1. NAME AND TITLE

HERAD: Three-Dimensional Monte Carlo Computer Code System for Calculating Radiation Damage from Ion Beams.

AUXILIARY ROUTINE

POTEN: Preparation of binary files for input.

2. CONTRIBUTOR

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

None noted.

7. TYPICAL RUNNING TIME

Running time depends on the options used. The sample problem required 277.542 Cray-1 cpu seconds.

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.

10. REFERENCE

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

June 1983.