Demonstration of Athena X-IFU Compatible 40-Row Time-Division-Multiplexed Readout
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Date
2019-03-19
Type of Work
Department
Program
Citation of Original Publication
M. Durkin et al., "Demonstration of Athena X-IFU Compatible 40-Row Time-Division-Multiplexed Readout," in IEEE Transactions on Applied Superconductivity, vol. 29, no. 5, pp. 1-5, Aug. 2019, Art no. 2101005, doi: 10.1109/TASC.2019.2904472.
Rights
This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain Mark 1.0
Public Domain Mark 1.0
Subjects
Abstract
Time-division multiplexing (TDM) is the backup
readout technology for the X-ray Integral Field Unit (X-IFU),
a 3168-pixel X-ray transition-edge sensor (TES) array that will
provide imaging spectroscopy for european space agency’s Athena
satellite mission. X-IFU design studies are considering readout
with a multiplexing factor of up to 40. We present data showing
40-row TDM readout (32 TES rows + 8 repeats of the last row) of
TESs that are of the same type as those being planned for X-IFU,
using measurement and analysis parameters within the ranges
specified for X-IFU. Single-column TDM measurements have best-fit energy resolution of (1.91 ± 0.01) eV for the Al Kα complex (1.5 keV), (2.10 ± 0.02) eV for Ti Kα (4.5 keV), (2.23 ± 0.02) eV for
Mn Kα (5.9 keV), (2.40 ± 0.02) eV for Co Kα (6.9 keV), and (3.44
± 0.04) eV for Br Kα (11.9 keV). Three-column measurements have best-fit resolution of (2.03 ± 0.01) eV for Ti Kα and (2.40
± 0.01) eV for Co Kα. The degradation due to the multiplexed
readout ranges from 0.1 eV at the lower end of the energy range
to 0.5 eV at the higher end. The demonstrated performance meets
X-IFU’s energy-resolution and energy-range requirements. True
40-row TDM readout, without repeated rows, of kilopixel scale
arrays of X-IFU-like TESs is now under development.