Simulations of DT experiments in TFTR

Technical Report · Sun Dec 01 04:00:00 EST 1991

DOI:https://doi.org/10.2172/5928517· OSTI ID:5928517

Budny, R; Bell, M G; Biglari, H; Bitter, M; Bush, C; Cheng, C Z; Fredrickson, E; Grek, B; Hill, K W; Hsuan, H; Janos, A; Jassby, D L; Johnson, D; Johnson, L C; LeBlanc, B; McCune, D C; Mikkelsen, D R; Park, H; Ramsey, A T; Sabbagh, S A ; Scott, S; Schivell, J; Strachan, J D; Stratton, B C; Synakowski, E; Taylor, G; Zarnstorff, M C; Zweben, S J

A transport code (TRANSP) is used to simulate future deuterium-tritium experiments (DT) in TFTR. The simulations are derived from 14 TFTR DD discharges, and the modeling of one supershot is discussed in detail to indicate the degree of accuracy of the TRANSP modeling. Fusion energy yields and {alpha}-particle parameters are calculated, including profiles of the {alpha} slowing down time, average energy, and of the Alfven speed and frequency. Two types of simulations are discussed. The main emphasis is on the DT equivalent, where an equal mix of D and T is substituted for the D in the initial target plasma, and for the D{sup O} in the neutral-beam injection, but the other measured beam and plasma parameters are unchanged. This simulation does not assume that {alpha} heating will enhance the plasma parameters, or that confinement will increase with T. The maximum relative fusion yield calculated for these simulations is Q{sub DT} {approx} 0.3, and the maximum {alpha} contribution to the central toroidal {beta} is {beta}{sub {alpha}}(0) {approx} 0.5%. The stability of toroidicity-induced Alfven eigenmodes (TAE) and kinetic ballooning modes (KBM) is discussed. The TAE mode is predicted to become unstable for some of the equivalent simulations, particularly after the termination of neutral beam injection. In the second type of simulation, empirical supershot scaling relations are used to project the performance at the maximum expected beam power. The MHD stability of the simulations is discussed.

• Research Organization: Princeton Univ., NJ (United States). Plasma Physics Lab.
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 5928517
• Report Number(s): PPPL-2808; ON: DE92005132
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700330* -- Plasma Kinetics
Transport
& Impurities-- (1992-)
ALFVEN WAVES
ALPHA PARTICLES
BALLOONING INSTABILITY
CHARGED PARTICLES
CLOSED PLASMA DEVICES
D-T REACTORS
EQUILIBRIUM
FUSION YIELD
HYDROMAGNETIC WAVES
INSTABILITY
MHD EQUILIBRIUM
NUCLEAR REACTION YIELD
PLASMA DENSITY
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA SIMULATION
SIMULATION
TEMPERATURE DISTRIBUTION
TFTR TOKAMAK
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTORS
TOKAMAK DEVICES
TRANSPORT THEORY
YIELDS