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Greenbelt, MD, United States

Akamatsu H.,SRON Netherlands Institute for Space Research | Gottardi L.,SRON Netherlands Institute for Space Research | de Vries C.P.,SRON Netherlands Institute for Space Research | Adams J.S.,Greenbelt Road | And 21 more authors.
Journal of Low Temperature Physics | Year: 2016

Athena is a European X-ray observatory, scheduled for launch in (Formula presented.)2028. Athena will employ a high-resolution imaging spectrometer called X-ray integral field unit (X-IFU), consisting of an array of (Formula presented.)4000 transition edge sensor (TES) microcalorimeter pixels. For the readout of X-IFU, we are developing frequency domain multiplexing, which is the baseline readout system. In this paper, we report on the performance of a TES X-ray calorimeter array fabricated at Goddard Space Flight Center (GSFC) at MHz frequencies for the baseline of X-IFU detector. During single-pixel AC bias characterization, we measured X-ray energy resolutions (at 6 keV) of about 2.9 eV at both 2.3 and 3.7 MHz. Furthermore, in the multiplexing mode, we measured X-ray energy resolutions of about 2.9 eV at 1.3 and 1.7 MHz. © 2016 Springer Science+Business Media New York Source

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