Objective
The measurement of electron-positron pairs in heavy-ion collisions provides the unique opportunity to study the in-medium properties of vector mesons which is a fundamental issue in modern nuclear, hadron and particle physics. The lepton pair is a "penetrating probe" because it delivers undistorted information on the conditions inside the dense fireball. The Compressed Baryonic Matter (CBM) experiment at the future accelerator facility in Darmstadt will be equipped with a Transition Radiation and Tracking detector for electron identification, pion suppression and charged particle tracking.
The challenges in this experiment are the reaction rates of up to 10 MHz and charged particle multiplicities of up to 1000. State-of-the-art X-ray detectors are too slow to be used in these measurements. The goal of this project is to develop the components of a Transition Radiation Tracking detector. The project includes the design and construction of the straw tubes for X-ray detection and the X-ray generating radiator material. The very fast detector response at extremely high reaction rates and particle multiplicities requires the development of fast low-noise read-out electronics. Another important task should be the test of the detector prototype components with charged particle beams. Fast large-area position-sensitive X-ray detectors have a wide field of applications such as X-ray imaging for solid state and biological research.
The application of such detectors to check large size samples in traffic etc may be also possible. The participating teams are well experienced in performing detector and electronic design and construction. The collaboration has access to the necessary technical infrastructure resources in NIS and INTAS member states. Accelerators will be available in the home institutes of most teams. This project is an important contribution to the realization of an experimental research program in future heavy-ion physics.
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DRESDEN
Germany