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Proceedings Paper

Hyper-velocity impact test and simulation of a double-wall shield concept for the Wide Field Monitor aboard LOFT
Author(s): E. Perinati; M. Rott; A. Santangelo; S. Suchy; C. Tenzer; E. Del Monte; J.-W. den Herder; S. Diebold; M. Feroci; A. Rachevski; A. Vacchi; G. Zampa; N. Zampa
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Paper Abstract

The space mission LOFT (Large Observatory For X-ray Timing) was selected in 2011 by ESA as one of the candidates for the M3 launch opportunity. LOFT is equipped with two instruments, the Large Area Detector (LAD) and the Wide Field Monitor (WFM), based on Silicon Drift Detectors (SDDs). In orbit, they would be exposed to hyper-velocity impacts by environmental dust particles, which might alter the surface properties of the SDDs. In order to assess the risk posed by these events, we performed simulations in ESABASE2 and laboratory tests. Tests on SDD prototypes aimed at verifying to what extent the structural damages produced by impacts affect the SDD functionality have been performed at the Van de Graaff dust accelerator at the Max Planck Institute for Nuclear Physics (MPIK) in Heidelberg. For the WFM, where we expect a rate of risky impacts notably higher than for the LAD, we designed, simulated and successfully tested at the plasma accelerator at the Technical University in Munich (TUM) a double-wall shielding configuration based on thin foils of Kapton and Polypropylene. In this paper we summarize all the assessment, focussing on the experimental test campaign at TUM.

Paper Details

Date Published: 24 July 2014
PDF: 18 pages
Proc. SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 914465 (24 July 2014); doi: 10.1117/12.2054943
Show Author Affiliations
E. Perinati, Institut für Astronomie und Astrophysik Tübingen, Eberhard Karls Univ. Tübingen (Germany)
M. Rott, Technische Univ. München (Germany)
A. Santangelo, Institut für Astronomie und Astrophysik Tübingen, Eberhard Karls Univ. Tübingen (Germany)
S. Suchy, Institut für Astronomie und Astrophysik Tübingen, Eberhard Karls Univ. Tübingen (Germany)
C. Tenzer, Institut für Astronomie und Astrophysik Tübingen, Eberhard Karls Univ. Tübingen (Germany)
E. Del Monte, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
J.-W. den Herder, SRON Netherlands Institute for Space Research (Netherlands)
S. Diebold, Institut für Astronomie und Astrophysik Tübingen, Eberhard Karls Univ. Tübingen (Germany)
M. Feroci, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
A. Rachevski, INFN (Italy)
A. Vacchi, INFN (Italy)
G. Zampa, INFN (Italy)
N. Zampa, INFN (Italy)


Published in SPIE Proceedings Vol. 9144:
Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray
Tadayuki Takahashi; Jan-Willem A. den Herder; Mark Bautz, Editor(s)

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