Fast timing with XEUS: evaluation of different detector concepts

Eckhard Kendziorra; Michael Martin; Andrea Santangelo; Jörn Wilms; Didier Barret; Gerry Skinner; Lothar Strüder; Peter Lechner; Johannes Treis

doi:10.1117/12.671951

13 June 2006 Fast timing with XEUS: evaluation of different detector concepts

Eckhard Kendziorra, Michael Martin, Andrea Santangelo, Jörn Wilms, Didier Barret, Gerry Skinner, Lothar Strüder, Peter Lechner, Johannes Treis

Author Affiliations +

Proceedings Volume 6266, Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray; 62661Y (2006) https://doi.org/10.1117/12.671951
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

With its large collecting area XEUS will be ideally suited to probe strong gravity fields around collapsed objects and to constrain the equation of state of dense matter in neutron stars. For these studies, detectors are needed which can measure 10⁶ events/sec with high time resolution (10 μsec) and good energy resolution (ΔE = 200 - 300 eV FWHM) combined with an energy and flux independent dead time. The current baseline for a dedicated fast timing detector on XEUS is an array of 19 silicon drift detectors (SDD) operated as single photon detectors. Optionally we have studied an array of 40 x 20 SDD/DEPFET macro pixel detectors read out at a constant frame rate of 10⁵/sec. Alternatively to these two dedicated detectors, a high time resolution mode of the Wide Field Imager (1024 x 1024 DEPFET array with 78μm x 78μm pixels) is considered here. We have simulated the expected timing performance of these detector options based on results from laboratory measurements. We have performed Monte Carlo simulations using the latest available XEUS mirror response files for Crab like sources and intensities ranging from 10² up to 4x10⁶ events/sec. Our results are discussed in the light of the scientific requirements for fast timing as expressed in the ESA Cosmic Vision 2015-2025 plan.

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Eckhard Kendziorra, Michael Martin, Andrea Santangelo, Jörn Wilms, Didier Barret, Gerry Skinner, Lothar Strüder, Peter Lechner, and Johannes Treis "Fast timing with XEUS: evaluation of different detector concepts", Proc. SPIE 6266, Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray, 62661Y (13 June 2006); https://doi.org/10.1117/12.671951

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KEYWORDS

Sensors

Field effect transistors

Mirrors

Monte Carlo methods

Photons

Point spread functions

Spectroscopy

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