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Proceedings Paper

Baseline design of the filters for the LAD detector on board LOFT
Author(s): M. Barbera; B. Winter; J. Coker; M. Feroci; T. Kennedy; D. Walton; S. Zane
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Paper Abstract

The Large Observatory for X-ray Timing (LOFT) was one of the M3 missions selected for the phase A study in the ESA's Cosmic Vision program. LOFT is designed to perform high-time-resolution X-ray observations of black holes and neutron stars. The main instrument on the LOFT payload is the Large Area Detector (LAD), a collimated experiment with a nominal effective area of ~10 m2 @ 8 keV, and a spectral resolution of ~240 eV in the energy band 2-30 keV. These performances are achieved covering a large collecting area with more than 2000 large-area Silicon Drift Detectors (SDDs) each one coupled to a collimator based on lead-glass micro-channel plates. In order to reduce the thermal load onto the detectors, which are open to Sky, and to protect them from out of band radiation, optical-thermal filter will be mounted in front of the SDDs. Different options have been considered for the LAD filters for best compromise between high quantum efficiency and high mechanical robustness. We present the baseline design of the optical-thermal filters, show the nominal performances, and present preliminary test results performed during the phase A study.

Paper Details

Date Published: 24 July 2014
PDF: 11 pages
Proc. SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 914466 (24 July 2014); doi: 10.1117/12.2057408
Show Author Affiliations
M. Barbera, Univ. degli Studi di Palermo (Italy)
INAF - Osservatorio Astronomico di Palermo (Italy)
B. Winter, Mullard Space Science Lab. (United Kingdom)
J. Coker, Mullard Space Science Lab. (United Kingdom)
M. Feroci, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
INFN (Italy)
T. Kennedy, Mullard Space Science Lab. (United Kingdom)
D. Walton, Mullard Space Science Lab. (United Kingdom)
S. Zane, Mullard Space Science Lab. (United Kingdom)

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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