ICRF heating in several regimes on TFTR

J. C. Hosea, M. Beer, M. G. Bell, M. Bitter, R. Boivin, N. L. Bretz, C. E. Bush, A. Cavallo, T. K. Chu, Samuel A. Cohen, P. L. Colestock, H. F. Dylla, P. C. Efthimion, E. D. Fredrickson, Robert James Goldston, G. J. Greene

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

Over the past year, the two ICRF antennas on TFTR have been used to apply rf powers up to a level of 6 MW. Impurity generation at the antennas has continued to be negligible for the out-of-phase toroidal rf current strap array employed, even at the highest power levels where the average power density at one antenna has exceeded 10 MW/m2. The higher operating power levels have supported explorations of all three plasma regimes of interest - the high-recycling gas-fueled regime, the low-recycling neutral-beam-heated supershot regime, and the low-recycling pellet-fueled regime. Noteworthy results include: ICRF sawtooth stabilization has been demonstrated in all three regimes; fusion reactivity has been significantly enhanced at approximately constant Q in the supershot regime; and efficient core heating at ne(0) ≈ 2.4 × 1014 cm-3 has been demonstrated in the pellet-fuelded regime. Extrapolations of these results to 12.5 MW operations in the D-T phase of TFTR, which is planned to provide relatively high βα (approximately 0.5%) supershots in support of α physics studies and hot high density pellet-fueled regimes in support of ClT operations, are discussed briefly.

Original languageEnglish (US)
Title of host publicationProc 13 Int Conf Plasma Phys Controlled Nucl Fusion Res
PublisherPubl by IAEA
Pages669-677
Number of pages9
ISBN (Print)9201300913
StatePublished - Jan 1 1991

Publication series

NameProc 13 Int Conf Plasma Phys Controlled Nucl Fusion Res

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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