A method for the analysis of a primary neutron beam of a neutron source sowwie beam monitor for examination of a primary neutron beam generated in a neutron source

摘要

As a jet monitors gap chambers are known, which are arranged in the primary electron beam. In the gap chambers are in the case of the neutrons cleavage processes initiated by free charge carriers generated which, in the application of electrical voltage, an ionization current pulse, by means of which the neutron is counted in the cleavage are formed as a by-product undesired fast neutrons and high-energy gamma radiation. In addition, the flux slow neutrons by means of the gas filling of the gap chambers are considerably weakened. In the new method, the new the neutron source and / or the new jet monitor these disadvantages can be avoided. Dollars a from the primary electron beam (1), by means of a scattering film (4) an incoherent neutrons from the primary electron beam (1) scattered. A part of the scattered neutrons (5) is incident on a detector means (6), the outside of the primary neutron beam (1) is arranged. The beam monitor (2) can easily be formed so that the local and in the case of pulsed neutron sources the spectral distribution of the neutrons in the primary electron beam (1) can be detected. Dollars a analysis of a primary neutron beam of a neutron source, in particular a pulsed neutron source yielding cleavage.