Community Research and Development Information Service - CORDIS

Abstract

THE TRIDYN PROGRAM SIMULATES A BEAM OF FAST IONS ENTERING A SOLID. FAST RECOIL ATOMS FROM ATOMIC COLLISIONS MAY INITIATE COLLISION CASCADES OF TARGET ATOMS. THESE MAY LEAVE THE SURFACE (SPUTTERING) OR BE DEPOSITED AT A NEW SITE. IN THE CASE OF LARGE IMPLANTATION FLUENCES, THE DEPOSITION OF THESE AND PROJECTILE IONS CAUSES ION MIXING, CHANGES OF SURFACE COMPOSITION AND ION IMPLANTATION WITH A STATIONARY RANGE PROFILE. THE MODEL USES THE BINARY COLLISION APPROXIMATION FOR AMORPHOUS SUBSTANCE, A SCREENED COULOMB POTENTIAL FOR NUCLEAR COLLISIONS AND FREE ELECTRON-GAS APPROXIMATIONS FOR THE ELECTRONIC ENERGY LOSS. AFTER EACH INCIDENT PROJECTILE AND ITS ASSOCIATED CASCADES, THE LOCAL PARTIAL DENSITY OF THE CONSTITUENTS ARE RE-ARRANGED ACCORDING TO THEIR ATOMIC VOLUMES. RUN TIME FOR THE VECTORISED VERSION OF TRIDYN IS TYPICALLY 18 MINUTES FOR ENERGIES BELOW 1 KEV/AMU. THE PROGRA IS VALID FOR THE ENERGY RANGE IEV/AMU TO 25 KEV/AMU.

Additional information

Authors: MOLLER W, MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, MUENCHEN, D;ECKSTEIN W MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, MUENCHEN, D, MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, MUENCHEN, D
Bibliographic Reference: REPORT IPP-9/64, 1988, AVAILABILITY: MAX-PLANCK-INSTITUT, 8046-GARCHING BEI MUENCHEN, D
Record Number: 1989126229900 / Last updated on: 1989-04-01
Category: PUBLICATION
Available languages: en
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top