Large-area CdTe diode detector for space application

K. Nakazawa*, T. Takahashi, S. Watanabe, G. Sato, M. Kouda, Y. Okada, T. Mitani, Y. Kobayashi, Y. Kuroda, M. Onishi, R. Ohno, H. Kitajima

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


The current status of Schottky CdTe diode detectors, especially in view of their space application for hard X-ray and gamma-ray astronomy, are reported. For practical use in space science, a large-area CdTe diode with a size of 21.5 × 21.5 mm2 and a thickness of 0.5 mm was developed. A good energy resolution, 2.8 keV (FWHM) at -20°C, and high homogeneity to within 0.2% over the detector were achieved for the spectral performance. This device has successfully passed a series of tests required for its use in space, in view of utilizing Japanese M-V rockets. The tests include the mechanical environment test, vacuum test, long run for weeks and proton-beam radiation. Initial results from a 2 × 2 segmented electrode large-area device with a guard-ring are also presented.

Original languageEnglish
Pages (from-to)412-418
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1-2
Publication statusPublished - 2003 Oct 11

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics


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