ShadowOui: a new visual environment for X-ray optics and synchrotron beamline simulations

A new computer environment to perform simulations on synchrotron experiments has been designed. It performs ray-tracing simulations using the popular ray-tracing codeSHADOW. With this new application one can define, in a very easy and elegant way, one or several optical systems (beamlines) and perform calculations of the propagation of the X-ray beam through it. Many complementary tools and supplementary calculations improve and extend the functionality ofSHADOWto deal with complex optical system optimization, including compound optical elements, iterative calculations, some sample simulations, and implementing corrections for wave opticsviaa hybrid model.

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Third-order aberration of soft X-ray optical systems with orthogonal and coplanar arrangement of the main planes of elements

Journal of Synchrotron Radiation ◽

10.1107/s1600577520010474 ◽

2020 ◽

Vol 27 (6) ◽

pp. 1477-1484

Author(s):

Yiqing Cao ◽

Zhijuan Shen ◽

Haihe Xie

Keyword(s):

Optical System ◽

Optical Systems ◽

Analysis Method ◽

Third Order ◽

Optical Elements ◽

Analytical Analysis ◽

X Ray ◽

Plane Symmetric ◽

Design And Optimization ◽

Aberration Theory

A third-order aberration analytical analysis method of soft X-ray optical systems with orthogonal and coplanar arrangement of the main planes of elements is proposed. Firstly, the transfer equations of the aperture ray and the principle ray are derived; then, based on the third-order aberration theory with the aperture-ray coordinates on the reference exit wavefront of a plane-symmetric optical system, the aberration expressions contributed by the wave aberration and defocus of this kind of optical system are studied in detail. Finally, the derived aberration calculation expressions are applied to calculate the aberration of two design examples of such types of optical systems; the images are compared with ray-tracing results obtained using the Shadow software to validate the aberration expressions. The study shows that the accuracy of the aberration expressions is satisfactory. The analytical analysis method of aberration is helpful in the design and optimization of the soft X-ray optical systems with orthogonal and coplanar arrangement of the main planes of optical elements.

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X-Ray and Neutron Radiography System Optimization by Means of a Multiobjective Approach and a Simplified Ray-Tracing Method

Nuclear Technology ◽

10.1080/00295450.2020.1740562 ◽

2020 ◽

pp. 1-20

Author(s):

Robert Nshimirimana ◽

Ajith Abraham ◽

Gawie Nothnagel ◽

Andries Engelbrecht

Keyword(s):

Ray Tracing ◽

Neutron Radiography ◽

System Optimization ◽

Ray Tracing Method ◽

X Ray ◽

Radiography System ◽

Multiobjective Approach ◽

Tracing Method

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Probing the spatial coherence of wide X-ray beams with Fresnel mirrors at BL25SU of SPring-8

Journal of Synchrotron Radiation ◽

10.1107/s1600577519002583 ◽

2019 ◽

Vol 26 (3) ◽

pp. 756-761

Author(s):

Yoko Takeo ◽

Hiroto Motoyama ◽

Yasunori Senba ◽

Hikaru Kishimoto ◽

Haruhiko Ohashi ◽

...

Keyword(s):

Optical System ◽

Spatial Coherence ◽

Optical Systems ◽

X Rays ◽

X Ray ◽

Interference Fringes ◽

Radiation Sources ◽

Wide Wavelength Range ◽

Valuable Method ◽

The Relationship

Probing the spatial coherence of X-rays has become increasingly important when designing advanced optical systems for beamlines at synchrotron radiation sources and free-electron lasers. Double-slit experiments at various slit widths are a typical method of quantitatively measuring the spatial coherence over a wide wavelength range including the X-ray region. However, this method cannot be used for the analysis of spatial coherence when the two evaluation points are separated by a large distance of the order of millimetres owing to the extremely narrow spacing between the interference fringes. A Fresnel-mirror-based optical system can produce interference patterns by crossing two beams from two small mirrors separated in the transverse direction to the X-ray beam. The fringe spacing can be controlled via the incidence angles on the mirrors. In this study, a Fresnel-mirror-based optical system was constructed at the soft X-ray beamline (BL25SU) of SPring-8. The relationship between the coherence and size of the virtual source was quantitatively measured at 300 eV in both the vertical and horizontal directions using the beam. The results obtained indicate that this is a valuable method for the optimization of optical systems along beamlines.

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Method of calculating the aberrations of soft X-ray and vacuum ultraviolet optical systems

Journal of Synchrotron Radiation ◽

10.1107/s1600577519007823 ◽

2019 ◽

Vol 26 (5) ◽

pp. 1558-1564

Author(s):

Yiqing Cao ◽

Zhijuan Shen ◽

Zhixia Zheng

Keyword(s):

Optical System ◽

Vacuum Ultraviolet ◽

Optical Systems ◽

Third Order ◽

Order Accuracy ◽

X Ray ◽

Plane Symmetric ◽

The Third ◽

Aberration Theory ◽

Ray Coordinates

Based on the the third-order aberration theory of plane-symmetric optical systems, this paper studies the effect on aberrations of the second-order accuracy of aperture-ray coordinates and the extrinsic aberrations of this kind of optical system; their calculation expressions are derived. The resultant aberration expressions are then applied to calculate the aberrations of two design examples of soft X-ray and vacuum ultraviolet (XUV) optical systems; images are compared with ray-tracing results using SHADOW software to validate the aberration expressions. The study shows that the accuracy of the aberration expressions is satisfactory.

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Ray Tracing Of X-Ray Optical Systems: Source Models.

10.1117/12.961842 ◽

1989 ◽

Cited By ~ 1

Author(s):

Franco Cerrina

Keyword(s):

Ray Tracing ◽

Optical Systems ◽

X Ray ◽

Source Models

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Refractive optical elements and optical system for high energy x-ray microscopy

10.1063/1.3703354 ◽

2012 ◽

Author(s):

M. Simon ◽

V. Altapova ◽

T. Baumbach ◽

M. Kluge ◽

A. Last ◽

...

Keyword(s):

Optical System ◽

High Energy ◽

Optical Elements ◽

X Ray

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Combined finite elements and ray-tracing analysis for the optical system of JET-X x-ray telescope

10.1117/12.140600 ◽

1993 ◽

Author(s):

Giancarlo Parodi ◽

Renzo Buzzi ◽

Oberto Citterio ◽

Paolo Conconi

Keyword(s):

Finite Elements ◽

Ray Tracing ◽

Optical System ◽

X Ray

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MODELING AND PERFORMANCE EVALUATION OF OPTICAL SYSTEMS USING SKEW RAY TRACING

Transactions of the Canadian Society for Mechanical Engineering ◽

10.1139/tcsme-2007-0009 ◽

2007 ◽

Vol 31 (2) ◽

pp. 143-156

Author(s):

Te-Tan Liao ◽

Jing-Fung Lin

Keyword(s):

Ray Tracing ◽

Optical System ◽

Monochromatic Light ◽

Merit Function ◽

Optical Systems ◽

Optical Aberrations ◽

Algebra Approach ◽

Homogeneous Transformation Matrix ◽

Overall Performance ◽

And Performance

This paper applies a computational geometric algebra approach based on a 4 x 4 homogeneous transformation matrix to model optical systems and to evaluate their performance. In the proposed approach, the directions of the refracted/reflected rays at each boundary in the optical system are determined using skew ray tracing based upon Snell’s law. The differential changes in the image coordinates caused by optical aberrations are derived for both polychromatic and monochromatic light by applying a sensitivity analysis approach. Finally, a merit function is constructed comprising five individual defect items in order to evaluate the overall performance of a generic optical system. The proposed analytical approach provides a comprehensive and robust approach for the modeling and evaluation of optical systems.

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