Progress in the optimal TES pixel design for the X-IFU Frequency Division Multiplexing read-out

25 Jul 2019, 17:45
1h 15m
Piazza Città di Lombardia (Milano)

Piazza Città di Lombardia

Milano

Piazza Città di Lombardia, 1, 20124 Milano MI
Poster Low Temperature Detector Development and Physics Poster session

Speaker

Luciano Gottardi (SRON - Netherlands Institute for Space Research)

Description

Frequency-Division Multiplexing (FDM) is the baseline readout system for the large array of superconducting Transition-Edge Sensors (TES's) under development for the ESA X-IFU instrument on the future Athena X-ray telescope.
Excellent single pixel performance has been demonstrated already with MHz biased MoAu NASA-Goddard TESs and energy resolution below 2eV @ 6keV is routinely observed, in single pixel mode, with the FDM read-out developed at SRON/VTT.
Non-uniformity in the superconducting transition, due to the Josephson effects in a MHz-driven TES, has been observed and is potentially affecting the performance of a large array readout with a large multiplexing factor.
We are currently testing, under ac bias, several detector arrays fabricated at NASA-Goddard using MoAu-based TESs and at SRON using TiAu bilayers.
In this paper, we will present the results of an extensive experimental characterization of many pixels with various design and electro-thermal properties.

Student (Ph.D., M.Sc. or B.Sc.) N
Less than 5 years of experience since completion of Ph.D N

Primary author

Luciano Gottardi (SRON - Netherlands Institute for Space Research)

Co-authors

Stephen Smith (NASA GSFC / UMBC) Kazuhiro Sakai (NASA/GSFC) Dr Nicholas, A. Wakeham (NASA-GSFC / UMBC) Hiroki Akamatsu (Netherlands Institute for Space Research) Mr Kenichiro Nagayoshi (SRON Netherlands Institute for Space Research) Mr Marcel Ridder (SRON Netherlands Institute for Space Research) Dr Emanuele Taralli (SRON) Jan van der Kuur (Netherlands Institute for Space Research) Mr Kevin Ravensberg (SRON Netherlands Institute for Space Research) Mr Thomas Weststrate (SRON Netherlands Institute for Space Research) Dr Simon, R. Bandler (NASA-GSFC) Dr Marcel Bruijn (SRON - Netherlands Institute for Space Research) Dr James, A. Chervenak Mr Anton van der Linden (SRON - Netherlands Institute for Space Research) Dr Pourya Khosropanah (SRON - Netherlands Institute for Space Research) Dr Jian-Rong Gao (SRON - Netherlands Institute for Space Research) Brian Jackson (Netherlands Institute for Space Research)

Presentation Materials