Fusion core start-up, ignition and burn simulations of reversed-field pinch (RFP) reactors

Abstract

Experimental (HBTX1A) and theoretical RFP magnetic field profiles 7 F-0 trajectories of Taylor's model and some experiments 9 Comparison of q(r) profiles for Tokamak and RFP 12 Measured fi(r) profile from OHTE experiment 26 Density, temperature, pressure and fi profile models for TITAN RFP reactor design 64 The F-© trajectories for TITAN profile models. The trajectory for Bessel function model is also included for comparison 65 The relationship between 9 0 and 0 for TITAN RFP profiles 66 The magnetic-field, current-density and q(r) profiles for steady-state TITAN RFP reactor 68 Contours of constant plasma current for the TITAN RFP design.. . 86 Contours of constant temperature without soft-beta limit 88 A typical start-up scenario 91 Density and temperature evolutions of an optimized operation, subject to start-up constraints 93 Operation contour for the optimized case 95 Variation of I p /N for the optini'i2ed operation 36 Over-fueling case : ignition is not achieved in time 97 vi 16 Under-fueling case : ignition is not achieved in time ,. 17 Cross-sectional view of the TITAN RFP reactor 110 18 Vertical field produced from each set of coils. Shafranov requirement is included for comparison 112 19 Variations of the vertical-field index showing that the stability condition is satisfied 113 Evolution of coil and plasma currents in the start-up simulation.. . .114 Coil voltages, plasma loop voltage and the volt-second consumption.. 115 Electric powers in the coils. The huge powers in BF and OH coils during the first second are provided by OH discharge. Actual grid power is only needed in the slow-ramp phase