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Titolo:
DEUTERIUM-TRITIUM PLASMAS IN NOVEL REGIMES IN THE TOKAMAK FUSION TESTREACTOR
Autore:
BELL MG; BATHA S; BEER M; BELL RE; BELOV A; BERK H; BEMABEI S; BITTER M; BREIZMAN B; BRETZ NL; BUDNY R; BUSH CE; CALLEN J; CAUFFMAN S; CHANG CS; CHANG Z; CHENG CZ; DARROW DS; DENDY RO; DORLAND W; DUONG H; EFTHIMION PC; ERNST D; EVENSON H; FISCH NJ; FISHER R; FONCK RJ; FREDRICKSON ED; FU GY; FURTH HP; GORELENKOV NN; GOLOBORODKO VY; GREK B; GRISHAM LR; HAMMETT GW; HAWRYLUK RJ; HEIDBRINK W; HERRMANN HW; HERMANN MC; HILL KW; HOGAN J; HOOPER B; HOSEA JC; HOULBERG WA; HUGHES M; JASSBY DL; JOBES FC; JOHNSON DW; KAITA R; KAYE S; KESNER J; KIM JS; KISSICK M; KRASILNIKOV AV; KUGEL H; KUMAR A; LAM NT; LAMARCHE P; LEBLANC B; LEVINTON FM; LUDESCHER C; MACHUZAK J; MAJESKI RP; MANICKAM J; MANSFIELD DK; MAUEL M; MAZZUCATO E; MCCHESNEY J; MCCUNE DC; MCKEE G; MCGUIRE KM; MEADE DM; MEDLEY SS; MIKKELSEN DR; MIRNOV SV; MUELLER D; NAGAYAMA Y; NAVRATIL GA; NAZIKIAN R; OKABAYASHI M; OSAKABE M; OWENS DK; PARK HK; PARK W; PAUL SF; PETROV MP; PHILLIPS CK; PHILLIPS M; PHILLIPS P; RAMSEY AT; RICE B; REDI MH; REWOLDT G; REZNIK S; ROQUEMORE AL; ROGERS J; RUSKOV E; SABBAGH SA; SASAO M; SCHILLING G; SCHMIDT GL; SCOTT SD; SEMENOV I; SENKO T; SKINNER CH; STEVENSON T; STRAIT EJ; STRATTON BC; STRACHAN JD; STODIEK W; SYNAKOWSKI E; TAKAHASHI H; TANG W; TAYLOR G; THOMPSON MW; VONGOELER S; VONHALLE A; WALTERS RT; WANG S; WHITE R; WIELAND RM; WILLIAMS M; WILSON JR; WONG KL; WURDEN GA; YAMADA M; YAVORSKI V; YOUNG KM; ZAKHAROV L; ZARNSTORFF MC; ZWEBEN SJ;
Indirizzi:
PRINCETON UNIV,PLASMA PHYS LAB,POB 451 PRINCETON NJ 08543
Titolo Testata:
Physics of plasmas
fascicolo: 5, volume: 4, anno: 1997,
parte:, 2
pagine: 1714 - 1724
SICI:
1070-664X(1997)4:5<1714:DPINRI>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
REVERSED MAGNETIC SHEAR; DIII-D; CONFINEMENT; TFTR; STABILITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
M.G. Bell et al., "DEUTERIUM-TRITIUM PLASMAS IN NOVEL REGIMES IN THE TOKAMAK FUSION TESTREACTOR", Physics of plasmas, 4(5), 1997, pp. 1714-1724

Abstract

Experiments in the Tokamak Fusion Test Reactor (TFTR) [Phys. Plasmas 2, 2176 (1995)] have explored several novel regimes of improved tokamak confinement in deuterium-tritium (D-T) plasmas, including plasmas with reduced or reversed magnetic shear in the core and high-current plasmas with increased shear in the outer region (high l(i)). New techniques have also been developed to enhance the confinement in these regimes by modifying the plasma-limiter interaction through in situ deposition of lithium. In reversed-shear plasmas, transitions to enhanced confinement have been observed at plasma currents up to 2.2 MA (q(a) approximate to 4.3), accompanied by the formation of internal transport barriers, where large radial gradients develop in the temperature and density profiles. Experiments have been performed to elucidate the mechanism of the barrier formation and its relationship with the magnetic configuration and with the heating characteristics. The increased stability of high-current, high-l(i) plasmas produced by rapid expansion ofthe minor cross section, coupled with improvement in the confinement by lithium deposition has enabled the achievement of high fusion power, up to 8.7 MW, with D-T neutral beam heating. The physics of fusion alpha-particle confinement has been investigated in these regimes, including the interactions of the alphas with endogenous plasma instabilities and externally applied waves in the ion cyclotron range of frequencies. In D-T plasmas with q(0) > 1 and weak magnetic shear in the central region, a toroidal Alfven eigenmode instability driven purely by the alpha particles has been observed for the first time. The interactions of energetic ions with ion Bernstein waves produced by mode conversion from fast waves in mixed-species plasmas have been studied as a possible mechanism for transferring the energy of the alphas to fuel ions. (C) 1997 American Institute of Physics.

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Documento generato il 26/11/20 alle ore 11:01:25