Confinement studies of neutral beam heated discharges in TFTR

M. Murakami, V. Arunasalam, J. D. Bell, M. G. Bell, M. Bitter, W. R. Blanchard, F. Boody, N. Bretz, R. Budny, C. E. Bush, J. D. Callen, J. L. Cecchi, S. Cohen, R. J. Colchin, S. K. Combs, J. Coonrod, S. L. Davis, D. Dimock, H. F. Dylla, P. C. EfthimionL. C. Emerson, A. C. England, H. P. Eubank, R. Fonck, E. Fredrickson, H. P. Furth, L. R. Grisham, S. Von Goeler, R. J. Goldston, B. Grek, R. Groebner, R. J. Hawryluk, H. Hendel, K. W. Hill, D. L. Hillis, W. Heidbrink, R. Hulse, D. Johnson, L. C. Johnson, R. Kaita, R. Kamperschroer, S. M. Kaye, S. Kilpatrick, H. Kugel, P. H. LaMarche, R. Little, C. H. Ma, D. Manos, D. Mansfield, M. McCarthy, R. T. McCann, D. C. McCune, K. McGuire, D. M. Meade, S. S. Medley, S. L. Milora, D. R. Mikkelsen, D. Mueller, E. Nieschmidt, D. K. Owens, V. K. Pare, H. Park, B. Prichard, A. Ramsey, D. A. Rasmussen, M. H. Redi, A. L. Roquemore, P. H. Rutherford, N. R. Sauthoff, J. Schivell, G. L. Schmidt, S. D. Scott, S. Sesnic, M. Shimada, J. E. Simpkins, J. Sinnis, F. Stauffer, J. Strachan, B. Stratton, G. D. Tait, G. Taylor, C. E. Thomas, H. H. Towner, M. Ulrickson, R. Wieland, J. B. Wilgen, M. Williams, K. L. Wong, S. Yoshikawa, K. M. Young, M. C. Zarnstorff, S. Zweben

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51 Scopus citations

Abstract

The TFTR tokamak has reached its original machine design specifications (Ip=2.5 MA and BT=5.2 T). Recently, the D degrees neutral beam heating power has been increased to 6.3 MW. By operating at low plasma current (Ip approximately=0.8 MA) and low density (ne approximately=1*1019 m-3), high ion temperatures (9+or-2 keV) and rotation speeds (7*105 m/s) have been achieved during injection. At the opposite extreme, pellet injection into high current plasmas has been used to increase the line-average density to 8*10 19 m-3 and the central density to 1.6*10 20 m-3. This wide range of operating conditions has enabled the authors to conduct scaling studies of the global energy confinement time in both ohmically and beam heated discharges as well as more detailed transport studies of the profile dependence.

Original languageEnglish (US)
Article number003
Pages (from-to)17-27
Number of pages11
JournalPlasma Physics and Controlled Fusion
Volume28
Issue number1 A
DOIs
StatePublished - 1986

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Keywords

  • Tokamaks, TFTR, Confinement, Neutral Beam Injection, Ohmic Heating, Scaling

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