TuMag: the tunable magnetograph for the Sunrise III mission

J.C. del Toro Iniesta (1; 2); D. Orozco Su\'arez (1; 2); A.; \'Alvarez-Herrero (1; 3); E. Sanchis Kilders (1; 4); I. P\'erez-Grande; (1; 5); B. Ruiz Cobo (1; 6; 7); L.R. Bellot Rubio (1; 2); M.; Balaguer Jim\'enez (1; 2); A.C. L\'opez Jim\'enez (1; 2); D. \'Alvarez; Garc\'ia (1; 2); J.L. Ramos M\'as (1; 2); J.P. Cobos Carrascosa (1 and; 2); P. Labrousse (1; 2); A.J. Moreno Mantas (1; 2); J.M.; Morales-Fern\'andez (1; 2); B. Aparicio del Moral (1; 2); A. S\'anchez; G\'omez (1; 2); E. Bail\'on Mart\'inez (1; 2); F.J. Bail\'en (1; 2),; H. Strecker (1; 2); A.L. Siu-Tapia (1; 2); P. Santamarina Guerrero (1; and 2); A. Moreno Vacas (1; 2); J. Ati\'enzar Garc\'ia (1; 2); A.J.; Dorantes Monteagudo (1; 2); I. Bustamante (1; 2); A. Tobaruela (1 and; 2); A. Fern\'andez-Medina (1; 3); A. N\'u\~nez Peral (1; 3); M.; Cebollero (1; 3); D. Garranzo-Garc\'ia (1; 3); P. Garc\'ia Parejo (1; and 3); A. Gonzalo Melchor (1; 3); A. S\'anchez Rodr\'iguez (1; 3); A.; Campos-Jara (1; 3); H. Laguna (1; 3); M. Silva-L\'opez (1; 3); J.; Blanco Rodr\'iguez (1; 4); J.L. Gasent Blesa (1; 4); P. Rodr\'iguez; Mart\'inez (1; 4); A. Ferreres (1; 4); D. Gilabert Palmer (1; 4); I.; Torralbo (1; 5); J. Piqueras (1; 5); D. Gonz\'alez-B\'arcena (1; 5),; A.J. Fern\'andez (1; 5); D. Hern\'andez Exp\'osito (1; 6); E. P\'aez; Ma\~n\'a (1; 6); E. Magdaleno Castell\'o (7); M. Rodr\'iguez Valido (7),; Andreas Korpi-Lagg (8; 9); Achim Gandorfer (8); Sami K. Solanki (8),; Thomas Berkefeld (10); Pietro Bernasconi (11); Alex Feller (8); Yukio; Katsukawa (12); Tino L. Riethm\"uller (8); H.N. Smitha (8); Masahito Kubo; (12); Valent\'in Mart\'inez Pillet (13); Bianca Grauf (8); Alexander Bell; (10); Michael Carpenter (11) ((1) Spanish Space Solar Physics Consortium; (2); Instituto de Astrof\'isica de Andaluc\'ia; (3) Instituto Nacional de; T\'ecnica Aeroespacial; (4) Universitat de Val\`encia Estudi General; (5); Instituto de Microgravedad Ignacio da Riva; (6) Instituto de Astrof\'isica de; Canarias; (7) Universidad de La Laguna; (8) Max-Planck-Institut f\"ur; Sonnensystemforschung; (9) Aalto University; Department of Computer Science,; (10) Institut f\'ur Sonnenphysik; (11) Johns Hopkins Applied Physics; Laboratory; (12) National Astronomical Observatory of Japan; (13) National; Solar Observatory)

arXiv:2502.08268·astro-ph.IM·February 13, 2025

TuMag: the tunable magnetograph for the Sunrise III mission

J.C. del Toro Iniesta (1, 2), D. Orozco Su\'arez (1, 2), A., \'Alvarez-Herrero (1, 3), E. Sanchis Kilders (1, 4), I. P\'erez-Grande, (1, 5), B. Ruiz Cobo (1, 6, 7), L.R. Bellot Rubio (1, 2), M., Balaguer Jim\'enez (1, 2), A.C. L\'opez Jim\'enez (1, 2), D. \'Alvarez, Garc\'ia (1

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TL;DR

TuMag is a tunable imaging spectropolarimeter designed for the Sunrise III mission, capable of probing magnetic fields and velocities in the solar photosphere and chromosphere with innovative technologies and high performance.

Contribution

This paper introduces the design, calibration, and integration of TuMag, a novel tunable magnetograph with advanced features for solar magnetic field measurements.

Findings

01

Laboratory tests show wavefront RMS error better than λ/13.

02

Achieved filter profile FWHM of 8.7 pm.

03

Polarimetric efficiencies exceed 0.54.

Abstract

One of the instruments aboard the Sunrise III mission, the Tunable Magnetograph (TuMag), is a tunable imaging spectropolarimeter in visible wavelengths. It is designed to probe the vector magnetic field and the line-of-sight velocity of the photosphere and the lower chromosphere. The quasi-simultaneous observation of two spectral lines provides excellent diagnostic measurements of the magnetic and dynamic coupling in these layers. The key technologies employed for TuMag are an LCVR-based polarimeter and a solid, LiNbO3 Fabry-P\'erot etalon as a spectrometer. However, it also incorporates several innovative features, such as home-made high-sensitivity scientific cameras and a double filter wheel. TuMag can sequentially observe any two out of the three spectral lines of Fe I at 525.02 and 525.06 nm and of Mg I at 517.3 nm. Laboratory measurements have demonstrated outstanding…

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Taxonomy

TopicsOptical Polarization and Ellipsometry · Solar and Space Plasma Dynamics · Scientific Research and Discoveries