Direct recovery of interfacial topography from coherent X-ray reflectivity: model calculations for a 1D interface

Magnetic X-ray Reflectivity

Developing a Compositional Reservoir Model for Investigating the Effect of Interfacial Tension on Oil Recovery

In this paper, a simplified formulation for compositional reservoir simulator is presented. These types of simulators are used when inter-phase mass transfer depends on phase composition as well as pressure. The procedure for solving compositional model equations is completely described. For equilibrium calculation, property estimation Peng Robinson equation of state is used. This equation ...

X-Ray and Neutron Reflectivity

re = 2.818 × 10−15m is the classical electron radius, ρe is the electron density of the material, and μx is the absorption length. With δ > 0 we find that n < 1, which leads to the phenomenon of so-called total external reflection for incident angles αi below the critical angle αc = √ 2δ. Typical values for δ are 10−5 . . . 10−6, and thus αc is in the range of 0.1 ◦ . . . 0.5◦. For simplicity, ...

Optical klystron FEL scheme for x-ray coherent harmonic generation at ISLF storage ring

The possibility of inserting an optical klystron on the storage ring of an Iranian Light Source Facility as a Synchrotron Radiation Free electron Laser for coherence harmonic generation in the soft x-ray spectrum has been studied. The study has been performed using the 3D FEL simulation code GENESIS 1.3 and in accordance with the available characteristic parameters of ISLF. Different potential ...

Model-independent inversion of x-ray or neutron reflectivity data

A technique is described for the model-independent analysis of x-ray or neutron reflectivity data. Rather than trying to find just one optimum solution, the idea is to find the set of solutions that are feasible. The approach is based on inversion of the missing phase information using a feasible set approach coupled with a genetic algorithm search for the set of solutions. It does not require ...