TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN
Online ISSN : 1884-0485
ISSN-L : 1884-0485
r) Space Environment and Debris
Timepix-Based Miniaturized Radiation Micro-Tracker for the Micro-Satellite RISESAT
Carlos GRANJAMichal PLATKEVICDaniel TURECEKVaclav KRAUSStanislav POSPISILJan JAKUBEKMichael HOLIKZdenek VYKYDALOndrej VALACHIvan CAICEDOToshinori KUWAHARA
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2014 Volume 12 Issue ists29 Pages Tr_7-Tr_11

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Abstract

A customized lightweight and low-power radiation micro-tracker has been constructed for the microsatellite RISESAT (Rapid International Scientific Experiment Satellite) developed by Tohoku University for scientific experiments in space. The instrument is based on hybrid semiconductor pixel detector technology developed by the Medipix Collaboration. These Timepix detectors consist of an array of 256 × 256 (= 65 k) pixels with 55 μm pitch distributed over area of 2 cm2. Each cell is connected to the corresponding pixel on the 300 μm thick siliconsensor. Each pixel integrates electronics which enables counting of the number of particles, to measure the energy deposited or to register the time of interaction of ionizing particles per-pixel. Two independent detector layers operate as a radiation micro-telescope and provide high resolution and high sensitivity tracking and directional detection of energetic charged particles (electrons, muons, pions, protons, light ions up to heavy and relativistic ions). Also X-rays and even neutrons can be detected. The pixel detectors provide noiseless detection of single radiation quanta, measure their energy, position, direction of trajectory and time of interaction. Different types of particles and interactions can be identified and distinguished thanks to the detector's high spatial granularity.

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© 2014 The Japan Society for Aeronautical and Space Sciences
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