Progress toward optimizing energy and arrival-time resolution with a transition-edge sensor from simulations of x-ray photon events

Paul Ripoche; Jeremy Heyl

doi:10.1117/12.2625746

29 August 2022 Progress toward optimizing energy and arrival-time resolution with a transition-edge sensor from simulations of x-ray photon events

Paul Ripoche, Jeremy Heyl

Author Affiliations +

Proceedings Volume 12191, X-Ray, Optical, and Infrared Detectors for Astronomy X; 1219109 (2022) https://doi.org/10.1117/12.2625746
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

Superconducting transition-edge sensors (TESs) carried by X-ray telescopes are powerful tools for the study of neutron stars and black holes. Several methods, such as optimal filtering or principal component analysis, have already been developed to analyse X-ray data from these sensors. However, these techniques may be hard to implement in space. Our goal is to develop a lower-computational-cost technique that optimizes energy and time resolution when X-ray photons are detected by a TES. TESs exhibit a non-linear response with photon energy. Therefore, at low energies we focus on the current-pulse height whereas at high energies we consider the current-pulse width, to retrieve energy and arrival time of X-ray photons. For energies between 0.1 keV and 30 keV and with a sampling rate of 195 kHz, we obtain an energy resolution (full width at half the maximum) between 1.32 eV and 2.98 eV. We also get an arrival-time resolution (full duration at half the maximum) between 163 ns and 3.85 ns. To improve the accuracy of these results it will be essential to get a thorough description of non-stationary noise in a TES, and to develop a robust on-board identification method of pile-up events.

Conference Presentation

Citation Download Citation

Paul Ripoche and Jeremy Heyl "Progress toward optimizing energy and arrival-time resolution with a transition-edge sensor from simulations of x-ray photon events", Proc. SPIE 12191, X-Ray, Optical, and Infrared Detectors for Astronomy X, 1219109 (29 August 2022); https://doi.org/10.1117/12.2625746

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