Ultra-intense gamma and neutron beams are indispensable tools in many research fields like nuclear, atomic and material science as well as in biophysical and medical applications. Especially for astrophysical applications such as the laboratory investigations of the rapid multi neutron capture process (r-process) responsible for the production of heavy elements in explosive scenarios, neutron fluxes in excess of $10^{21}$ n/(cm$^2$ s) are required. Such ultra-high fluxes are unattainable with existing conventional reactor or accelerator-based facilities. Nowadays, concepts are discussed to generate a high-flux of neutron beams which are based on ultra-high power multi-petawatt lasers operating at >$10^{23}$ W/cm$^2$ intensities.
Laser-driven relativistic electron beams are excellent tools for the generation of MeV gamma beams and secondary particles like neutrons.
In the presentation it is reported on enhanced laser-driven electron beam generation in the multi-MeV energy range that promises a tremendous increase of applicability. Here, it is presented a novel concept for the efficient generation of gamma and neutron beams based on relativistic laser interactions with a long-scale near critical density plasma at moderate relativistic laser intensities. New experimental insights in laser-driven generation of ultra-intense well-directed multi-MeV beams of photons with fluences of >$10^{12}$ ph/sr and an ultra-high intense neutron source with >$10^{10}$ neutrons per shot are presented. Optimization processes promises an ultra-high neutron fluence of >$10^{11}$ n/cm$^2$ and corresponding neutron peak-fluxes of ~$10^{22}$ n/(cm$^2$ s) already at moderate relativistic laser intensities.
Zoom-Meeting
https://gsi-fair.zoom.us/j/96629963798
Meeting-ID: 966 2996 3798
Kenncode: 130302
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