SOLARIS: Solar Sail Investigation of the Sun
Thierry Appourchaux, Fr\'ed\'eric Auch\`ere, Ester Antonucci, Laurent, Gizon, Malcolm MacDonald, Hirohisa Hara, Takashi Sekii, Daniel Moses and, Angelos Vourlidas

TL;DR
The paper proposes the SOLARIS mission utilizing solar sail technology to study the Sun's magnetic field, irradiance, and corona, outlining objectives, payload, mission profile, and implementation considerations.
Contribution
It introduces a novel solar sail-based mission concept, detailing scientific goals, payload design, and mission planning for solar observation.
Findings
Mission profile with trade-offs outlined
Tentative mass budget provided
Feasibility of solar sail technology for solar studies demonstrated
Abstract
In this paper, we detail the scientific objectives and outline a strawman payload of the SOLAR sail Investigation of the Sun (SOLARIS). The science objectives are to study the 3D structure of the solar magnetic and velocity field, the variation of total solar irradiance with latitude, and the structure of the corona. We show how we can meet these science objective using solar-sail technologies currently under development. We provide a tentative mission profile considering several trade-off approaches. We also provide a tentative mass budget breakdown and a perspective for a programmatic implementation.
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