Divertor Tokamak Test (DTT)

Intelligence Summary: Divertor Tokamak Test (DTT) Facility

Node Identity: The Divertor Tokamak Test (DTT) facility is Italy's next-generation fusion experiment, currently under construction at the ENEA Frascati Research Centre. DTT is designed with "breakeven class performance" and is projected to be "one of the world's most advanced tokamaks in the next decade." Its primary mission is to explore alternative divertor configurations for heat exhaust — one of the main engineering challenges toward building a fusion power plant. DTT is operated by DTT S.c.a r.l., a consortium founded in 2019, and is a key milestone of the European Fusion Roadmap. The European Investment Bank (EIB) is financing the project.

Strategic Relevance: DTT's strategic relevance to the FRC/plasma weapons landscape is substantial. As a breakeven-class tokamak, DTT will operate in plasma regimes (high temperature, high density, significant fusion product generation) that generate weapons-relevant plasma physics knowledge. The divertor heat exhaust research directly addresses plasma-material interaction at extreme heat fluxes — a dual-use capability relevant to both fusion energy and weapons-related thermal protection systems. DTT's ECRH (Electron Cyclotron Resonance Heating) system, housed in Building 173 (under construction as of May 2026), represents advanced RF plasma heating technology. The DTT Research Plan was developed by an international team of approximately 100 European fusion scientists from 20 research institutes across 10 countries, making DTT a node in the broader European fusion knowledge network. The Frascati 14-MeV Neutron Generator at the same site provides complementary fusion neutronics capability.

Technical Focus / Capabilities: DTT is designed for breakeven-class performance with a focus on alternative divertor configurations for heat exhaust management. The facility targets operation in the late 2020s, with construction planned for the 2018-2025 period. Key systems include the ECRH (Electron Cyclotron Resonance Heating) system with gyrotrons housed in Building 173. The DTT Research Plan encompasses divertor physics, plasma confinement, MHD stability, and plasma-wall interaction studies. The project builds on FTU's legacy of RF heating expertise and ENEA's broader fusion capabilities including superconducting materials development, divertor target manufacturing, nuclear safety design, fusion neutronics, and liquid metal blanket technology validation at the ENEA Brasimone centre.

Network Linkage: DTT maintains 2 documented connections: DTT succeeds FTU (generational progression from decommissioned high-field tokamak) and ENEA Frascati develops DTT (construction at Frascati site). DTT is funded through EUROfusion Italy and the European Investment Bank. The DTT Research Plan involves 100+ European fusion scientists from 20 research institutes across 10 countries. CNR-ISTP collaborates with ENEA Frascati on fusion research including DTT-related activities. The consortium DTT S.c.a r.l. (founded 2019) operates the facility.