Intense, Directed Neutron Beams From A Laser-Driven Neutron Source At Phelix
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Laser-driven neutrons are generated by the conversion of laser-accelerated ions via<br> nuclear reactions inside a converter material. We present results from an experimental<br> campaign at the PHELIX laser at GSI in Darmstadt where protons and deuterons<br> were accelerated from thin deuterated plastic foils with thicknesses in the m and sub-<br> m range. The neutrons were generated inside a sandwich-type beryllium converter,<br> leading to reproducible neutron numbers around 10<sup>11</sup> neutrons per shot. The angular<br> distribution was measured with a high level of detail using up to 30 bubble detectors<br> simultaneously. It shows a laser forward directed component of up to 1.42 x 10<sup>10</sup><br> neutrons per steradian, corresponding to a dose of 43 mrem scaled to a distance of<br> 1m from the converter.
