Jet experiments with 120 kev3he and4he neutral beam injection and neutron diagnostic applications

F. B. Marcus, D. V. Bartlett, V. Bhatnagar, A. J. Bickley, M. Bures, D. J. Campbell, C. D. Challis, J. Christiansen, S. Conroy, J. G. Cordey, W. Core, S. Corti, G. Cottrell, H. De Esch, L. De Kock, T. Elevant, H. Falter, R. Giannella, R. D. Gill, A. GondhalekarN. A. Gottardi, R. Hemsworth, O. N. Jarvis, T. T.C. Jones, R. Konig, P. Lomas, M. Loughlin, C. Lowry, G. Magyar, W. Mandl, P. Massmann, P. Morgan, H. Morsi, P. Nielsen, W. Obert, J. O’ Rourke, R. Prentice, G. Sadler, P. Smeulders, M. Stamp, D. F. Start, D. Stork, D. Summers, H. Summers, L. Svensson, A. Tanga, A. Taroni, P. R. Thomas, E. Thompson, B. Tubbing, F. Tibone, P. Van Belle, M. Von Hellermann, N. Watkins, J. M. Adams, L. G. Eriksson, J. Jacquinot

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9 Scopus citations

Abstract

Preliminary experiments were carried out in the Joint European Torus (JET) using 120 keV helium (He) neutral beam injection (NB1), Injected power levels up tn 5 MW with3He and 7 MW with4Hc, lasting up to 3 s were reached. The 3 s helium NBI produced efficient ion heating and similar global and local energy confinements to those obtained with deuterium (D) NBI, in both limiter and X-point plasma geometries, in L-mode and H-mode plasma regimes. The elimination of beam-plasma and beam- beam fusion reactions by replacing D NBI with He NBI extended the range for measuring ion temperatures with the JET neutron profile monitor and neutron spectrometers.

Original languageEnglish
Pages (from-to)1371-1378
Number of pages8
JournalPlasma Physics and Controlled Fusion
Volume34
Issue number8
DOIs
StatePublished - Aug 1992
Externally publishedYes

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