Background simulations for the high energy x-ray probe (HEX-P)

Kristin K. Madsen; Henrike Fleischhack; Daniel P. Violette; Brian W. Grefenstette; Andreas Zoglauer; Jonathan Arenberg; Benjamin Donovan; Patrick Morrissey; Daniel Stern

doi:10.1117/12.2676891

5 October 2023 Background simulations for the high energy x-ray probe (HEX-P)

Kristin K. Madsen, Henrike Fleischhack, Daniel P. Violette, Brian W. Grefenstette, Andreas Zoglauer, Jonathan Arenberg, Benjamin Donovan, Patrick Morrissey, Daniel Stern

Author Affiliations +

Proceedings Volume 12678, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIII; 126781B (2023) https://doi.org/10.1117/12.2676891
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Conference Poster

Abstract

HEX-P is an x-ray probe-class mission concept that will combine high angular resolution (⪅15 arcsec) with broad band spectral coverage (0.2 - 80 keV) to enable revolutionary new insights into the important astrophysical questions of the next decade identified by the 2020 Decadal Survey. Sensitivity is key to the instrument performance and estimating the background a crucial step in the development of the design and prediction of the instrument performance. The HEX-P orbit is at L1, and since L1 has hosted no prior missions with x-ray coverage that can be used to estimate the background level, the particle background has to be simulated. We present here the simulations done to evaluate the contribution to the background from charged particles, which show that the high energy background is dominated by hadronic activation in the detector mass and prompt leptons. To reduce the additional Cosmic X-ray Background (CXB), which is non-charged, the instruments are fitted with apertures and blocking plates of a graded-Z material to attenuate the CXB to a level an order of magnitude below the requirement.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Kristin K. Madsen, Henrike Fleischhack, Daniel P. Violette, Brian W. Grefenstette, Andreas Zoglauer, Jonathan Arenberg, Benjamin Donovan, Patrick Morrissey, and Daniel Stern "Background simulations for the high energy x-ray probe (HEX-P)", Proc. SPIE 12678, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIII, 126781B (5 October 2023); https://doi.org/10.1117/12.2676891

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