9 research outputs found
Development of a Si/CdTe semiconductor Compton telescope
We are developing a Compton telescope based on high resolution Si and CdTe
imaging devices in order to obtain a high sensitivity astrophysical observation
in sub-MeV gamma-ray region. In this paper, recent results from the prototype
Si/CdTe semiconductor Compton telescope are reported. The Compton telescope
consists of a double-sided Si strip detector (DSSD) and CdTe pixel detectors,
combined with low noise analog LSI, VA32TA. With this detector, we obtained
Compton reconstructed images and spectra from line gamma-rays ranging from 81
keV up to 356 keV. The energy resolution is 3.8 keV and 7.9 keV at 122 keV and
356 keV, respectively, and the angular resolution is 9.9 degrees and 5.7
degrees at 122 keV and 356 keV, respectively.Comment: 12 pages, 14 figures, submitted to SPIE conference proceedings vol.
5501, "High-Energy Detectors in Astronomy", Glasgow UK, 6/21-6/24 200
Results of a Si/CdTe Compton Telescope
We have been developing a semiconductor Compton telescope to explore the
universe in the energy band from several tens of keV to a few MeV. We use a Si
strip and CdTe pixel detector for the Compton telescope to cover an energy
range from 60 keV. For energies above several hundred keV, the higher
efficiency of CdTe semiconductor in comparison with Si is expected to play an
important role as an absorber and a scatterer. In order to demonstrate the
spectral and imaging capability of a CdTe-based Compton Telescope, we have
developed a Compton telescope consisting of a stack of CdTe pixel detectors as
a small scale prototype. With this prototype, we succeeded in reconstructing
images and spectra by solving the Compton equation from 122 keV to 662 keV. The
energy resolution (FWHM) of reconstructed spectra is 7.3 keV at 511 keV and 3.1
keV at 122 keV, respectively. The angular resolution obtained at 511 keV is
measured to be 12.2 degree (FWHM).Comment: 11 pages, 13 figures, presented at SPIE conference HARD X-RAY AND
GAMMA-RAY DETECTOR PHYSICS VII", San Diego, 2005. To be published in Proc.
SPIE 200
Development of an amorphous selenium-based photodetector driven by a diamond cold cathode
10.3390/s131013744Sensors (Switzerland)131013744-1377