Share Email Print
cover

Proceedings Paper • new

ATHENA: phase A study status and optics/instrument accommodation (Conference Presentation)
Author(s): Mark R. Ayre; Ivo Ferreira; Marcos Bavdaz; Eric Wille; Bas Fransen; Alexander Stefanescu

Paper Abstract

ATHENA is the 2nd ‘Large’ mission in the ESA Cosmic Vision programme, and currently in Phase A with a view to adoption in 2021. This paper presents an overview of the ATHENA mission architecture, instruments and spacecraft design, highlighting the main spacecraft-level challenges involved in realizing the mission. Firstly a consideration of the accommodation of the Silicon Pore Optics (SPO) Mirror Modules (MM) is presented, taking into account: The procedure for MM integration into the Mirror Assembly (MA) to achieve the required alignment; stiffness requirements and handling scheme required to constrain deformation under gravity during x-ray testing; temperature control to constrain thermo-elastic deformation during flight; the capability to focus using the Instrument Switching Mechanism (ISM), and strategies to minimize mechanical loading of the MMs during launch. Then the accommodation of the X-IFU and WFI instruments onto the Science Instrument Module (SIM) is presented, considering in particular: The very large thermal dissipation (~4 kW at a variety of interfaces and temperatures) necessitating a challenging thermal design for the SIM; the location of the SIM at the top of the launch stack, necessitating combination of a stiff SIM design with maximized instrument support, and mechanical-damping measures to maintain the loads seen by the instruments to feasible levels. The paper concludes with a programmatic outlook to the adoption.

Paper Details

Date Published: 9 September 2019
PDF
Proc. SPIE 11119, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX, 111190R (9 September 2019); doi: 10.1117/12.2531015
Show Author Affiliations
Mark R. Ayre, European Space Research and Technology Ctr. (Netherlands)
Ivo Ferreira, European Space Research and Technology Ctr. (Netherlands)
Marcos Bavdaz, European Space Research and Technology Ctr. (Netherlands)
Eric Wille, European Space Research and Technology Ctr. (Netherlands)
Bas Fransen, European Space Research and Technology Ctr. (Netherlands)
Alexander Stefanescu, European Space Research and Technology Ctr. (Netherlands)


Published in SPIE Proceedings Vol. 11119:
Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX
Stephen L. O'Dell; Giovanni Pareschi, Editor(s)

© SPIE. Terms of Use
Back to Top