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P: Fachverband Plasmaphysik
P 19: Plasma Diagnostics IV
P 19.4: Vortrag
Mittwoch, 15. März 2017, 15:45–16:00, HS 1010
Development of an active bremsstrahlung detector for ultra-intense laser-plasma experiments — •Maria Molodtsova1,2, Anna Ferrari1, Alejandro Laso Garcia1, Manfred Sobiella1, Daniel Stach1, David Weinberger1,2, and Thomas Cowan1,2 — 1Helmholtz-Zentrum Dresden-Rossendorf, Germany — 2Technische Universität Dresden, Germany
Ultra-intense laser-matter interaction physics is of growing interest worldwide, because of its ability to create new extreme states of matter and to explore technologically interesting processes such as new concepts for particle acceleration, material science, and fusion energy. A critical component in laser-solid interaction is the acceleration of relativistic electrons and their transport in the material of the target, generating ultra-intense bremsstrahlung in a sub-ps time scale and with a high intensity (∼1010 photons). Usual spectrometry techniques using pulse height analysis cannot therefore be used, and new active methods need to be developed. The concept of a novel detector is presented, based on a multi layered scintillator structure, which allows the characterization of the longitudinal development of the radiation. By measuring the deposited energy in each layer the photon spectrum can be reconstructed by using an unfolding technique. Via extensive FLUKA Monte Carlo simulations, the detector was optimized to resolve the photon spectrum in the dynamic range between 50 keV and 20 MeV, and the most promising model was chosen to realize the first prototype. In this talk the optimization process, together with the construction and the first tests, are presented.