Using the BASIC MODE

The BASIC MODE shall provide the program user with a simple program interface that should be sufficient for most purposes. It includes

(a) the most important physical input parameters
(b) the name of the output file for the impact-parameter dependent electronic energy transfer
(c) two output fields (INFO box and INTEGRATED RESULTS box)
(d) two graphics output buttons (GRAPHICS and PLOT)

The buttons ’?’ provide additional information on the projectile and target properties. Some quantities, such as mean projectile charge-state or projectile velocity, are used in the calculations. Other quantities, such as masses or the target density, are given just for your convenience.

The STORE button allows to save the electron density of each shell for the selected target. The output file names are HFSsss.dat, where sss denotes the subshell. Each line of the output file contains the radial distance in Å and the electron density in Å^-3.

The button START CALCULATION starts the numerical solution for an adjusted grid of impact parameters and for all target-electron shells. In order to save computing time, we advise to perform some test calculations for light targets to get used to the program. The default projectile-screening is derived from an automatic adjustment using mean-charge state fits and a single-parameter screening-length. Furthermore, the more accurate UCA model is selected as the default model.

If only the stopping cross-section is required (no impact parameter dependence), the check box "Store impact parameter dependence" can be unchecked. This will speed up the calculations.

The button HELP invokes this on-line help system.

The button EXIT stops the program CasP.