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Free keywords:
Protons; Copper; Zinc; Nuclear reactions; Calibration
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.
