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Three-dimensional photograph of electron tracks through a plastic scintillator

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Iskhakov,  Timur
Optical Technologies, Technology Development and Service Units, Max Planck Institute for the Science of Light, Max Planck Society;
Quantum Radiation, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201115

Leuchs,  Gerd
Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Filipenko, M., Iskhakov, T., Hufschmidt, P., Anton, G., Campbell, M., Gleixner, T., et al. (2014). Three-dimensional photograph of electron tracks through a plastic scintillator. EUROPEAN PHYSICAL JOURNAL C, 74(11): 3131. doi:10.1140/epjc/s10052-014-3131-9.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002D-647E-B
Abstract
The reconstruction of particle trajectories makes it possible to distinguish between different types of charged particles. In high-energy physics, where trajectories are rather long (several meters), large size trackers must be used to achieve sufficient position resolution. However, in low-background experiments like the search for neutrinoless double beta decay, tracks are rather short (some mm to several cm, depending on the detector in use) and three-dimensional trajectories could only be resolved in gaseous time-projection chambers so far. For detectors of a large volume of around one cubic meter (large in the scope of neutrinoless double beta search) and therefore large drift distances (several decimeters to 1 m), this technique is limited by diffusion and repulsion of charge carriers. In this work we present a "proof-of-principle" experiment for a new method of the three-dimensional tracking of charged particles by scintillation light: we used a setup consisting of a scintillator, mirrors, lenses, and a novel imaging device (the hybrid photon detector) in order to image two projections of electron tracks through the scintillator. We took data at the T-22 beamline at DESY with relativistic electrons with a kinetic energy of 5GeV and from this data successfully reconstructed their three-dimensional propagation path in the scintillator. With our setup we achieved a position resolution in the range of 170-248 mu m.