Attainment of high fusion reactivity under high bootstrap current fraction in JT-60U
- 1 August 1994
- journal article
- Published by IOP Publishing in Nuclear Fusion
- Vol. 34 (8) , 1069-1079
- https://doi.org/10.1088/0029-5515/34/8/i02
Abstract
The fusion performance of high βp plasmas with significant D-D neutron production up to (5.6 ± 0.6) × 1016 n/s, has been investigated. The attainment of a high fusion triple product, nd(0) τEtotalTi(0), up to (1.1 ± 0.3) × 1021 m-3.s.keV is confirmed by both time dependent and time slice analysis. The highly enhanced confinement of up to 3.6 times ITER-89P scaling is dominated by the improved thermal confinement, and one half of the D-D neutrons come from the thermal reactions. The highest equivalent QDT of approximately 0.56 was obtained. The ratio QDT/QDD is in the range 133-151. More importantly, a high bootstrap current of up to approximately 1 MA (~50% of the total current) was obtained simultaneously with the high fusion performance. These results are quite encouraging as far as the realization of a steady state tokamak reactor is concernedKeywords
This publication has 16 references indexed in Scilit:
- Internal transport barrier onq=3 surface and poloidal plasma spin up in JT-60U high-dischargesPhysical Review Letters, 1994
- A boronization system in the JT-60U tokamak: Application of a new method using a less hazardous substanceFusion Engineering and Design, 1993
- Characteristic peaked profiles of ion temperature and toroidal rotation velocity in JT-60 hot ion modesNuclear Fusion, 1993
- Absolute calibration of the JT-60U neutron monitors using a 252Cf neutron sourcea)Review of Scientific Instruments, 1992
- CO2 laser interferometer for electron density measurement in JT-60U tokamakReview of Scientific Instruments, 1992
- JT-60U latest results and future prospectsPhysics of Fluids B: Plasma Physics, 1992
- Observation of a fast beta collapse during high poloidal-beta discharges in JT-60Physical Review Letters, 1992
- High poloidal beta equilibria in the Tokamak Fusion Test Reactor limited by a natural inboard poloidal field nullPhysics of Fluids B: Plasma Physics, 1991
- Steady state tokamak reactor based on the bootstrap currentNuclear Fusion, 1990
- Frequency-stabilized single-mode cw 118.8-μm CH3OH waveguide laser for large tokamak diagnosticsReview of Scientific Instruments, 1989