Bifocal Miniature Toroidal Shaped X-ray Mirrors

Evaluation of the Effect of Source Geometry on the Output of Miniature X-ray Tube for Electronic Brachytherapy through Simulation

Objective: The use of miniature X-ray source in electronic brachytherapy is on the rise so there is an urgent need to acquire more knowledge on X-ray spectrum production and distribution by a dose. The aim of this research was to investigate the influence of target thickness and geometry at the source of miniature X-ray tube on tube output.Method: Five sources were simulated based on problems e...

Design of a new soft X-ray double crystal monochromator beamline, BL-13

A new soft X-ray double crystal monochromator beamline is designed and will be constructed at BL-13. Special care is paid for the degree of parallelism of the beam and the beam size at the focal point. We propose to use two toroidal mirrors, one for producing a parallel beam and another for focusing the beam at the sample position. Although a toroidal mirror is not ideal to produce a parallel b...

Miniature lightweight X-ray optics (MiXO) for surface elemental composition mapping of asteroids and comets

The compositions of diverse planetary bodies are of fundamental interest to planetary science, providing clues to the formation and evolutionary history of the target bodies and the solar system as a whole. Utilizing the X-ray fluorescence unique to each atomic element, X-ray imaging spectroscopy is a powerful diagnostic tool of the chemical and mineralogical compositions of diverse planetary b...

AIAA 2002-5030 Tracking and pointing of target by a Bifocal Relay Mirror Spacecraft using attitude control and fast steering mirrors tilting

GRINDING OF ASPHERICAL SiC MIRRORS

This paper describes the methods using bonded cup wheels for grinding toroidal and cylindrical SiC mirrors with large curvature radii. Since the angle between the cutting direction of bonded abrasives and feed direction of the cup wheel is about 90 °, it is possible to obtain a surface with very low surface roughness independent of the direction of measurement. Toroidal mirrors, circular and el...