Objective
Gamma-ray spectroscopy has been proven to be one of the most powerful and sometimes the only possible approach for studies of various objects of the Universe. Among the primary tasks are: analysis of composition of planetary surfaces, investigation of solar flares, study of relativistic objects such as neutron stars, black holes, and active galactic nuclei. The new technology is based on detectors made of high purity germanium (HPGe) crystals. Such instruments provide energy resolution of about 0.2% at 1MeV. However, HPGe spectrometers are very sensitive to operational conditions. First, a detector would not operate if its temperature exceeds approximately 130K. Second, its energy resolution degrades when the crystal is exposed to a flux of energetic particles. The only known way of restoring its spectrometric quality is an annealing process that is in fact heating of the crystal up to 400K for a period of few days.
The proposed research naturally consists of 4 complementary parts: Detailed investigation of operation of a HPGe detector under various temperature and radiation condition. Assesment of annealing parameters in connection with thermal and radiation histories. Modelling of mission specific environments (especially those expected for low earth satellites and landers), including creation or adjustment of engineering thermal models of planets and asteroids.
Simulation and design and testing of heat pipe prototypes Simulation of the complete coolers using realistic models of heat loads. Optimization of the system parameters important for particular types of missions. Identifying fundamental limits of using HPGe spectrometers defined by abilities of coolers.
INTAS project participants have accumulated extensive knowledge of physics of HPGe detectors and planetary environments. While building a HPGe spectrometer for Mars-96 mission the NIS project participants have created an integrated environment for development of passive cooler with HP technology. During the development a working flight instrument was built and tested, and deep knowledge of new technology was obtained. The unique combination of the above accomplishments allows to bring the new cooling technology from its current state-of-art level to the point where it could be routinely used by experimental teams worldwide. The solutions this project would provide will significantly reduce cost and time necessary for development of new experiments.
Fields of science (EuroSciVoc)
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding Scheme
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Coordinator
31028 Toulouse Cedex
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.