FIELD: physics.
SUBSTANCE: invention is used for tuning the magneto-optical system of the protonographic complex. The essence of the invention lies in the fact that a proton beam is passed through the object plane of a magneto-optical system (MOS), which includes magnetic lenses and a collimator, and is sequentially obtained using an image registration system of a test object placed in the object plane, changing the magnitude of the magnetic lens current with a step, corresponding to the required tuning accuracy of the magneto-optical system, the intensity profiles of the proton beam are determined, which are plotted from the obtained images of the test object, according to which the optimal current value is determined, at which the magnetic induction of the magneto-optical system is matched to the energy of the proton beam, while additionally tuning is carried out for specific thickness of the object studies, for which a stepped part is used as a test object, the thickness of the steps of which are selected in the range overlapping the thickness of the investigated object, the test object is oriented in steps along the proton beam, the intensity profiles of the proton beam are in the direction perpendicular to the boundary of the steps of the test object, when the steps of the test object are close in thickness, in the neighborhood, the obtained profiles are approximated by a given function, as a result, the dependence of the amount of blurring on the thickness of the object is obtained, the thickness for which the amount of blur is minimal, and will be optimal for obtaining the minimum blur at a given current in the MOS, and to determine the optimal magnitude of the magnetic lens current, the value is chosen at which the blur against the background of given thickness is minimal.
EFFECT: improving accuracy and objectivity of setting the MOS for a certain thickness of the object.
1 cl, 9 dwg
