Performance of compact TES arrays with integrated high-fill-fraction X-ray absorbers

Mark A. Lindeman*, Simon Bandler, Regis P. Brekosky, James A. Chervenak, Enectali Figueroa-Feliciano, Fred M. Finkbeiner, Richard L. Kelley, Tarek Saab, Caroline K. Stahle, D. J. Talley

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We have recently produced and tested two-dimensional arrays of Mo/Au transition-edge-sensor (TES) calorimeters with Bi/Cu absorbers. The arrays represent a significant step towards meeting the specifications of NASA's Constellation-X mission. The calorimeters are compactly spaced within 5×5 arrays of 250μm square pixels necessary for an angular resolution of 5arcsec. Lithographically produced absorbers hang over the substrate and wiring between the TESs for high filling fraction and high quantum efficiency. We designed the calorimeters with heat capacities and thermal couplings such that X-rays produce pulses with fall times of approximately 300μs to allow relatively high count rates with low dead time. We read out up to four of the pixels simultaneously. The arrays demonstrated very good energy resolution (5eV at 1.5keV and 7eV at 6keV) and little crosstalk between neighboring pixels. Publised by Elsevier B.V.

Original languageEnglish (US)
Pages (from-to)411-413
Number of pages3
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume520
Issue number1-3
DOIs
StatePublished - Mar 11 2004

Keywords

  • Bismuth
  • Calorimeter
  • Compact array
  • Mushroom absorber
  • Transition edge sensor

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

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