نتایج جستجو برای: flow channeling
تعداد نتایج: 484121 فیلتر نتایج به سال:
The feasibility to generate powerful monochromatic radiation of the undulator type in the gamma region of the spectrum by means of planar channeling of ultrarelativistic electrons in a periodically bent crystal is proven. It is shown that to overcome the restriction due to the smallness of the dechanneling length, an electron-based crystalline undulator must operate in the regime of higher beam...
For any trajectory of a particle in a crystal a time-reversed trajectory is possible. The starting point of a trajectory becomes the final one, and vice versa. This leads to the idea of reversibility of the dechanneling processes [1]. In the depth of a crystal, besides the particles leaving the channeling mode (dechanneling or feeding out), there may be particles entering the channeling mode (r...
we study the existence of soliton solutions for a class of quasilinear elliptic equation in $mathbb{textbf{r}}^2$ with critical exponential growth. this model has been proposed in the self-channeling of a high-power ultra short laser in matter.
It is shown that the charged particles are refracted and reflected on the boundary of field free and laser field regions in vacuum. Simple and transparent estimates are given which show the possibility of channeling of charged and neutral particles having polarizability by strong electromagnetic field of certain laser bunches just as by the field of orientated crystalline planes and axes. These...
Monte Carlo simulations of anomalous ion channeling in near-lattice-matched AlInN/GaN bilayers allow an accurate determination of the strain state of AlInN by Rutherford backscattering or channeling. Although these strain estimates agree well with x-ray diffraction (XRD) results, XRD composition estimates are shown to have limited accuracy, due to a possible deviation from Vegard's law, which w...
A new diffraction-channeling effect has been discovered, in which Kikuchi or channeling line patterns formed by high energy electrons, neutrons, and positrons are shown to break up into a series of annular disks if the crystal thickness traversed by the beam is small. The disks may be interpreted as Gabor in-line holograms of strings of atoms projected along the beam path. For electrons or posi...
We report an experimental observation suggesting plasma channel formation by focusing a relativistic laser pulse into a long-scale-length preformed plasma. The channel direction coincides with the laser axis. Laser light transmittance measurement indicates laser channeling into the high-density plasma with relativistic self-focusing. A three-dimensional particle-in-cell simulation reproduces th...
This work experimentally investigates the effects of an interstitial fluid on the discharge of granular material within an hourglass. The experiments include observations of the flow patterns, measurements of the discharge rates, and pressure variations for a range of different fluid viscosities, particle densities and diameters, and hourglass geometries. The results are classified into three r...
[1] Precipitation over and near mountains is not caused by topography but, rather, occurs when storms of a type that can occur anywhere (deep convection, fronts, tropical cyclones) form near or move over complex terrain. Deep convective systems occurring near mountains are affected by channeling of airflow near mountains, capping of moist boundary layers by flow subsiding from higher terrain, a...
Abstract The national policy of peak carbon dioxide emission and neutrality has pointed out the technological direction for development petroleum industry in China. In order to efficiently utilize CO 2 gas source enhance oil recovery, n -butylamine is taken as plugging channeling agent experiment study plug produced channeling-path during process flooding ultra-low permeability reservoir. conte...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید