Validation of SVR model predictions and performance optimization

2024 Research Campaign, Thrust: Shape Rise Divertor

Purpose of Experiment

This foundational experiment aims to address a critical challenge in the development of magnetic fusion energy by testing the EPED model, which predicts a high-performance regime known as the Super H mode. Due to recent upgrades of the DIII-D facility, allowing for higher shaping and larger volume, EPED predicts wide access to the Super H-mode, enabling discharges with high pedestal pressure and density, through strong plasma shaping and high plasma current. Successful testing and validation of the EPED model will enhance confidence in its projections for future fusion devices, marking a significant step forward in the quest for sustainable and efficient magnetic fusion energy. The experiment is part of the Shape and Volume Rise Campaign on the DIII-D facility. Future fusion devices are anticipated to function under conditions of low collisionality and high density, resulting in an opaque scrape-off layer (SOL) where neutrals fail to effectively fuel the plasma, leading to low density gradients. Previous experiments on the DIII-D tokamak were unable to achieve these conditions, which are crucial for closing the Integrated Tokamak Exhaust Performance (ITEP) gap, also known as Core-Edge Integration (CEI).