Position-sensitive microcalorimeters for large-field, high-energy-resolution astrophysics

Enectali Figueroa-Feliciano*, Kevin Boyce, Jay Chervenak, Fred Finkbeiner, Rich Kelley, Mary Li, Mark Lindeman, Scott Porter, Caroline K. Stahle

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


We are developing a distributed-readout imaging spectrometer named Position-Sensitive Transition-Edge Sensor (PoST). A PoST is a microcalorimeter capable of one-dimensional imaging spectroscopy. It consists of two Transition-Edge Sensors (TESs) at each end of a long x-ray absorber. The position of an x-ray absorption event in the PoST is determined from the rise time and relative signal sizes in the two sensors. The energy of the absorbed photon is inferred from the sum of the two pulses. We discuss the modeling, operation, and readout of PoSTs and their application to the Constellation-X mission.

Original languageEnglish (US)
Pages (from-to)913-921
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Issue number2
StatePublished - 2002
EventX-Ray and Gamma-Ray Telescopes and Instruments for Astronomy - Waikoloa, HI, United States
Duration: Aug 24 2002Aug 28 2002


  • Calorimeter
  • Constellation-X
  • Distributed read-out
  • Imaging
  • Microcalorimeter
  • Position-sensitive
  • Spectrometer
  • X-ray

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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