Runaway electron beam generation and mitigation during disruptions at JET-ILW

0453589 - ÚFP 2016 RIV AT eng J - Článek v odborném periodiku
Reux, C. - Plyusnin, V. - Alper, B. - Alves, D. - Bazylev, B. - Belonohy, E. - Boboc, A. - Brezinsek, S. - Coffey, I. - Decker, J. - Drewelow, P. - Devaux, S. - de Vries, P.C. - Fil, A. - Gerasimov, S. - Giacomelli, L. - Jachmich, S. - Khilkevitch, E.M. - Kiptily, V. - Koslowski, R. - Kruezi, U. - Lehnen, M. - Lupelli, I. - Lomas, P. J. - Manzanares, A. - Martin De Aguilera, A. - Matthews, G.F. - Mlynář, Jan - Nardon, E. - Nilsson, E. - Perez von Thun, C. - Riccardo, V. - Saint-Laurent, F. - Shevelev, A.E. - Sips, G. - Sozzi, C.
Runaway electron beam generation and mitigation during disruptions at JET-ILW.
Nuclear Fusion. Roč. 55, č. 9 (2015), 093013-093013. ISSN 0029-5515. E-ISSN 1741-4326
Institucionální podpora: RVO:61389021
Klíčová slova: runaway electrons * disruptions * tokamak * JET * massive gas injection * disruption mitigation * runaway background plasma
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 4.040, rok: 2015
http://iopscience.iop.org/article/10.1088/0029-5515/55/9/093013

Disruptions are a major operational concern for next generation tokamaks, including ITER. They may generate excessive heat loads on plasma facing components, large electromagnetic forces in the machine structures and several MA of multi-MeV runaway electrons. A more complete understanding of the runaway generation processes and methods to suppress them is necessary to ensure safe and reliable operation of future tokamaks. Runaway electrons were studied at JET-ILW showing that their generation dependencies (accelerating electric field, avalanche critical field, toroidal field, MHD fluctuations) are in agreement with current theories. In addition, vertical stability plays a key role in long runaway beam formation.Energies up to 20 MeV are observed. Mitigation of an incoming runaway electron beam triggered by massive argon injection was found to be feasible provided that the injection takes place early enough in the disruption process.
Trvalý link: http://hdl.handle.net/11104/0254347