The High ORbit Ultraviolet-visible Satellite, HORUS

Date: 
Wednesday, May 25, 2016 - 3:30pm to 4:30pm PDT
Speaker: 
Paul Scowen
Affiliation: 
Arizona State University
Location: 
N232, Room 103
Event Type: 
Colloquium

The High-ORbit Ultraviolet-visible Satellite (HORUS) is a 2.4-meter Probe-class space telescope concept designed to conduct a comprehensive and systematic study of the astrophysical processes and environments relevant for the births and life cycles of stars and their planetary systems, to investigate and understand the range of environments, feedback mechanisms, and other factors that most affect the outcome of the star and planet formation process. HORUS provides 100x greater imaging efficiency and combines the resolution of STIS with the throughput of COS.  The HORUS mission will contribute vital information on how solar systems form and whether habitable planets should be common or rare. It also will investigate the structure, evolution, and destiny of galaxies and the universe. This program relies on focused capabilities unique to space that no other planned NASA mission will provide: near-ultraviolet (UV)/visible (200-1100 nm) wide-field (14' square), diffraction-limited imaging; and high-sensitivity, high-resolution FUV (100-320nm) spectroscopy. From its baseline orbit at L2 HORUS enjoys a stable environment for thermal and pointing control, and long-duration target visibility. The core HORUS design provides wide field of view imagery and high efficiency point source far-ultraviolet (FUV) spectroscopy using a novel combination of spectral selection and field sharing. The HORUS Optical Telescope Assembly (OTA) design uses a three-mirror anastigmatic configuration to provide excellent imagery over a large FOV. The UV/optical Imaging Cameras use two 21k x 21k Focal Plane Arrays (FPAs) consisting of multiple tiled Si CCD elements. The FUV spectrometer uses cross strip anode based microchannel plates (MCPs) improved from HST-COS technology. Fine guidance sensing is accomplished via Si arrays mounted at the Cassegrain focus.

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