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

Rodriguez-Fernandez, P.; White, A. E.; Howard, N. T.; Grierson, B. A.; Staebler, G. M.; Rice, J. E.; Yuan, X.; Cao, N. M.; Creely, A. J.; Greenwald, M. J.; Hubbard, A. E.; Hughes, J. W.; Irby, J. H.; Sciortino, F.

doi:10.7910/DVN/FJ2HKQ

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

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Abstract

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 time scales faster than an energy confinement time, which has long been interpreted as strong evidence of nonlocal transport. This Letter shows that the steady-state profiles, the cold-pulse rise time, and disappearance at higher density as measured in these experiments are successfully captured by a recent local quasilinear turbulent transport model, demonstrating that the existence of nonlocal transport phenomena is not necessary for explaining the behavior and time scales of cold-pulse experiments in tokamak plasmas.

Authors:

Rodriguez-Fernandez, P.; White, A. E.; Howard, N. T.; Grierson, B. A.; Staebler, G. M.; Rice, J. E.; Yuan, X.; Cao, N. M.; Creely, A. J.; Greenwald, M. J.; Hubbard, A. E.; Hughes, J. W.; Irby, J. H.; Sciortino, F.

OSTI

Publication Date:: Wed Sep 19 00:00:00 EDT 2018

DOE Contract Number:: FC02-99ER54512; SC0014264

Research Org.:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center

Sponsoring Org.:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

OSTI Identifier:: 1878736

DOI:: https://doi.org/10.7910/DVN/FJ2HKQ

Citation Formats


                    Rodriguez-Fernandez, P., White, A. E., Howard, N. T., Grierson, B. A., Staebler, G. M., Rice, J. E., Yuan, X., Cao, N. M., Creely, A. J., Greenwald, M. J., Hubbard, A. E., Hughes, J. W., Irby, J. H., and Sciortino, F. Explaining Cold-Pulse Dynamics in Tokamak Plasmas Using Local Turbulent Transport Models.  United States: N. p., 2018. 
        Web.  doi:10.7910/DVN/FJ2HKQ.

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                    Rodriguez-Fernandez, P., White, A. E., Howard, N. T., Grierson, B. A., Staebler, G. M., Rice, J. E., Yuan, X., Cao, N. M., Creely, A. J., Greenwald, M. J., Hubbard, A. E., Hughes, J. W., Irby, J. H., & Sciortino, F. Explaining Cold-Pulse Dynamics in Tokamak Plasmas Using Local Turbulent Transport Models.  United States.  doi:https://doi.org/10.7910/DVN/FJ2HKQ

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                    Rodriguez-Fernandez, P., White, A. E., Howard, N. T., Grierson, B. A., Staebler, G. M., Rice, J. E., Yuan, X., Cao, N. M., Creely, A. J., Greenwald, M. J., Hubbard, A. E., Hughes, J. W., Irby, J. H., and Sciortino, F. 2018.  
"Explaining Cold-Pulse Dynamics in Tokamak Plasmas Using Local Turbulent Transport Models".  United States.  doi:https://doi.org/10.7910/DVN/FJ2HKQ.  https://www.osti.gov/servlets/purl/1878736. Pub date:Wed Sep 19 00:00:00 EDT 2018

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@article{osti_1878736,

  title        = {Explaining Cold-Pulse Dynamics in Tokamak Plasmas Using Local Turbulent Transport Models},

  author       = {Rodriguez-Fernandez, P. and White, A. E. and Howard, N. T. and Grierson, B. A. and Staebler, G. M. and Rice, J. E. and Yuan, X. and Cao, N. M. and Creely, A. J. and Greenwald, M. J. and Hubbard, A. E. and Hughes, J. W. and Irby, J. H. and Sciortino, F.},

  abstractNote = {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 time scales faster than an energy confinement time, which has long been interpreted as strong evidence of nonlocal transport. This Letter shows that the steady-state profiles, the cold-pulse rise time, and disappearance at higher density as measured in these experiments are successfully captured by a recent local quasilinear turbulent transport model, demonstrating that the existence of nonlocal transport phenomena is not necessary for explaining the behavior and time scales of cold-pulse experiments in tokamak plasmas.},

  doi          = {10.7910/DVN/FJ2HKQ},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Wed Sep 19 00:00:00 EDT 2018},

  month        = {Wed Sep 19 00:00:00 EDT 2018}

}

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DOI: https://doi.org/10.7910/DVN/FJ2HKQ

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