Explaining Cold-Pulse Dynamics in Tokamak Plasmas Using Local Turbulent Transport Models

P. Rodriguez-Fernandez, A. E. White, N. T. Howard, B. A. Grierson, G. M. Staebler, J. E. Rice, X. Yuan, N. M. Cao, A. J. Creely, M. J. Greenwald, A. E. Hubbard, J. W. Hughes (+2 others)
2018 Physical Review Letters  
A long standing enigma in plasma transport has been resolved by modeling of cold-pulse experiments conducted on the Alcator C-Mod tokamak. Controlled edge cooling of fusion plasmas triggers core electron heating on timescales faster than an energy confinement time, which has long been interpreted as strong evidence of non-local transport. This work shows that the steady state profiles, the cold-pulse rise time and disappearance at higher density as measured in these experiments are successfully
more » ... ts are successfully captured by a recent local quasilinear turbulent transport model, demonstrating that the existence of non-local transport phenomena is not necessary for explaining the behavior and timescales of cold-pulse experiments in tokamak plasmas.
doi:10.1103/physrevlett.120.075001 pmid:29542943 fatcat:kya3vjfdzzcfxbofoer6piu5zy