EUVI: the STEREO-SECCHI extreme ultraviolet imager

TLDR

The Extreme Ultraviolet Imager (EUVI) is part of the SECCHI instrument suite for the NASA STEREO mission, and the SECCHI investigation is led by the Naval Research Lab. Identical EUVI telescopes on the two STEREO spacecraft will study the structure and evolution of the solar corona in three dimensions, focusing on the initiation and early evolution of coronal mass ejections. The EUVI telescope, developed at Lockheed Martin Solar and Astrophysics Lab, features 2048 × 2048 pixel detectors with a 1.7‑solar‑radius field of view and observes in four spectral channels spanning 0.1 to 20 MK. EUVI will provide a substantial improvement in image resolution and cadence over its predecessor SOHO‑EIT while meeting the stricter mass, power, and volume constraints of the STEREO mission.

Abstract

The Extreme Ultraviolet Imager (EUVI) is part of the SECCHI instrument suite currently being developed for the NASA STEREO mission. Identical EUVI telescopes on the two STEREO spacecraft will study the structure and evolution of the solar corona in three dimensions, and specifically focus on the initiation and early evolution of coronal mass ejections (CMEs). The EUVI telescope is being developed at the Lockheed Martin Solar and Astrophysics Lab. The SECCHI investigation is led by the Naval Research Lab. The EUVI's 2048 x 2048 pixel detectors have a field of view out to 1.7 solar radii, and observe in four spectral channels that span the 0.1 to 20 MK temperature range. In addition to its view from two vantage points, the EUVI will provide a substantial improvement in image resolution and image cadence over its predecessor SOHO-EIT, while complying with the more restricted mass, power, and volume allocations on the STEREO mission.