Simulation of x-ray transmission through an ellipsoidal capillary

Abstract

This paper develops a simulation program for x-ray transmission in an ellipsoidal capillary based on a ray-tracing method. The influence of the parameters of ellipsoidal capillary and x-ray energy on transmission efficiency, full width at half maximum and power density gain of x-ray beams through an ellipsoidal capillary was analysed by this program. It shows that the particular rules of the ellipsoidal capillary x-ray lens are different from the polycapillary lens. Furthermore, this analysis method can be applied to the optimized design of ellipsoidal capillary.

Speed limit effect during lane change in a two-lane lattice model under V2X environment

“…These traffic factors are mainly connected with the differences of flux and density. [24][25][26][27][28][29][30][31][32] Also, the impact of traffic information in lattice models has been attracted by scholars, which covered the time delay, [33][34][35][36][37][38] the interruption probability, [39,40] the driver's anticipation [41][42][43][44][45] and others. Moreover, the lane-changing phenomenon also attracts the interest of some scholars.…”

A simple calibration procedure of polycapillary based portable micro‐XRF spectrometers for reliable quantitative analysis of cultural heritage materials

“…A number of direct and indirect methods have been proposed towards an analytical description of the lens transmission efficiency . A direct determination of the X‐ray lens efficiency is based on the measurement of the energy distribution of the exciting beam at the focal spot of the X‐ray lens with and without the presence of the lens (using a pinhole, for example) .…”