METHOD OF TUNING A MAGNETOOPTICAL SYSTEM OF A PROTONOGRAPHIC COMPLEX (VERSIONS) Russian patent published in 2020 - IPC G01N23/04 

FIELD: physics.

SUBSTANCE: invention can be used for tuning a magnetooptical system of a protonographic complex. Essence of the invention consists in the fact that selection of the optimum diameter of the collimator entering into the magnetooptical system from the point of view of obtaining maximum contrast sensitivity of images, for which the total transmission coefficients of the magnetooptical system K_tot (L, ∅) for collimators of different diameters ∅ depending on the thickness of the object L, considering inelastic nuclear scattering and multiple Coulomb scattering of the proton beam, and performing calculation based on found error function coefficients ε (∅; L=L_obj) for collimators of different diameters at the specified thickness of the investigated object L_obj, optimum diameter of the collimator is selected, at which the error function is minimum, and when determining the total transmission coefficients of the magnetooptical system K_tot (L, ∅) additionally take into account elastic nuclear scattering of high-energy protons, for this purpose in the object plane of the magnetooptical system a radiographic wedge is placed, consisting of at least nine steps, installing the wedge with thickest steps in the center of the object plane, passing the beam of protons through the object plane, obtaining images processing which restore total transmission coefficients K_tot for each step of the radiographic wedge over its central part, plotting a transmission coefficient curve K(L) for each collimator and calculating a relative error ε_fract of determining the number of transmitted protons through a certain thickness stage for the whole set of collimators, and the collimator, for which the given error is minimal, is selected as the object optimal for dimensions for a given thickness.

EFFECT: possibility of obtaining high-quality image of the field of investigation.

2 cl, 2 dwg