
doi: 10.2172/10112038
The goal for advanced steady-state operation in ITER should be to demonstrate the operation of the plasma core for a steady-state fusion reactor. To accomplish this the authors must develop steady-state operating scenarios at high beta for high fusion power density, low auxiliary power requirements (Q{sub CD} {ge} 25, where Q{sub CD} {triple_bond}P fusion/P{sub CD} and P{sub DC} is the power required for sustaining the plasma current) for low recirculating power requirements, and at moderate safety factor (q{sub {psi}} {le} 4.5) to minimize the cost for the tokamak core of a steady-state demonstration power reactor based on the operating modes demonstrated in ITER. The key to achieving steady-state operation at high fusion power in ITER will be the development of operating scenarios with very high bootstrap current fractions (f{sub BS} {ge} 90%) in which the radial profile of the bootstrap current density is well aligned with that of the total plasma current density, and for which the MHD {beta}-limit exceeds {beta}{sub n}{sup *} = 0.05 T{minus}m/MA. They are in the process of developing such operating modes for ITER. In {section}1 they propose two advanced steady-state operating points; a preliminary operating point that was the basis for the MHD studies reportedmore » in {section}2, and a second operating point that has been optimized based on the authors studies to date. In {section}2 they present calculations indicating that the initial operating point is stable to MHD ballooning and low-n kink modes (with a conducting wall at r = 1.25a) up to {beta}{sub n}{sup *} {approx} 6 {times} 10{sup {minus}2} T {minus} m/MA. In {section}3 they present a free-boundary MHD equilibrium, and show that advanced steady-state operating modes are compatible with the ITER poloidal field system and diverter.« less
Theoretical Data 700412, Ballooning Instability, 70 Plasma Physics And Fusion Technology, Demonstration Programs, Magnetic Confinement Devices, Kink Instability, Steady-State Fusion Reactors, Iter Tokamak, Operation
Theoretical Data 700412, Ballooning Instability, 70 Plasma Physics And Fusion Technology, Demonstration Programs, Magnetic Confinement Devices, Kink Instability, Steady-State Fusion Reactors, Iter Tokamak, Operation
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