EAST (Experimental Advanced Superconducting Tokamak)

EAST (Experimental Advanced Superconducting Tokamak)
Name	EAST (Experimental Advanced Superconducting Tokamak)
Location	Hefei, Anhui, People's Republic of China
Type	Tokamak
Operator	Institute of Plasma Physics, Chinese Academy of Sciences
Construction	1996–2006
Operation	2006–present
Major modifications	2010–2014, 2016–2019

EAST (Experimental Advanced Superconducting Tokamak) is a superconducting tokamak operated by the Institute of Plasma Physics, Chinese Academy of Sciences in Hefei, Anhui. It is a flagship device for magnetic confinement fusion research in the People's Republic of China and a testbed for technologies intended for large projects such as ITER and potential future devices like CFETR. EAST explores steady-state operation, advanced plasma scenarios, and superconducting magnet technologies relevant to international fusion programs including collaborations with agencies and laboratories such as ITER Organization, EUROfusion, Culham Centre for Fusion Energy, and national institutes in United States Department of Energy, Japan Atomic Energy Agency, and Korea Institute of Fusion Energy.

Overview

EAST was proposed by the Chinese Academy of Sciences and built at the Hefei Science City campus of the Institute of Plasma Physics, Chinese Academy of Sciences to demonstrate long pulse operation using high-temperature superconducting magnet systems influenced by concepts from tokamaks such as JET, TFTR, DIII-D, ASDEX Upgrade, and JT-60. The machine contributes to international fusion research dialogues involving organizations like ITER Organization, ITER Council, and multinational programs including International Tokamak Physics Activity. EAST serves as a platform for trials of heating systems derived from work at Princeton Plasma Physics Laboratory, Lawrence Livermore National Laboratory, and partners in European Commission projects.

Design and Technology

EAST employs a fully superconducting toroidal field coil system based on niobium-titanium technology similar to developments at Cadarache, Oak Ridge National Laboratory, and Kurchatov Institute programs. The vacuum vessel and divertor follow design traditions seen in ASDEX Upgrade and JET with tungsten and graphite components researched with input from teams at Los Alamos National Laboratory and Rutherford Appleton Laboratory. Auxiliary systems include neutral beam injection modeled after systems at ITER, radiofrequency heating units inspired by Ecole Polytechnique Fédérale de Lausanne collaborations, and diagnostics developed jointly with FOM Institute and Swiss Plasma Center. EAST integrates cryogenic plants, power supplies, and real-time control architectures influenced by systems at General Atomics and Tokyo Institute of Technology.

Operational History

Construction began after approval by the Chinese Academy of Sciences in the late 1990s with first plasma achieved in 2006, followed by progressive upgrades coordinated with stakeholders including Ministry of Science and Technology (China), National Natural Science Foundation of China, and international partners from European Union research consortia. Major upgrade phases in the 2010s installed new superconducting coils, enhanced heating from collaborations with ITER Organization teams, and divertor modifications reflecting research at Culham Centre for Fusion Energy and IPP Garching. EAST achieved record long-pulse discharges in campaigns during the 2010s and 2020s with contributions from visiting researchers affiliated with Massachusetts Institute of Technology, University of Oxford, and Tsinghua University.

Scientific Achievements and Research Programs

EAST has demonstrated long-pulse H-mode and L-mode scenarios of direct relevance to ITER and conceptual designs like CFETR and influenced physics studies from programs such as ITPA and EUROfusion task forces. Research programs have targeted plasma edge control, divertor heat flux management, and runaway electron mitigation in collaboration with specialists from Princeton Plasma Physics Laboratory, Max Planck Institute for Plasma Physics, and Korea Institute of Fusion Energy. EAST hosted coordinated experiments under frameworks used by International Energy Agency fusion working groups and supported doctoral and postdoctoral research at institutions including Peking University, Fudan University, and University of California, San Diego.

Plasma Physics and Experimental Results

Experimental campaigns produced sustained high-performance plasmas with electron cyclotron resonance heating and lower hybrid current drive informed by work at IPP Garching and CEA. Results include extended steady-state operation, improved confinement studies comparable to results from JET and DIII-D, and divertor experiments leveraging tungsten research from Culham and LANL investigations. EAST studies of turbulent transport, magnetohydrodynamic stability, and neoclassical tearing modes engaged collaborators from École Polytechnique, University of Tokyo, and McGill University, while diagnostics advances paralleled developments at Lawrence Berkeley National Laboratory and EPFL.

Collaborations and International Contribution

EAST participates in joint experiments, technology exchanges, and training programs with institutions such as ITER Organization, EUROfusion, Princeton Plasma Physics Laboratory, Culham Centre for Fusion Energy, Japan Atomic Energy Agency, Korea Institute of Fusion Energy, Max Planck Institute for Plasma Physics, MIT, and Tsinghua University. The device contributes data to multinational databases used by the International Tokamak Physics Activity and supports technology validation for future devices like CFETR and conceptual designs assessed by panels including experts from IAEA advisory missions. EAST’s international engagement includes hosting visiting scientists, co-authored publications with teams from University of Oxford, Imperial College London, Kyoto University, and capacity-building initiatives with regional partners in ASEAN and beyond.

Category:Tokamaks Category:Chinese Academy of Sciences Category:Fusion reactors