Thermal modelling of the ATHENA X-IFU filters

Antonino Buttacavoli, Luisa Sciortino, Ugo Lo Cicero, Salvatore Ferruggia Bonura, Elena Puccio, Marco Barbera, Fabio D'Anca, Ugo Lo Cicero, Salvatore Ferruggia Bonura, Marco Barbera, Antonino Buttacavoli, Elena Puccio, Marco Barbera, Marco Barbera

Risultato della ricerca: Other

1 Citazioni (Scopus)

Abstract

The X-IFU instrument of the ATHENA mission requires a set of thermal filters to reduce the photon shot noise onto its cryogenic detector and to protect it from molecular contamination. A set of five filters, operating at different nominal temperatures corresponding to the cryostat shield temperatures, is currently baselined. The knowledge of the actual filter temperature profiles is crucial to have a good estimation of the radiative load on the detector. Furthermore, a few filters may need to be warmed-up to remove contaminants and it is necessary to ensure that a threshold temperature is reached throughout the filters surface. For these reasons, it is fundamental to develop a thermal modeling of the full set of filters in a representative configuration. The baseline filter is a polyimide membrane 45 nm thick coated with 30 nm of highpurity aluminum, mechanically supported by a metallic honeycomb mesh. In this paper, we describe the implemented thermal modeling and report the results obtained in different studies: (i) a trade-off analysis on how to reach a minimum target temperature throughout the outer filter, (ii) a thermal analysis when varying the emissivity of the filter surfaces, and (iii) the effect of removing one of the filters.
Lingua originaleEnglish
Pagine177-
Numero di pagine10
Stato di pubblicazionePublished - 2018

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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    Buttacavoli, A., Sciortino, L., Lo Cicero, U., Ferruggia Bonura, S., Puccio, E., Barbera, M., D'Anca, F., Lo Cicero, U., Ferruggia Bonura, S., Barbera, M., Buttacavoli, A., Puccio, E., Barbera, M., & Barbera, M. (2018). Thermal modelling of the ATHENA X-IFU filters. 177-.