Real-time in-situ X-ray beam diagnostics
نویسندگان
چکیده
We report on a novel diagnostics instrument for in-situ imaging and measurements of X-ray beam parameters in real-time. The instrument is based on the robust and simple idea of a pinhole camera that collects the weakly scattered radiation from a thin sheet of a low-Z material placed in the X-ray beam at an acute angle. We demonstrate how by recording the scattered radiation with an appropriate detector, high-resolution beam characterisation can be performed in real-time. We present a mathematical model that describes the imaging process and beam position measurements. The theoretical evaluation of the resolution limit of our device and its dependence on various parameters are also discussed. Reported experimental results demonstrate the instrument’s capabilities in beam tracking and imaging applications.
منابع مشابه
Visualizing aerosol-particle injection for diffractive-imaging experiments.
Delivering sub-micrometer particles to an intense x-ray focus is a crucial aspect of single-particle diffractive-imaging experiments at x-ray free-electron lasers. Enabling direct visualization of sub-micrometer aerosol particle streams without interfering with the operation of the particle injector can greatly improve the overall efficiency of single-particle imaging experiments by reducing th...
متن کاملA portable ultrahigh vacuum organic molecular beam deposition system for in situ x-ray diffraction measurements
A portable UHV molecular beam deposition system has been developed for synthesis, in situ, and real-time x-ray diffraction measurements of organic thin films, multilayers, and superlattices. The system has been optimized for small size, while still incorporating full features necessary to achieve thin film growth under molecular beam epitaxy ~MBE! conditions. It can be used independently for th...
متن کاملOn the resolution and linearity of lensless in situ X-ray beam diagnostics using pixelated sensors.
We present a theoretical model that describes the resolution and linearity of a novel transparent X-ray beam imaging and position measurement method. Using a pinhole or coded aperture camera with pixelated area sensors to image a small fraction of radiation scattered by a thin foil placed at oblique angles with respect to the beam, a very precise measurement of the beam position is made. We sho...
متن کاملReal time in situ hard X-ray texture evolution during the annealing of rolled CuNi tapes
A new real time in-situ scattering method to study texture evolution kinetic is exposed. The technique is adapted from an existing set up used at the Institut Laue-Langevin neutron facility to check monochromators. It uses a white hard X ray beam and works in transmission geometry. The 2D detector allows to follow recrystallization phenomena. A study of the annealing behavior of copper-nickel a...
متن کاملIn situ micro-focused X-ray beam characterization with a lensless camera using a hybrid pixel detector
Results of studies on micro-focused X-ray beam diagnostics using an X-ray beam imaging (XBI) instrument based on the idea of recording radiation scattered from a thin foil of a low-Z material with a lensless camera are reported. The XBI instrument captures magnified images of the scattering region within the foil as illuminated by the incident beam. These images contain information about beam s...
متن کامل