TY - JOUR
T1 - Application of CdTe for the NeXT mission
AU - Takahashi, Tadayuki
AU - Nakazawa, Kazuhiro
AU - Watanabe, Shin
AU - Sato, Goro
AU - Mitani, Takefumi
AU - Tanaka, Takaaki
AU - Oonuki, Kousuke
AU - Tamura, Ken'Ichi
AU - Tajima, Hiroyasu
AU - Kamae, Tuneyoshi
AU - Madejski, Greg
AU - Nomachi, Masaharu
AU - Fukazawa, Yasushi
AU - Makishima, Kazuo
AU - Kokubun, Motohide
AU - Terada, Yukikatsu
AU - Kataoka, Jun
AU - Tashiro, Makoto
N1 - Funding Information:
This research was partially supported by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid in Japan (13304014, 14079207).
PY - 2005/4/1
Y1 - 2005/4/1
N2 - Cadmium telluride (CdTe) and cadmium zinc telluride (CdZnTe) have been regarded as promising semiconductor materials for hard X-ray and γ-ray detection. The high-atomic number of the materials (ZCd=48,ZTe=52) gives a high quantum efficiency in comparison with Si. The large band-gap energy (Eg=1.5eV) allows to operate the detector at room temperature. Based on recent achievements in high-resolution CdTe detectors, in the technology of ASICs and in bump-bonding, we have proposed the novel hard X-ray and γ-ray detectors for the NeXT mission in Japan. The high-energy response of the super mirror onboard NeXT will enable us to perform the first sensitive imaging observations up to 80 keV. The focal plane detector, which combines a fully depleted X-ray CCD and a pixellated CdTe detector, will provide spectra and images in the wide energy range from 0.5 to 80 keV. In the soft γ-ray band up to ∼1MeV, a narrow field-of-view Compton γ-ray telescope utilizing several tens of layers of thin Si or CdTe detector will provide precise spectra with much higher sensitivity than present instruments. The continuum sensitivity will reach several ×10-8photons-1keV-1cm-2 in the hard X-ray region and a few ×10-7photons-1keV-1cm-2 in the soft γ-ray region.
AB - Cadmium telluride (CdTe) and cadmium zinc telluride (CdZnTe) have been regarded as promising semiconductor materials for hard X-ray and γ-ray detection. The high-atomic number of the materials (ZCd=48,ZTe=52) gives a high quantum efficiency in comparison with Si. The large band-gap energy (Eg=1.5eV) allows to operate the detector at room temperature. Based on recent achievements in high-resolution CdTe detectors, in the technology of ASICs and in bump-bonding, we have proposed the novel hard X-ray and γ-ray detectors for the NeXT mission in Japan. The high-energy response of the super mirror onboard NeXT will enable us to perform the first sensitive imaging observations up to 80 keV. The focal plane detector, which combines a fully depleted X-ray CCD and a pixellated CdTe detector, will provide spectra and images in the wide energy range from 0.5 to 80 keV. In the soft γ-ray band up to ∼1MeV, a narrow field-of-view Compton γ-ray telescope utilizing several tens of layers of thin Si or CdTe detector will provide precise spectra with much higher sensitivity than present instruments. The continuum sensitivity will reach several ×10-8photons-1keV-1cm-2 in the hard X-ray region and a few ×10-7photons-1keV-1cm-2 in the soft γ-ray region.
KW - CZT
KW - CdTe
KW - Compton telescope
KW - γ-ray astronomy
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U2 - 10.1016/j.nima.2005.01.073
DO - 10.1016/j.nima.2005.01.073
M3 - Conference article
AN - SCOPUS:20144366718
SN - 0168-9002
VL - 541
SP - 332
EP - 341
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1-2
T2 - Development and Application of semiconductor Tracking Detectors
Y2 - 14 June 2004 through 17 June 2004
ER -