Patent ID: 8610080

Claim:
Method for determining the spectral and spatial distribution, along at least one axis, of a braking photon flow which results from the interaction of pulses of electrons on a braking target, characterized in that said method comprises the following steps: placing each conversion target of a succession of conversion targets, one after the other, on a measurement unit which faces the braking photon flow and, for each conversion target of said succession of conversion targets, moving said measurement unit along said axis so that said each conversion target is placed successively at different points of said axis and, for each point of said axis, carrying out a neutron measurement complying with a neutron measurement carried out at a first point of the axis, the neutron measurement resulting from an integration of neutron detection and counting signals, each neutron detection and counting signal resulting from the impact of said braking photons (ph) on said each conversion target, said each conversion target being sensitive to photons of energy substantially greater than a first energy threshold, the neutrons that participate in the formation of a detection and counting signal being detected and counted over a time range between two successive pulses of electrons.