Effects of magnetic geometry, fluctuations, and electric fields on confinement in the Advanced Toroidal Facility

R. C. Isler, S. Aceto, L. R. Baylor, T. S. Bigelow, G. L. Bell, J. D. Bell, B. A. Carreras, R. J. Colchin, E. C. Crume, N. Dominguez, R. A. Dory, J. L. Dunlap, G. R. Dyer, A. C. England, R. F. Gandy, J. C. Glowienka, G. R. Hanson, J. H. Harris, S. Hiroe, L. D. HortonT. C. Jernigan, H. Ji, R. A. Langley, D. K. Lee, K. M. Likin, J. F. Lyon, C. H. Ma, S. Morimoto, M. Murakami, H. Okada, A. L. Qualls, D. A. Rasmussen, J. A. Rome, M. Sato, J. G. Schwelberger, M. G. Shats, J. E. Simpkins, C. E. Thomas, T. Uckan, M. R. Wade, J. B. Wilgen, W. R. Wing, H. Yamada, J. J. Zielinski

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Abstract

Recent experiments in the Advanced Toroidal Facility (ATF) [Fusion Technol. 10, 179 (1986)] have been directed toward investigations of the basic physics mechanisms that control confinement in this device. Measurements of the density fluctuations throughout the plasma volume have provided indications for the existence of theoretically predicted dissipative trapped electron and resistive interchange instabilities. These identifications are supported by results of dynamic configuration scans of the magnetic fields during which the magnetic well volume, shear, and fraction of confined trapped particles are changed continuously. The influence of magnetic islands on the global confinement has been studied by deliberately applying error fields which strongly perturb the nested flux-surface geometry, and the effects of electric fields have been investigated by means of biased limiter experiments.

Original languageEnglish (US)
Pages (from-to)2104-2110
Number of pages7
JournalPhysics of Fluids B
Volume4
Issue number7
DOIs
StatePublished - 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

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    Isler, R. C., Aceto, S., Baylor, L. R., Bigelow, T. S., Bell, G. L., Bell, J. D., Carreras, B. A., Colchin, R. J., Crume, E. C., Dominguez, N., Dory, R. A., Dunlap, J. L., Dyer, G. R., England, A. C., Gandy, R. F., Glowienka, J. C., Hanson, G. R., Harris, J. H., Hiroe, S., ... Zielinski, J. J. (1992). Effects of magnetic geometry, fluctuations, and electric fields on confinement in the Advanced Toroidal Facility. Physics of Fluids B, 4(7), 2104-2110. https://doi.org/10.1063/1.860018