Temperature effects on the performances of the ATHENA X-IFU thermal filters

Date Issued
2016
Author(s)
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Magnano, Elena
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Píš, Igor
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Levantino, Matteo
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Nuzzo, Flavio
DOI
Abstract
The X-Ray Integral Field Unit (X-IFU) detector on-board ATHENA is an array of TES micro-calorimeters that will operate at 50 mK. In the current investigated design, five thermal filters (TF) will be mounted on the cryostat shields to attenuate IR radiative load and avoid energy resolution degradation due to photon shot noise. Each filter consists of a thin polyimide film ( 50 nm thick) coated with aluminum ( 30 nm thick). Since the TF operate at different temperatures in the range 0.05-300 K, it is relevant to study how temperature affects their mechanical/optical performances (e.g. near edge absorption fine structures of the atomic elements in the filter material). Such results are crucial for the proper design of the filters as well as to establish the calibration program operating temperatures. We report the preliminary results of visual inspections performed on test filters of polyimide/Al at different pressure and temperature conditions, IR transmission measurements (1-15 μm) performed in the temperature range 10- 300 K, and X-ray Absorption Spectroscopy measurements (175-1650 eV) performed in the temperature range 130-300 K.
Coverage
Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray
All editors
den Herder, Jan-Willem A.; Takahashi, Tadayuki; Bautz, Marshall
Series
Volume
9905
Start page
990560
Conferenece
Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray
Conferenece place
Edinburgh, UK
Conferenece date
26 June-1 July, 2016
Uri
Url
Issn Identifier
0277-786X
Ads BibCode
2016SPIE.9905E..60B
Rights
open.access
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Barbera2016a - Temperature effects on the performances of the ATHENA X-IFU thermal filters.pdf

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