Speaker
Description
See the full abstract here:
http://ocs.ciemat.es/EPS2019ABS/pdf/P2.2006.pdf
Laser-driven neutron sources have recently attracted significant attention due to their potential uses in science, industry, healthcare, and security. In laser-matter interaction experiments, neutrons can be efficiently produced by nuclear reactions involving the laser-driven light ions [1]. Characterisation of these sources is important for their further development, as well as to investigate the properties of their parent ions. Neutrons from a laser driven source are typically characterised using diagnostics such as bubble detectors, nuclear activation and ToF detectors [2,3]. The fast (MeV) neutrons produced by the source are scattered by every object in the target area, bouncing around for a long time until they are sufficiently slowed down. Characterisation of the neutron source therefore poses a significant challenge, especially for the time-integrated dosimeters. The performance of bubble detector dosimeters was therefore studied in a recent experiment at the Vulcan petawatt laser of the CLF, STFC, UK, by deploying the dosimeter simultaneously with bubble detector spectrometers and ToF scintillator detectors. The results from a large number of shots were compared to evaluate the performance of the dosimeters; the experimental and simulation results to this end will be presented.
[1] S. Kar et al, 2016, Beamed neutron emission driven by laser accelerated light ions, New Journal of Physics
[2] D. Jung et al, 2013, Characterization of a novel, short pulse laser-driven neutron source, Physics of Plasmas
[3] S. R. Mirfayzi et al, 2015, Calibration of time of flight detectors using laser-driven neutron source, Review of Scientific Instruments
