TFTR confinement results

M. G. Bell, V. Arunsalam, M. Bitter, W. R. Blanchard, F. Boody, N. Bretz, R. Budny, C. E. Bush, J. D. Callen, J. L. Cecchi, Samuel A. Cohen, R. J. Colchin, S. K. Combs, J. Coonrod, S. L. Davis, D. Dimock, H. F. Dylla, P. C. Efthimion, A. C. England, H. P. EubankR. Fonck, E. Fredrickson, L. R. Grisham, Robert James Goldston, B. Grek, R. J. Hawryluk, W. Heidbrink, H. Hendel, K. W. Hill, E. Hinnov, S. Hiroe, R. Hulse, H. Hsuan, D. Johnson, L. C. Johnson, R. Kaita, R. Kamperschroer, S. M. Kaye, S. Kilpatrick, H. Kugel, P. H. LaMarche, R. Little, D. M. 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, W. Morris, D. Mueller, E. Nieschmidt, D. K. Owens, V. K. Pare, H. Park, B. Prichard, A. Ramsey, M. H. Redi, A. L. Roquemore, N. R. Sauthoff, J. Schivell, G. L. Schmidt, S. D. Scott, S. Sesnic, M. Shimada, J. E. Simpkins, J. Sinnis, F. Stauffer, B. Stratton, G. D. Tait, G. Taylor, H. H. Towner, M. Ulrickson, S. Von Goeler, R. Wieland, J. B. Wilgen, M. Williams, K. L. Wong, S. Yoshikawa, K. M. Young, M. C. Zarnstorff, S. Zweben

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

The characteristics of plasma operation on the axisymmetric inner toroidal limiter in TFTR are described. After conditioning, plasmas with low metal content and low zeff are obtained with this limiter. There is no substantial increase in zeff with total input power during neutral beam injection. Compared to operation on the outer blade limiter, additional gas is required to fuel plasmas on the inner limiter. Injection of D pellets increased the plasma density substantially and produced energy confinement times up to 0.5 s in ohmically heated plasmas. The four neutral beam lines have injected up to 13.5 MW total power into the plasma for 0.5 s with up to 90 kV accelerating voltage. The scaling of the plasma stored energy was studied as a function of the input power, plasma current and plasma density. In the range 1.4 to 2.2 MA, the overall and incremental confinement times for both the total and thermal stored energies increase with plasma current at fixed density. There appears to be a weak negative scaling of the total stored energy with density at high injection power.

Original languageEnglish (US)
Article number011
Pages (from-to)1329-1340
Number of pages12
JournalPlasma Physics and Controlled Fusion
Volume28
Issue number9 A
DOIs
StatePublished - Dec 1 1986

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

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    Bell, M. G., Arunsalam, V., Bitter, M., Blanchard, W. R., Boody, F., Bretz, N., Budny, R., Bush, C. E., Callen, J. D., Cecchi, J. L., Cohen, S. A., Colchin, R. J., Combs, S. K., Coonrod, J., Davis, S. L., Dimock, D., Dylla, H. F., Efthimion, P. C., England, A. C., ... Zweben, S. (1986). TFTR confinement results. Plasma Physics and Controlled Fusion, 28(9 A), 1329-1340. [011]. https://doi.org/10.1088/0741-3335/28/9A/011