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Proceedings Paper

High-resolution CdTe detectors for the next-generation multi-Compton gamma-ray telescope
Author(s): Tadayuki Takahashi; Kazuhiro Nakazawa; Tuneyoshi Kamae; Hiroyasu Tajima; Yasushi Fukazawa; Masaharu Nomachi; Motohide Kokubun
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Paper Abstract

A multi-Compton gamma-ray telescope based on high resolution semiconductor materials (Semiconductor Multi-Compton Telescope (SMCT) or Advanced Compton Telescope (ACT)) is a promising approach to achieve high sensitivity for gamma-rays with energies from several hundred keV up to several MeV. A SMCT utilizing several tens of layers of thin CdTe (Cadmium Telluride) detector is an attractive concept to obtain higher detection efficiency in comparison with Si-based SMCT. Recently we have developed high energy-resolution CdTe diode detectors. A large-area detector with dimensions of 2.15 × 2.15 cm2 with a thickness of 0.5mm shows an energy resolution of better than 3 keV (FWHM) at 60 keV. In order to extend the application of CdTe diodes to the detection of MeV gamma-rays, we have constructed a stacked detector consisting of 40 layers of large CdTe diodes. Here we report the recent progress on the high-resolution CdTe diode and describe the conceptual design of new Multi-Compton Gamma-ray telescopes based on Monte Carlo simulation. An idea of active pair production telescope is briefly described.

Paper Details

Date Published: 11 March 2003
PDF: 8 pages
Proc. SPIE 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, (11 March 2003); doi: 10.1117/12.461287
Show Author Affiliations
Tadayuki Takahashi, Institute of Space and Astronautical Science (Japan)
Univ. of Tokyo (Japan)
Kazuhiro Nakazawa, Institute of Space and Astronautical Science (Japan)
Tuneyoshi Kamae, Stanford Linear Accelerator Ctr. (United States)
Hiroyasu Tajima, Stanford Linear Accelerator Ctr. (United States)
Yasushi Fukazawa, Hiroshima Univ. (Japan)
Masaharu Nomachi, Osaka Univ. (Japan)
Motohide Kokubun, Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 4851:
X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy
Joachim E. Truemper; Harvey D. Tananbaum, Editor(s)

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