Method for acquiring minimum image disk widening by combining synchronous radiation trapezoid vertical focus lens and gravity bending

Abstract

The invention discloses a method for acquiring gravity associated bending combined with minimum image disk of a synchrotron radiation trapezoid vertical focus lens. The method comprises the following steps of: establishing a gravity-containing differential equation with which the bending reflection accords according to the beam bending theory of material mechanics; establishing an image disk widening function caused by the lens shape error of the focus lens; calculating a design parameter which makes the image disk widening function acquire the minimum value; and determining the parameters of the focus lens according to the above calculation result and bending the focus lens. By the method, the gravity surface shape error is eliminated, surface shape slope error and image disk widening are greatly reduced, and the surface shape slope error and the image disk widening of the method of gravity associated bending combined with the minimum image disk are greatly reduced on the basis of the gravity associated bending method.

Description

technical field [0001] The invention relates to a method for synchrotron radiation trapezoidal vertical focusing mirror gravity co-bending combined with minimum image span, which can eliminate self-gravity surface shape errors, and belongs to the technical fields of synchrotron radiation beamline engineering and synchrotron radiation optics. Background technique [0002] One of the advantages of synchrotron radiation is its high brightness. Brightness generally refers to the photon number density in the phase space. The high photon flux of synchrotron radiation and the small volume of the phase space create the characteristics of high brightness. According to Liu Wei's theorem, the brightness cannot be increased without sacrificing the photon flux. When the line width of a beam is compressed, its angular width increases; conversely, when the angular width is compressed so that the beam becomes more collimated, its line width increases. However, different experiments have d...

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Problems solved by technology

[0028] The purpose of the present invention is to provide a method for obtaining the combined minimum image span of gravity co-bending of synchrotron radiation trapezoidal vertical focusing mirror, so as to solve the problems existing in the prior art that it is difficult to better eliminate the gravity surface error due to the passive processing of gravity influence, and the failure to realize the trapezoidal shape Minimization of image spot broadening in mirror focus

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