PoS - Proceedings of Science
Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Gamma-ray Astronomy (GA)
A-STEP for AstroPix : Development and Test of a space-based payload using novel pixelated silicon for gamma-ray measurement
A.L. Steinhebel*, N. Striebig, M. Jadhav, D. Violette, D. Durachka, R. Boggs, L. Seo, S. Hesh, Y. Suda, T. Shin, Z. Metzler, C. Kierans, R. Caputo, H. Tajima, Y. Fukazawa, R. Leys, I. Peric, J. Metcalfe and J.S. Perkins
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Pre-published on: August 09, 2023
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Next-generation medium-energy gamma-ray instruments sensitive from 25 keV to 1 GeV must be able to measure and reconstruct incident photons in the photoabsorption, Compton, and pair- production regimes. Such robust functionality requires a tracker with high resolution, low noise, and low power. The monolithic CMOS active pixel silicon sensor AstroPix is a novel mission- enabling technology. AstroPix will provide the energy- and angular-resolution required of a medium-energy gamma-ray telescope while reducing noise with the dual detection-and-readout capabilities of an HVCMOS chip. Plans for A-STEP, a funded AstroPix Technology dEmonstration Payload designed for flight on a sounding rocket, will be presented. This roughly 2U-sized payload will include three layers of AstroPix quad-chips for cosmic ray and gamma ray detection and tracking. This technology demonstration mission also strengthens the design readiness of AMEGO-X, a MIDEX-sized MeV telescope mission concept. Additional supplementary development and testing of the AstroPix project will also be considered, including A-STEP simulation efforts for environment and detector response modeling.
DOI: https://doi.org/10.22323/1.444.0579
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