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NAIS: Nuclear activation-based imaging spectroscopy

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Britz,  Alexander
International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Institut für Kernphysik, Schlossgartenstr. 9, Technische Universität Darmstadt, D-64289 Darmstadt, Germany;

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Citation

Günther, M. M., Britz, A., Clarke, R. J., Harres, K., Hoffmeister, G., Nürnberg, F., et al. (2013). NAIS: Nuclear activation-based imaging spectroscopy. Review of Scientific Instruments, 84(7): 073305. doi:10.1063/1.4815826.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-22FF-F
Abstract
In recent years, the development of high power laser systems led to focussed intensities of more than 1022 W/cm2 at high pulse energies. Furthermore, both, the advanced high power lasers and the development of sophisticated laser particle acceleration mechanisms facilitate the generation of high energetic particle beams at high fluxes. The challenge of imaging detector systems is to acquire the properties of the high flux beam spatially and spectrally resolved. The limitations of most detector systems are saturation effects. These conventional detectors are based on scintillators, semiconductors, or radiation sensitive films.We present a nuclear activation-based imaging spectroscopy method, which is called NAIS, for the characterization of laser accelerated proton beams. The offline detector system is a combination of stacked metal foils and imaging plates (IP). After the irradiation of the stacked foils they become activated by nuclear reactions, emitting gamma decay radiation. In the next step, an autoradiography of the activated foils using IPs and an analysis routine lead to a spectrally and spatially resolved beam profile. In addition, we present an absolute calibration method for IPs.