Full conversion from ohmic to runaway electron driven current via massive gas injection in the TCV tokamak

Nuclear Fushion

article

J. Decker¹  G. Papp²  S. Coda¹  B.P. Duval¹  U. Sheikh¹  P. Blanchard¹  D. Choi¹  C. Galperti¹  L. Calacci³  D. Carnevale⁴  O. Ficker⁵  M. Gobbin⁶  B. Labit¹  E. Macusova⁵  J. Mlynar⁵  V. Plyusnin⁷  O. Sauter¹ 

[1] Ecole Polytechnique Fédérale de Lausanne ,(EPFL), Swiss Plasma Center;Max Planck Institute for Plasma Physics;Università di Roma ‘Tor Vergata’;ENEA, Fusion and Nuclear Safety Department;Institute of Plasma Physics of the CAS;Consorzio RFX;Instituto de Plasmas e Fusao Nuclear

关键词: runaway electron;    disruption;    massive gas injection;    tokamak;    neon;    elongation;    runaway electron beam;   

DOI  :  10.1088/1741-4326/ac544e

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

Full conversion from ohmic to runaway electron (RE) driven current was observed in the tokamak à configuration variable (TCV) following massive injection of neon through a disruption mitigation valve into a low-density limited circular plasma. Following a partial disruption, a stable 200 kA RE beam is maintained for more than 1 s. Controlled ramp-down of the RE beam with adjustable decay rate was demonstrated. Control of the beam vertical position was achieved down to a RE current of 20 kA. RE beam formation is observed in elongated plasma configurations up toκ= 1.5. A reproducible scenario for RE beam generation without loss of circulating current is of particular interest for disruption modelling applications.

【 授权许可】

Unknown