量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum and Radiological Science and Technology.
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Exposures were made with Medipix2 TimePix-based Si detectors at the HIMAC facility in Japan to explore the potential for discrimination between tracks with differing charges and energies,but with very similar dE/dx values. Data were taken at 151 increments for a number of different beams including 600 and 800MeV/ASi,180MeV/A Ne and 100MeV/AO. Data were also obtained for 400MeV/A Si and 500 MeV/A Fe along with 290 and 180MeV/A N. The TimePix chips have been calibrated to achieve the maximum resolution. Estimates for the angularr esolution for these types of tracks are also possible from these data,which are essential in the development of a TimePix-based dosimetric device for use in a space radiation environment. One of the principal objectives of these data runs was to explore the resolution of TimePix-based Si detectors to discriminate between various ions with different energies and charges, but with similar dE/dx values in Si. Analysis of the images obtained shows the clear differences in the d-ray halos for particles with similar dE/dx values but for differing charges and energies. These measurements are part of an ongoing program to explore the range of capabilities ofthe TimePix-based detector with respect to dosimetry uses in space.
雑誌名
Nuclear Instruments & Methods in Physics Research Section A
Penetrating heavy ion charge and velocity discrimination with a Time Pix-based Si detector(for space radiation applications)
