Demonstration of Safe Termination of Megaampere Relativistic Electron Beams in Tokamaks

0554787 - ÚFP 2022 RIV US eng J - Journal Article
Reux, C. - Paz-Soldan, C. - Aleynikov, P. - Bandaru, V. - Ficker, Ondřej - 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. Roč. 126, č. 17 (2021), č. článku 175001. ISSN 0031-9007. E-ISSN 1079-7114
EU Projects: European Commission(XE) 633053 - EUROfusion
Institutional support: RVO:61389021
Keywords : tokamak * electron beam * fusion
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 9.185, year: 2021
Method of publishing: Open access
https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.126.175001

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.
Permanent Link: http://hdl.handle.net/11104/0329437