نتایج جستجو برای: bragg peak
تعداد نتایج: 149178 فیلتر نتایج به سال:
In this paper we demonstrate a simple temperature and strain discriminating sensor based on a single fibre Bragg grating inscribed by a femtosecond laser via the point-by-point technique. These gratings exhibit strong and extensive cladding mode structures and by simultaneously monitoring both the Bragg wavelength and a cladding mode spaced by ~ 40 nm from the Bragg peak, as a function of both ...
Serial crystallography using X-ray free-electron lasers enables the collection of tens of thousands of measurements from an equal number of individual crystals, each of which can be smaller than 1 µm in size. This manuscript describes an alternative way of handling diffraction data recorded by serial femtosecond crystallography, by mapping the diffracted intensities into three-dimensional recip...
Neutron diffraction measurements have been carried out on a single crystal of the iron-based superconductor system SrFe1.92Ni0.08As2. Nitrogen gas sealed in the sample container was found to produce Bragg peaks over a limited range of temperature that were symmetrically positioned around the strongest magnetic Bragg peak in the system, giving the appearance of transition to an incommensurate ma...
We used photon pulses from an x-ray free-electron laser to study ultrafast x-ray-induced transitions of graphite from solid to liquid and plasma states. This was accomplished by isochoric heating of graphite samples and simultaneous probing via Bragg and diffuse scattering at high time resolution. We observe that disintegration of the crystal lattice and ion heating of up to 5 eV occur within t...
Background: The advantages of proton beam in radiation therapy- like small lateral scattering as well as absence of exit dose tail in the organs which are after the tumor- make it capable of delivering more treatment doses to the target and much lesser to the critical tissues near it. Materials and Methods: In this study, the Monte Carlo MCNPX code has been used to simulate a slab head phantom ...
High temperature is one of the important reasons causing the fire in power system. Therefore, the early warning could be told by monitoring the temperature and effective measures could be taken. The corresponding accidents will be reduced. The traditional transformer winding temperature monitoring methods are electrical signal measurement and infrared measurement. Such electrical signal sensors...
We report observations and measurements of the inscription of fiber Bragg gratings (FBGs) in two different types of microstructured polymer optical fiber: few-mode and an endlessly single mode. Contrary to the FBG inscription in silica microstructured fiber, where high-energy laser pulses are a prerequisite, we have successfully used a low-power cw laser source operating at 325 nm to produce 1 ...
A. I. Gusarov is with the Faculté Polytechnique de Mons and also with the SCK·CEN Belgian Nuclear Research Centre, Mol, Belgium. D. S. Starodubov is with D-STAR Technologies, Inc., USA. F. Berghmans is with the SCK·CEN Belgian Nuclear Research Centre, Mol, and also with the Vrije Universiteit Brussel, Belgium. O. Deparis, Y. Defosse, P. Mégret, and M.Blondel are with the Faculté Polytechnique d...
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