Curved detectors for future x-ray astrophysics missions

Eric D. Miller; James A. Gregory; Marshall W. Bautz; Harry R. Clark; Michael Cooper; Kevan Donlon; Richard F. Foster; Catherine E. Grant; Mallory Jensen; Beverly LaMarr; Renee Lambert; Christopher Leitz; Andrew Malonis; Mo Neak; Gregory Prigozhin; Kevin Ryu; Benjamin Schneider; Keith Warner; Douglas J. Young; William W. Zhang

doi:10.1117/12.3018475

21 August 2024 Curved detectors for future x-ray astrophysics missions

Eric D. Miller, James A. Gregory, Marshall W. Bautz, Harry R. Clark, Michael Cooper, Kevan Donlon, Richard F. Foster, Catherine E. Grant, Mallory Jensen, Beverly LaMarr, Renee Lambert, Christopher Leitz, Andrew Malonis, Mo Neak, Gregory Prigozhin, Kevin Ryu, Benjamin Schneider, Keith Warner, Douglas J. Young, William W. Zhang

Author Affiliations +

Proceedings Volume 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray; 130935P (2024) https://doi.org/10.1117/12.3018475
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Future X-ray astrophysics missions will survey large areas of the sky with unparalleled sensitivity, enabled by lightweight, high-resolution optics. These optics inherently produce curved focal surfaces with radii as small as 2 m, requiring a large area detector system that closely conforms to the curved focal surface. We have embarked on a project using a curved charge-coupled device (CCD) detector technology developed at MIT Lincoln Laboratory to provide large-format, curved detectors for such missions, improving performance and simplifying design. We present the current status of this work, which aims to curve back-illuminated, large-format (5 cm x 4 cm) CCDs to 2.5-m radius and confirm X-ray performance. We detail the design of fixtures and the curving process, and present initial results on curving bare silicon samples and monitor devices and characterizing the surface geometric accuracy. The tests meet our accuracy requirement of <5 μm RMS surface non-conformance for samples of similar thickness to the functional detectors. We finally show X-ray performance measurements of planar CCDs that will serve as a baseline to evaluate the curved detectors. The detectors exhibit low noise, good charge-transfer efficiency, and excellent, uniform spectroscopic performance, including in the important soft X-ray band.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Eric D. Miller, James A. Gregory, Marshall W. Bautz, Harry R. Clark, Michael Cooper, Kevan Donlon, Richard F. Foster, Catherine E. Grant, Mallory Jensen, Beverly LaMarr, Renee Lambert, Christopher Leitz, Andrew Malonis, Mo Neak, Gregory Prigozhin, Kevin Ryu, Benjamin Schneider, Keith Warner, Douglas J. Young, and William W. Zhang "Curved detectors for future x-ray astrophysics missions", Proc. SPIE 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray, 130935P (21 August 2024); https://doi.org/10.1117/12.3018475

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