1. NAME AND TITLE

TRIPOS: Monte Carlo Ion Transport Analysis Code.

2. CONTRIBUTOR

University of California, Los Angeles, California.

3. CODING LANGUAGE AND COMPUTER

Fortran 77, Cray.

4. NATURE OF PROBLEM SOLVED

TRIPOS is a versatile Monte Carlo ion transport analysis code. It has been applied to the treatment of both surface and bulk radiation effects. The media considered is composed of multilayer polyatomic materials.

5. METHOD OF SOLUTION

TRIPOS couples the power-law cross sections and universal potentials together to treat the atomic collision process. This coupling is made possible by the development of the Blanchard-Ghoniem-Chou integration scheme for the atomic scattering integral.

6. RESTRICTIONS OR LIMITATIONS

Graphics routines have been disabled in the RSIC source.

7. TYPICAL RUNNING TIME

On a Cray X-MP, the sputtering problem took about 0.3 seconds of cpu time; the ion implantation problem took about 1287 seconds; the surface modification and evolution problem took about 30 seconds.

8. COMPUTER HARDWARE REQUIREMENTS

TRIPOS runs on various Cray computers: Cray 1, Cray 2 and Cray X-MP.

9. COMPUTER SOFTWARE REQUIREMENTS

The CFT compiler is required.

10. REFERENCE

P. S. Chou, "A User's Manual For the Computer Code TRIPOS," UCLA/ENG-8807 (March 1988).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one 360 kilobyte double sided, double density diskette containing the source and sample cases.

12. DATE OF ABSTRACT

January 1989.