GEOMETRIC-OPTICS FOR NONLINEAR CONCENTRATING WAVES IN FOCUSING AND NON-FOCUSING TWO GEOMETRIES
نویسندگان
چکیده
منابع مشابه
Wolter Optics for Neutron Focusing
Focusing optics based on Wolter optical geometries developed for x-ray grazing incidence beams can be designed for neutron beams. Wolter optics are formed by grazing incidence reflections from two concentric conic sections (for example, a paraboloid and a hyperboloid). This has transformed observational X-ray astronomy by increasing the sensitivity by many orders of magnitude for research in as...
متن کاملFocusing Polycapillary Optics and Their Applications
A summary of focusing X ray polycapillary optics is presented including history, theory, modeling, and applications development. The focusing effects of polycapillary optics come from the overlap of the beams from thousands of small hollow glass tubes. Modeling efforts accurately describe optics performance to allow for system development in a wide variety of geometries. The focusing of X ray b...
متن کاملOn Frequency-Focusing Unidirectional Waves
Phase convergence to within lOin mechanically generated waves was achieved at a specified point in a wave flume by frequency focusing. Owing to the presence of nonlinear waves, the crest elevation reaches a maximum somewhat further from the waveboard, where also breaking occurs if the waves are of sufficient size. The critical amplitude for breaking was not in close agreement with previous meas...
متن کاملFocusing of elastic waves for microseismic imaging
Microseismic events generate compressive waves and shear waves which can be recorded at receivers. We present a theory that shows how elastic P and S waves separately backpropagate to the original source location. These refocused P and S wavefields are free of singularities. We also demonstrate a technique that enhances the ability to image the spatial focus for each wave type using elastic wav...
متن کاملImplementation of Horizontal Focusing Optics at Aps
Despite the very small electron beam emittance in thirdgeneration light sources, the horizontal size of the emitted x-ray beam is still determined mainly by the electron beam divergence. Providing a converging electron beam in an undulator straight section can significantly decrease the spot size of the downstream x-rays, which leads to an increase in the photon flux density on the user sample....
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Communications in Contemporary Mathematics
سال: 2004
ISSN: 0219-1997,1793-6683
DOI: 10.1142/s0219199704001239