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&TARGET

 

This record is used to describe the target.

ATMAT --- Atomic Fraction and Material

This variable is a string array specifying the elements (chemical abbreviations) and their atomic fractions in dependence of the regions. The only index corresponds to the region number according to the numbering in the geometry file. The chemical abbreviations in one region as well as the strings describing different regions must be separated by commas ( Note: strings must be enclosed by single quotes!). Relative fractions of elements in one region must, if necessary at all, be specified right after the corresponding chemical abbreviation without a blank, comma or any other character inbetween. ATMAT='SI,O2','AL2,O3','AL99,CU', for instance, means that there are three regions, the first consisting of one part silicon (Si) and two parts oxygen (O), corresponding to silicon-dioxide (SiO2), the second consisting of two parts aluminum and three parts oxygen (Al2O3), and the third consisting of 99 parts aluminum and one part copper. The relative fractions in each region will be automatically normalized to unity. This means 'Si,O2' and Si0.33,O0.77 is equivalent.

CGFILE --- Geometry File Name

This variable must contain the name of a geometry file. The required syntax is described in Chapter 6.6.

DENS --- Density

This variable specifies the densities of the regions in .

NREG --- Number of Regions

This variable specifies the number of target regions.



Horst Wagner
Tue Mar 19 10:24:55 MET 1996