-to-end tests carried out during the verification phase are described. These tests are performed to characterize and calibrate the instrument. Specifically, they determine the polarimetric and spectroscopic performances of the instrument as well as the image quality. The availability of a singular facility, an ISO6 clean room with a coelostat on the building roof, allowed the use of solar light during the verification campaign. This was key to a complete instrument verification due to the unique spectroscopic and polarimetric characteristics of solar light.

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Alberto Álvarez Herrero, Daniel Garranzo-García, Armonía Núnez, Manuel Silva-López, Antonio Campos-Jara, Pilar García Parejo, María Cebollero, Julia Atienzar, Francisco J. Bailén, Julian Blanco Rodríguez, Pablo Santamarina, David Orozco Suárez, and Jose Carlos del Toro Iniesta "End-to-end tests of the TuMag instrument for the SUNRISE III mission", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121842F (29 August 2022); https://doi.org/10.1117/12.2629272

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