CALCULATION OF CAPILLARY PARAMETERS FOR THE CHARACTERIZATION OF X-RAYMICROBEAMS

In this work, parameters such as transmission efficiency and intensity gain are calculated for different energies, geometrical shapes and ca pillary dimensions. These parameters are obtained by using a mathemati cal model which calculates photon transport along these devices. The m odel assumes the usage of a monochromatic radiation source with simila r characteristics to those of synchrotron light, that is, a very small source with a low angular divergence. Due to the cylindrical symmetry presented by the problem, the mathematical description of the capilla ries is a two-dimensional model represented by two curves which determ ine the capillary profile. In this work we have adopted the mathematic al representation of the capillary profiles by means of straight segme nts which simulate the theoretical curve of the profile. The results o btained show interesting characteristics and are in good agreement wit h the models proposed by other authors.