Abstract
Global energy confinement time in plasmas heated with waves in the ion cyclotron range of frequencies in the Tokamak Fusion Test Reactor is 8%–11% higher in deuterium-tritium (D-T) than in deuterium (D) only plasmas. Kinetic analysis based on local equilibrium profile measurements indicates that the increase in stored energy is almost entirely in the electron component and that the electron thermal diffusivity χe is smaller in D-T than in D plasmas. The implied scaling of χe with normalized ion gyro radius ρ* is opposite to that observed in Joint European Torus (JET) and DIII-D tokamaks when ρ* was varied by changing the magnetic field strength.
Original language | English |
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Pages (from-to) | 1050-1053 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 79 |
Issue number | 6 |
DOIs | |
State | Published - 1 Jan 1997 |