Filters design and characterization for LAD instrument onboard eXTP

Date Issued
2022
Author(s)
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Chen, Tianxiang
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Chen, Yong
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Gao, Na
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Lu, Fangjun
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Xu, Yupeng
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Cibik, Levent
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Krumrey, Michael
DOI
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 2–30 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.
Coverage
Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray
All editors
den Herder, Jan-Willem A.; Nikzad, Shouleh; Nakazawa, Kazuhiro
Series
Volume
12181
Start page
144
Conferenece
Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray
Conferenece place
Montréal, Québec, Canada
Conferenece date
July 17-23, 2022
Uri
Url
Issn Identifier
0277-786X
Rights
open.access
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LoCicero2022 - Filters design and characterization for LAD instrument onboard eXTP.pdf

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