Filters design and characterization for LAD instrument onboard eXTP

Ugo Lo Cicero; Marco Barbera; Nicola Montinaro; Fabio D’Anca; Michela Todaro; Elena Puccio; Luisa Sciortino; Filippo Ambrosino; Riccardo Campana; Tianxiang Chen; Yong Chen; Yuri Evangelista; Marco Feroci; Na Gao; Fangjun Lu; Yupeng Xu; Levent Cibik; Michael Krumrey

doi:10.1117/12.2631556

31 August 2022 Filters design and characterization for LAD instrument onboard eXTP

Ugo Lo Cicero, Marco Barbera, Nicola Montinaro, Fabio D’Anca, Michela Todaro, Elena Puccio, Luisa Sciortino, Filippo Ambrosino, Riccardo Campana, Tianxiang Chen, Yong Chen, Yuri Evangelista, Marco Feroci, Na Gao, Fangjun Lu, Yupeng Xu, Levent Cibik, Michael Krumrey

Author Affiliations +

Proceedings Volume 12181, Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray; 121816H (2022) https://doi.org/10.1117/12.2631556
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

The LAD (large area detector) instrument, onboard the Sino-European mission eXTP (enhanced x-ray timing and polarimetry), will perform single-photon, high-resolution timing and energy measurements, in the energy range 2 to 30 keV, with a large collecting area. Its silicon drift detectors need shielding from NIR/Vis/UV light by astrophysical sources and the bright Earth, to avoid performance degradation. Filters made of an Al coated thin polyimide (PI) membrane will guarantee the needed out-of-band rejection while offering high x-ray transparency. They will be placed between the detectors and the capillary plate plate collimators, open to the external environment. The mission is now in phase B2 and a baseline design for the filters was produced. We describe the filter design and modeling activity, and report the characterization performed so far on x-ray transmission, pinhole and defects, thermo-vacuum cycling endurance, and bright Earth optical load shielding properties.

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Ugo Lo Cicero, Marco Barbera, Nicola Montinaro, Fabio D’Anca, Michela Todaro, Elena Puccio, Luisa Sciortino, Filippo Ambrosino, Riccardo Campana, Tianxiang Chen, Yong Chen, Yuri Evangelista, Marco Feroci, Na Gao, Fangjun Lu, Yupeng Xu, Levent Cibik, and Michael Krumrey "Filters design and characterization for LAD instrument onboard eXTP", Proc. SPIE 12181, Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray, 121816H (31 August 2022); https://doi.org/10.1117/12.2631556

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