DEVELOPMENT OF 2D AND 3D TRANSIENT ELECTRO-THERMAL COMPUTATIONAL MODELS TO PREDICT THE RADIATION FAILURES IN SIC-BASED SCHOTTKY DIODES AND POWER FIELD-EFFECT TRANSISTORS (FETS) THE OVERALL GOAL OF THE PROPOSED PROJECT IS TO ADVANCE THE UNDERSTANDING OF RADIATION FAILURE MECHANISM IN SILICON CARBIDE (SIC) MATERIALS FOR POWER DEVICES AND PROVIDE THE GUIDELINES TO DESIGN AND FABRICATE SIC-BASED DEVICES WITH HIGHER RESISTANCE TO RADIATION SINGLE-EVENT EFFECTS (SEES). TO REALIZE THE GOAL THREE KEY AND CENTRAL OBJECTIVES ARE PROPOSED: (1) DEVELOP PHYSICS-BASED 2D AND 3D TRANSIENT ELECTRO-THERMAL COMPUTATIONAL MODELS TO PREDICT RADIATION FAILURES IN VERTICAL SIC-BASED POWER DEVICES SUBJECT TO HEAVYION RADIATION (2) VALIDATE THE DEVELOPED MODELS VIA COMPARISONS WITH TESTING AND EXPERIMENTATION OF SIC SCHOTTKY DIODES AND METAL OXIDE SEMICONDUCTOR FIELD-EFFECT TRANSISTORS (MOSFETS) AND (3) OPTIMIZE SCHOTTKY DIODES AND MOSFET DESIGNS FOR RADIATION RESISTANCE BY SIMULATIONS BASED ON THE DEVELOPED MODELS. TO ACCOMPLISH THE PROPOSED OBJECTIVES WE WILL COMPLETE A SERIES OF TASKS THAT COVER THE FOLLOW WORKSCOPES: DEVELOP DEVICE PHYSICS-BASED COMPUTATIONAL MODELS THAT PREDICT RADIATION-INDUCED THERMAL DAMAGE IN SIC MATERIALS FOR POWER DEVICES. AUGMENT ANALYTICAL MODELING OF DEVICE DEGRADATION BY INTEGRATING PHYSICS-BASED MODELS INTO FINITE ELEMENT METHOD (FEM) BASED TCAD DEVICE SIMULATIONS. TEST AND VALIDATE THE COMPUTATIONAL MODELS BY COMPARING WITH RADIATION DAMAGE EXPERIMENTS. INVESTIGATE THE IMPACT OF DEVICE DESIGN PARAMETERS ON THE SEE FAILURE FOR SCHOTTKY DIODES AND MOSFETS. PERFORM COMPARATIVE DEVICE EVALUATIONS BETWEEN BASELINE AND IMPROVED DEVICES (WITH OPTIMAL DESIGNS). THE COMPLETION OF THE PROPOSED PROJECT WILL ASSURE THE OPPORTUNITY FOR THE SAFE DEPLOYMENT OF THE HIGH VOLTAGE SIC-BASED ELECTRONIC DEVICES FOR SPACE SCIENCE AND EXPLORATION NEEDS. ONCE THE RADIATION FAILURE MECHANISM IS CLEAR WE CAN DESIGN AND BUILD ELECTRONIC SYSTEMS WITH THE MOST RADIATION HARDENING DIODES OR TRANSISTORS THAT SERVE AS KEY COMMUNICATION OR PROPULSION COMPONENTS. THESE SYSTEMS CAN BE INSTALLED TO SPACECRAFT OR SATELLITES TO FACILITATE KEY SPACE MISSIONS EVEN IF SUBJECT TO STRONG SPACE RADIATIONS.