Development of a CdTe pixel detector with a window comparator ASIC for high energy X-ray applications

T. Hirono, H. Toyokawa, Y. Furukawa, T. Honma, H. Ikeda, M. Kawase, T. Koganezawa, T. Ohata, M. Sato, G. Sato, M. Takagaki, T. Takahashi, S. Watanabe

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Abstract

We have developed a photon-counting-type CdTe pixel detector (SP8-01). SP8-01 was designed as a prototype of a high-energy X-ray imaging detector for experiments using synchrotron radiation. SP8-01 has a CdTe sensor of 500μm thickness, which has an absorption efficiency of almost 100% up to 50 keV and 45% even at 100 keV. A full-custom application specific integrated circuit (ASIC) was designed as a readout circuit of SP8-01, which is equipped with a window-type discriminator. The upper discriminator realizes a low-background measurement, because X-ray beams from the monochromator contain higher-order components beside the fundamental X-rays in general. ASIC chips were fabricated with a TSMC 0.25μm CMOS process, and CdTe sensors were bump-bonded to the ASIC chips by a gold-stud bonding technique. Beam tests were performed at SPring-8. SP8-01 detected X-rays up to 120 keV. The capability of SP8-01 as an imaging detector for high-energy X-ray synchrotron radiation was evaluated with its performance characteristics.

Original languageEnglish
Pages (from-to)88-91
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume650
Issue number1
DOIs
Publication statusPublished - 2011 Sep 11

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Keywords

  • CdTe
  • Photon counting
  • Pixel detector
  • Readout ASIC
  • X-ray imaging

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

Hirono, T., Toyokawa, H., Furukawa, Y., Honma, T., Ikeda, H., Kawase, M., Koganezawa, T., Ohata, T., Sato, M., Sato, G., Takagaki, M., Takahashi, T., & Watanabe, S. (2011). Development of a CdTe pixel detector with a window comparator ASIC for high energy X-ray applications. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 650(1), 88-91. https://doi.org/10.1016/j.nima.2010.12.207