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5 - 10 July 2026
Copenhagen, Denmark
Conference 14145 > Paper 14145-198
Paper 14145-198

Black Hole Explorer (BHEX) signal processing and instrument control electronics

7 July 2026 • 17:30 - 19:00 CEST | Room B4-M3

Abstract

The Black Hole Explorer is a new mission that will discover and measure a black hole’s photon ring, capturing light that has orbited a black hole. This paper describes the development of the backend electronics of the Black Hole Explorer (BHEX) instrument, which is called the “Signal Processing and Instrument Control Electronics” (SPICE).The functional and physical architecture are described with motivation for their design, including critical trades and design decisions made to satisfy the established SPICE requirements.

Presenter

Samantha Gray
Ctr. for Astrophysics | Harvard & Smithsonian (United States)
Ranjani Srinivasan is the Director of Central Engineering at the Smithsonian Astrophysical Observatory. Ranjani began her professional career at the Hawaii office of the Academia Sinica Institute for Astronomy and Astrophysics. She became deeply involved in instrument development for several major observatories, including the Submillimeter Array (SMA), the YT Lee Array (YTLA), the Atacama Large Millimeter/Submillimeter Array (ALMA), and the Greenland Telescope (GLT). Ranjani later joined SAO, where she initially led backend electronics development for the next-generation Event Horizon Telescope (ngEHT), one of SAO’s flagship projects. In addition to her leadership responsibilities, she currently serves as the lead engineer for the backend signal processing subsystem of the Black Hole Explorer (BHEx). She was also part of the international team that captured the first image of a black hole, an achievement that was honored with the Breakthrough Prize in Fundamental Physics.
Author
Ctr. for Astrophysics | Harvard & Smithsonian (United States)
Presenter/Author
Samantha Gray
Ctr. for Astrophysics | Harvard & Smithsonian (United States)
Author
Ctr. for Astrophysics | Harvard & Smithsonian (United States)
Author
Ryan Chaves
Ctr. for Astrophysics | Harvard & Smithsonian (United States)
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Manuel Fernandez
Ctr. for Astrophysics | Harvard & Smithsonian (United States)
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Janice Houston
Ctr. for Astrophysics | Harvard & Smithsonian (United States)
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Michael Johnson
Ctr. for Astrophysics | Harvard & Smithsonian (United States)
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Rebecca Baturin
Ctr. for Astrophysics | Harvard & Smithsonian (United States)
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Ctr. for Astrophysics | Harvard & Smithsonian (United States)
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Supermassive Technologies, LLC (United States)
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MIT Haystack Observatory (United States)
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Peter Galison
Black Hole Initiative, Harvard Univ. (United States)
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Steward Observatory, The Univ. of Arizona (United States)
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Steward Observatory, The Univ. of Arizona (United States)
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Steward Observatory, The Univ. of Arizona (United States)
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Eli A. Zervigon
Steward Observatory, The Univ. of Arizona (United States)
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Fidus Systems Inc. (Canada)
Author
Fidus Systems Inc. (Canada)
Author
Fidus Systems Inc. (Canada)
Author
Fidus Systems Inc. (Canada)