MAST-Upgrade Divertor Facility and Assessing Performance of Long-Legged Divertors

TL;DR

The paper discusses the upgrade of the MAST divertor facility to test long-legged divertor geometries, including the Super-X configuration, aiming to improve high-power tokamak performance through experimental validation.

Contribution

It introduces the MAST upgrade enabling diverse divertor leg geometries to experimentally evaluate effects of connection length and flux expansion.

Findings

Enhanced divertor configurations tested on MAST upgrade

Potential improvements in plasma handling for high-power tokamaks

Validation of Super-X divertor design concepts

Abstract

A potentially important feature in a divertor design for a high-power tokamak is an extended and expanded divertor leg. The upgrade to MAST will allow a wide range of such divertor leg geometries to be produced, and hence will allow the roles of greatly increased connection length and flux expansion to be experimentally tested. This will include testing the potential of the Super-X configuration [1]. The design process for the upgrade has required analysis of producing and controlling the magnetic configurations, and has included consideration of the roles that divertor closure and increasing magnetic connection length will play.