Ion thermal confinement in the enhanced-confinement regime of the TFTR tokamak

R. J. Fonck, R. Howell, K. Jaehnig, L. Roquemore, G. Schilling, S. Scott, M. C. Zarnstorff, C. Bush, R. Goldston, H. Hsuan, D. Johnson, A. Ramsey, J. Schivell, H. Towner

Research output: Contribution to journalArticle

36 Scopus citations

Abstract

Central ion temperatures up to 30 keV and rotation speeds up to 8×105 m/sec have been confirmed with new diagnostic measurements in the TFTR hot-ion enhanced-confinement regime, and the ion thermal diffusivity is found to be non-neoclassical and comparable to the anomalous electron thermal diffusivity. The dominant effect of strong rotation is the down-shifting of the neutral beam energies in the plasma frame, which results in reduced ion and electron heating on axis, and the presence of off-axis ion heating from viscous damping of the plasma rotation.

Original languageEnglish (US)
Pages (from-to)520-523
Number of pages4
JournalPhysical review letters
Volume63
Issue number5
DOIs
StatePublished - Jan 1 1989

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Ion thermal confinement in the enhanced-confinement regime of the TFTR tokamak'. Together they form a unique fingerprint.

  • Cite this

    Fonck, R. J., Howell, R., Jaehnig, K., Roquemore, L., Schilling, G., Scott, S., Zarnstorff, M. C., Bush, C., Goldston, R., Hsuan, H., Johnson, D., Ramsey, A., Schivell, J., & Towner, H. (1989). Ion thermal confinement in the enhanced-confinement regime of the TFTR tokamak. Physical review letters, 63(5), 520-523. https://doi.org/10.1103/PhysRevLett.63.520