Development of TiAu TES x-ray calorimeters for the X-IFU on ATHENA space observatory

Conference paper (2018)

Authors

Pourya Khosropanah SRON–Netherlands Institute for Space Research
E. Taralli SRON–Netherlands Institute for Space Research
L Gottardi SRON–Netherlands Institute for Space Research
C. P. de Vries SRON–Netherlands Institute for Space Research
K. Nagayoshi SRON–Netherlands Institute for Space Research
M.L. Ridder SRON–Netherlands Institute for Space Research
H. Akamatsu SRON–Netherlands Institute for Space Research
M. P. Bruijn SRON–Netherlands Institute for Space Research
J.R. Gao SRON–Netherlands Institute for Space Research, QN/Gao Lab
Research Group
QN/Gao Lab
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Published Date

2018

Language

English

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Research Group

QN/Gao Lab

Abstract

SRON is developing X-ray transition edge sensor (TES) calorimeters arrays, as a backup technology for X-IFU instrument on the ATHENA space observatory. These detectors are based on a superconducting TiAu bilayer TES with critical temperature of 100 mK on a 1 μm thick SiN membrane with Au or Au/Bi absorbers. Number of devices have been fabricated and measured using a Frequency Division Multiplexing (FDM) readout system with 1-5 MHz bias frequencies. We measured IV curves, critical temperature, thermal conductance, noise and also X-ray energy resolution at number of selected bias points. So far our best calorimeter shows 3.9 eV X-ray resolution at 6 keV. Here we present a summary of our results and the latest status of development of X-ray calorimeters at SRON.

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