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Reux C, Paz-Soldan C, Aleynikov P, Bandaru V, Ficker O, Silburn S, Hoelzl M, Jachmich S, Eidietis N, Lehnen M, Sridhar S. Demonstration of Safe Termination of Megaampere Relativistic Electron Beams in Tokamaks. PHYSICAL REVIEW LETTERS 2021; 126:175001. [PMID: 33988418 DOI: 10.1103/physrevlett.126.175001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Revised: 02/19/2021] [Accepted: 03/16/2021] [Indexed: 06/12/2023]
Abstract
For the first time it is experimentally demonstrated on the JET tokamak that a combination of a low impurity concentration bulk plasma and large magnetohydrodynamic instabilities is able to suppress relativistic electron beams without measurable heat loads onto the plasma facing components. Magnetohydrodynamic simulations of the instability and modeling of the postinstability plasma confirm the prompt loss of runaways and the absence of regeneration during the final current collapse. These surprising findings motivate a new approach to dissipate runaway electrons generated during tokamak plasma disruptions.
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Affiliation(s)
- Cédric Reux
- CEA-IRFM, F-13108 Saint-Paul-les-Durance, France
| | - Carlos Paz-Soldan
- General Atomics, P.O. Box 85608 San Diego, California 92186-5608, USA and Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, USA
| | | | | | - Ondrej Ficker
- Institute of Plasma Physics of the CAS, Za Slovankou 1782/3, 182 00 Praha 8, Czech Republic
| | - Scott Silburn
- CCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom
| | | | - Stefan Jachmich
- ITER Organization, Route de Vinon sur Verdon, 13115 St. Paul Lez Durance, France
| | - Nicholas Eidietis
- General Atomics, P.O. Box 85608 San Diego, California 92186-5608, USA
| | - Michael Lehnen
- ITER Organization, Route de Vinon sur Verdon, 13115 St. Paul Lez Durance, France
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Saint-Laurent F, Martin G, Alarcon T, Le Luyer A, Pastor P, Putvinski S, Vincent B, Bucalossi J, Bremond S, Moreau P, Nardon E, Reux C. FIRE, a novel concept of massive gas injection for disruption mitigation in ITER: Validation on Tore Supra. FUSION ENGINEERING AND DESIGN 2014. [DOI: 10.1016/j.fusengdes.2014.09.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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