Studies of thermal diffusion in planar absorber designs for the micro-X rocket

Enectali Figueroa-Feliciano, T. Saab, P. M. Rivera-Ortiz, S. R. Bandler, N. Iyomoto, R. L. Kelley, C. A. Kilbourne, F. S. Porter, S. J. Smith

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We have studied a potential design for a transition-edge sensor (TES) microcalorimeter array for the Micro-X High Resolution Microcalorimeter X-ray Imaging Rocket. Diffusion simulations of a design that places a small TES in the center of the pixel with a large in-plane absorber around the TES demonstrate that with high-quality gold films (RRR >6) 2 eV resolution is attainable in a 700 μm pixel, meeting the Micro-X requirement. X-ray hits directly on the TES, however, create a non-gaussian high energy tail to the device response. This high energy tail contains 5% of incident photons and cannot be removed by lowering the optimal filter bandwidth.

Original languageEnglish
Pages (from-to)424-429
Number of pages6
JournalJournal of Low Temperature Physics
Issue number1-2 PART 1
Publication statusPublished - Apr 1 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics


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