  The paper discusses some 3D simulations to compute the ionizing radiation
dose during laser-plasma experiments leading to the generation of accelerated
protons and electrons. Also, we suggest a new method to increase the
measurement resolution of the proton energy spectrum. Monte-Carlo simulations
of the radiation doses map around the laser-foil interaction point are
performed using Geant4 General Particle Source code and the particular geometry
chosen for the experimental setup. We obtain the map of the radiation dose
distribution for high-power laser - thin solid target experiments, considering
a cubic geometry of the interaction chamber. The computed radiation dose
distribution shows a good agreement with various, previously obtained
experimental results, and could be a step towards simulating the radiation
environment inside of a spacecraft. To characterize the laser-plasma
accelerated protons, we introduce a new method to enhance the measurement
resolution of the proton energy spectrum by employing a stack of thin solid
detectors, preferably CR-39. Each detector is thinner than the Bragg peak
region on the Bragg curve that characterizes the loss of kinetic energy as a
function of the particle penetration depth in the detector material. The
relevance of this method for space radiation characterization and cybersecurity
insurance is highlighted.
