Woelter Instrument-Optical Design

Advancing the Technology R&D of Tabletop Mesoscale Nondestructive Characterization

“…This system was designed to characterize mesoscale objects to submicrometer spatial resolutions. [Nederbragt, 2002] A code has been developed to model the 2D image formation in a Wolter x-ray microscope. [Jackson, 2004] A series of simulations using various objects were run to study the effects of the optics, neglecting scattering and reflection losses (Figure 2).…”

Wolter X-Ray Microscope Computed Tomography Ray-Trace Model with Preliminary Simulation Results

“…The total amount of x-ray attenuation through a given material is related to the linear attenuation coefficient and the distance the x-rays travel through the material. If I o is the number of x-ray photons entering an object and I is the number of x-rays exiting, then the attenuation of the x-rays is represented by Equation 1.…”

“…The estimated projection is compared to the real projection values and the difference is used to create a better guess of the value of the object. CCG provides a very efficient method for guessing the next estimate of the object [1].…”

High-Accuracy X-ray Imaging of Meso-scale Targets -- Final Report

“…This is far from our original goal, but it still appears to be the most promising design. The details of the optical design can be found in UCRL-ID-150702 [2].…”

“…The optic is essential to the success of the Wölter microscope. The optic requires a super-polished internal surface that uses multilayer coatings to enhance performance (see the optical design report [2] for more details on multilayers). Machining an optical shell and polishing the inside surface is extremely difficult.…”