TY - RPRT
TI - Fusion gain due to high energy ions accelerated by additional heating
AB - In order to investigate a gain of fusion reaction caused by high energy ions, the ICRF wave propagation equation and the Fokker-Planck equation with the effects of particle acceleration due to the rf-electric field are numerically analyzed in a self-consistent manner. In the ICRF and NBI heated plasmas, the input power dependences of fusion output power of D-D, D-{sup 3}He and D-T reactions are calculated and compared with each other. As for the ICRF heating conditions, the higher harmonic resonance up to the third one and phase control of antenna currents are taken into account. To optimize the NBI heating condition on a fusion reaction, the beam energy needs to be exceeded the energy where the fusion cross section is maximum. In the case of ICRF heating, fast ions are accelerated beyond the several MeV by the velocity diffusion coefficient due to rf-electric field in the Fokker-Planck equation. The ICRF heating condition does not affect the fusion output so seriously from this standpoint. As for the D-D reaction, however, the third harmonic resonance heating is more effective than the second one. Because, the fusion cross-section of D-D reaction has a maximum value at high energy range (3 {approx} 4 MeV) and the third harmonic resonance heating accelerates higher energy particles than the second one. On the other hand, in order to avoid the direct power loss by electron Landau damping in the wave propagation process, the phase difference of antenna currents needs to be inphase. (author).
AU - Hamamatsu, Kiyotaka
AU - Azumi, Masafumi [Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment]
AU - Fukuyama, Atsushi
KW - 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
KW - THERMONUCLEAR REACTIONS
KW - EFFICIENCY
KW - ICR HEATING
KW - BEAM INJECTION HEATING
KW - FOKKER-PLANCK EQUATION
KW - MEV RANGE 01-10
KW - WAVE PROPAGATION
KW - PERFORMANCE
KW - COMPARATIVE EVALUATIONS
KW - THERMONUCLEAR REACTORS
KW - 700350
KW - PLASMA PRODUCTION, HEATING, CURRENT DRIVE, AND INTERACTIONS
DO -
UR -
PB -
CY - Japan
PY - 1991
DA - 1991-10-01
LA - Japanese
J2 -
C1 - Japan Atomic Energy Research Inst., Tokyo (Japan)
C2 -
ER -