1. NAME AND TITLE
HERAD: Three-Dimensional Monte Carlo Computer Code System for Calculating Radiation
Damage from Ion Beams.
POTEN: Preparation of binary files for input.
University of Wisconsin, Madison, Wisconsin.
3. CODING LANGUAGE AND COMPUTER
Fortran IV; Cray 1.
4. NATURE OF PROBLEM SOLVED
HERAD was developed to study the effect of the microstructure on the range and damage of
implanted ions in materials. Helpful to those looking at differences between theory and experiment,
it predicts the range and damage in homogeneous or inhomogeneous materials, e.g., materials which
contain voids, precipitates or bubbles.
5. METHOD OF SOLUTION
HERAD uses Monte Carlo methods to solve for the deposited ion distribution, energy (damage
energy and electronic energy deposition) distributions, and defects distributions in materials, due to
bombarding the target material with an ion beam. Monoenergetic, Gaussian, or Maxwellian energy
distributions may be used for the incident ions.
6. RESTRICTIONS OR LIMITATIONS
7. TYPICAL RUNNING TIME
Running time depends on the options used. The sample problem required 277.542 Cray-1 cpu
8. COMPUTER HARDWARE REQUIREMENTS
HERAD is operable on the Cray-1 computer.
9. COMPUTER SOFTWARE REQUIREMENTS
For the graphic version, the DISSPLA graphics software package is required.
H. Attaya and G. L. Kulcinski, "User's Manual for HERAD - Heterogeneous Radiation Damage
Monte Carlo Computer Code," UWFDM-479 (September 1982).
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one (1.2MB) DOS diskette which contains the source
code and sample problem input and output.
12. DATE OF ABSTRACT
KEYWORDS: COMPLEX GEOMETRY; MONTE CARLO; RADIATION DAMAGE; HEAVY IONS