Design and performance of large-pixel-size high-fill-fraction TES arrays for future X-ray astrophysics missions

E. Figueroa-Feliciano, S. R. Bandler, J. Chervenak, F. Finkbeiner, Naoko Iyomoto, R. L. Kelley, C. A. Kilbourne, F. S. Porter, T. Saab, J. Sadleir, J. White

Research output: Contribution to journalArticle

Abstract

We have designed, modeled, fabricated and tested a 600 μ m high-fill-fraction microcalorimeter array that will be a good match to the requirements of future X-ray missions. Our devices use transition-edge sensors coupled to overhanging bismuth/copper absorbers to produce arrays with 97% or higher fill fraction. An extensive modeling effort was undertaken in order to accommodate large pixel sizes (500- 1000 μ m) and maintain the best energy resolution possible. The finite thermalization time of the large absorber and the associated position dependence of the pulse shape on absorption position constrain the time constants of the system given a desired energy-resolution performance. We show the results of our analysis and our new pixel design, consisting of a novel TES-on-the-side architecture which creates a controllable TES-absorber conductance.

Original languageEnglish
Pages (from-to)528-530
Number of pages3
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume559
Issue number2
DOIs
Publication statusPublished - Apr 14 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

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