In recent years, an extremely promising application of the 3D Si technology to tissue equivalent detectors has been proposed. The developments, initiated by the Centre for Medical Radiation Physics (CMRP) of Wollongong, Australia (US patent No. 8421022 B2), aim at replacing the traditional TEPC low-pressure gas systems with structures comparable in size to human cells, employing tissue-equivalent material (PMMA, polyimide…), allowing to calculate micro-dosimetry quantities and extract the Relative Biological Effectiveness (RBE) of mixed radiation fields. This technology is in its early stages and requires additional developments.
A contract for the execution of the activity has been awarded by ESA to SINTEF (NO). SINTEF’s objectives, in collaboration with CMRP, are to:
- Design a tissue-equivalent sensor, with high radiation tolerance, based on 3D Si fabrication technology, capable of low-power, real-time measurement of the mixed radiation field (including neutrons) at cellular scale, mimicking the interaction between radiation and human tissue materials.
- Develop the underlying 3D Si technology for tissue equivalent sensors and sensor fabrication
- Design and manufacture a prototype instrument based on the developed 3D Si tissue equivalent sensors and off-the-shelf electronics
- Characterise the prototype instrument