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Proceedings Paper

Temperature effects on the performances of the ATHENA X-IFU thermal filters
Author(s): Marco Barbera; Ugo Lo Cicero; Luisa Sciortino; Elena Magnano; Igor Píš; Angela Ciaravella; Alfonso Collura; Antonio Jimenez Escobar; Matteo Levantino; Flavio Nuzzo
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Paper 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.

Paper Details

Date Published: 18 July 2016
PDF: 11 pages
Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 990560 (18 July 2016); doi: 10.1117/12.2232323
Show Author Affiliations
Marco Barbera, Univ. degli Studi di Palermo (Italy)
Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Palermo (Italy)
Ugo Lo Cicero, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Palermo (Italy)
Univ. degli Studi di Palermo (Italy)
Luisa Sciortino, Univ. degli Studi di Palermo (Italy)
Elena Magnano, Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali (Italy)
Univ. of Johannesburg (South Africa)
Igor Píš, Elettra-Sincrotrone Trieste S.C.p.A. (Italy)
Angela Ciaravella, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Palermo (Italy)
Alfonso Collura, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Palermo (Italy)
Antonio Jimenez Escobar, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Palermo (Italy)
Matteo Levantino, Univ. degli Studi di Palermo (Italy)
Flavio Nuzzo, Univ. degli Studi di Palermo (Italy)


Published in SPIE Proceedings Vol. 9905:
Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray
Jan-Willem A. den Herder; Tadayuki Takahashi; Marshall Bautz, Editor(s)

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