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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 3 CONTRIBUTI IN ATTI DI CONVEGNO (Proceedings)
  4. 3.01 Contributi in Atti di convegno
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28336
Title: Simulating the optical performances of the ATHENA x-ray telescope optics
Authors: SIRONI, GIORGIA 
SPIGA, Daniele 
Della Monica Ferreira, Desiree
Ferreira, Ivo
Bavdaz, Marcos
Bergback Knudsen, Erik
Bianucci, Giovanni
Christensen, Finn Erland
Collon, Maximilien
Marioni, Fabio
PARESCHI, Giovanni 
'S Jagers, Arne
SALMASO, Bianca 
Shortt, Brian
TAGLIAFERRI, Gianpiero 
Vacanti, Giuseppe
Conconi, Paolo
Valsecchi, Giuseppe
Westergaard, Niels J.
Wille, Eric
Massahi, Sonny
Issue Date: 2018
Volume: Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray
Editors: den Herder, Jan-Willem A.; Nikzad, Shouleh; Nakazawa, Kazuhiro
Series: PROCEEDINGS OF SPIE 
Number: 10699
First Page: 106993N
Abstract: The ATHENA (Advanced Telescope for High Energy Astrophysics) X-ray observatory is an ESA-selected L2 class mission. In the proposed configuration, the optical assembly has a diameter of 2.2 m with an effective area of 1.4 m<SUP>2 </SUP>at 1 keV, 0.25 m<SUP>2</SUP> at 6 keV, and requires an angular resolution of 5 arcsec. To meet the requirements of effective area and angular resolution, the technology of Silicon Pore Optics (SPO) was selected for the optics implementation. The ATHENA's optic assembly requires hundreds of SPOs mirror modules (MMs), obtained by stacking wedged and ribbed silicon wafer plates onto silicon mandrels to form the Wolter-I configuration. Different factors can contribute to limit the imaging performances of SPOs, such as i) diffraction through the pore apertures, ii) plate deformations due to fabrication errors and surface roughness, iii) alignment errors among plates in an MM, and iv) co-focality errors within the MMs assembly. In order to determine the fabrication and assembling tolerances, the impact of these contributions needs to be assessed prior to manufacturing. A set of simulation tools responding to this need was developed in the framework of the ESA-financed projects SIMPOSIuM and ASPHEA. In this paper, we present the performance simulation obtained for the recentlyproposed ATHENA configuration in terms of effective area, and we provide a simulation of the diffractive effects in a pair of SPO MMs. Finally, we present an updated sizing of magnetic diverter (a Halbach array) and the magnetic fields levels that can be reached in order to deviate the most energetic protons out of the detector field.
Conference Name: Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray
Conference Place: Austin, Texas, United States
Conference Date: 10-15 June, 2018
URI: http://hdl.handle.net/20.500.12386/28336
URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10699/2315019/Simulating-the-optical-performances-of-the-ATHENA-x-ray-telescope/10.1117/12.2315019.short
ISSN: 0277-786X
ISBN: 9781510619517
9781510619524
DOI: 10.1117/12.2315019
Bibcode ADS: 2018SPIE10699E..3NS
Fulltext: open
Appears in Collections:3.01 Contributi in Atti di convegno

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