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Harrer GF, Faitsch M, Radovanovic L, Wolfrum E, Albert C, Cathey A, Cavedon M, Dunne M, Eich T, Fischer R, Griener M, Hoelzl M, Labit B, Meyer H, Aumayr F. Quasicontinuous Exhaust Scenario for a Fusion Reactor: The Renaissance of Small Edge Localized Modes. PHYSICAL REVIEW LETTERS 2022; 129:165001. [PMID: 36306746 DOI: 10.1103/physrevlett.129.165001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 07/08/2022] [Accepted: 08/08/2022] [Indexed: 06/16/2023]
Abstract
Tokamak operational regimes with small edge localized modes (ELMs) could be a solution to the problem of large transient heat loads in fusion reactors. A ballooning mode near the last closed flux surface governed by the pressure gradient and the magnetic shear there has been proposed for small ELMs. In this Letter, we experimentally investigate several stabilizing effects near the last closed flux surface and present linear ideal simulations that indeed develop ballooninglike fluctuations there and connect them with nonlinear resistive simulations. The dimensionless parameters of the small ELM regime in the region of interest are very similar to those in a reactor, making this regime the ideal exhaust scenario for a future device.
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Affiliation(s)
- G F Harrer
- Institute of Applied Physics, TU Wien, Fusion@ÖAW, Vienna, Austria
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - M Faitsch
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - L Radovanovic
- Institute of Applied Physics, TU Wien, Fusion@ÖAW, Vienna, Austria
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - E Wolfrum
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - C Albert
- Institute of Theoretical and Computational Physics, TU Graz, Graz, Austria
| | - A Cathey
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - M Cavedon
- Dipartimento di Fisica "G. Occhialini," Università di Milano-Bicocca, Milano, Italy
| | - M Dunne
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - T Eich
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - R Fischer
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - M Griener
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - M Hoelzl
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - B Labit
- École Polytechnique Fédérale de Lausanne (EPFL), Swiss Plasma Center (SPC), CH-1015 Lausanne, Switzerland
| | - H Meyer
- CCFE, Culham Science Centre, Abingdon, Oxon, United Kingdom
| | - F Aumayr
- Institute of Applied Physics, TU Wien, Fusion@ÖAW, Vienna, Austria
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Zheng J, Qin J, Lu K, Xu M, Duan X, Xu G, Hu J, Gong X, Zang Q, Liu Z, Wang L, Ding R, Chen J, Li P, Xue L, Cai L, Song Y. Recent progress in Chinese fusion research based on superconducting tokamak configuration. Innovation (N Y) 2022; 3:100269. [PMID: 35815072 PMCID: PMC9256834 DOI: 10.1016/j.xinn.2022.100269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 06/08/2022] [Indexed: 11/24/2022] Open
Abstract
Fusion energy is a promising source of clean energy, which could solve energy shortages and environmental pollution. Research into controlled fusion energy has been ongoing for over half a century. China has created a clear roadmap for magnetic confinement fusion development, where superconducting tokamaks will be used in commercial fusion reactors. The Experimental Advanced Superconducting Tokamak (EAST) is the world’s first fully superconducting tokamak with upper and lower divertors, which aims at long-pulse, steady-state, H-mode operation, and 101-s H-mode discharge had been achieved. In 2007, China joined the International Thermonuclear Experimental Reactor (ITER) and became one of its seven members. Thirteen procurement packages are undertaken by China, covering superconducting magnets, power supplies, plasma-facing components (PFCs), diagnostics, etc. To bridge the gap between the ITER and fusion demonstration power plants (DEMOs), China is planning to build the Chinese Fusion Engineering Testing Reactor (CFETR) to demonstrate related technologies and physics models. The engineering design of the CFETR was completed in 2020, and Comprehensive Research Facilities for Fusion Technology (CRAFT) are being constructed to explore the key technologies used in the CFETR. Fusion energy is a promising source of clean energy Tokamak is the most widely studied magnetic confinement fusion device China built the world’s first fully superconducting tokamak -EAST China is one of the seven members of the ITER project CFETR engineering design has been completed, and its R&D is ongoing
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