Collisional stochastic ripple diffusion of alpha particles and beam ions on TFTR

Technical Report · Sat Jul 01 00:00:00 EDT 1995

DOI:https://doi.org/10.2172/90234· OSTI ID:90234

Redi, M H; Zarnstorff, M C; White, R B; Budny, R V; Janos, A C; Owens, D K; Schivell, J F; Scott, S D; Zweben, S J

Predictions for ripple loss of fast ions from TFTR are investigated with a guiding center code including both collisional and ripple effects. A synergistic enhancement of fast ion diffusion is found for toroidal field ripple with collisions. The total loss is calculated to be roughly twice the sum of ripple and collisional losses calculated separately. Discrepancies between measurements and calculations of plasma beta at low current and large major radius are resolved when both effects are included for neutral beam ions. A 20--30% reduction in alpha particle heating is predicted for q{sub a} = 6--14, R = 2.6 m DT plasmas on TFTR due to first orbit and collisional stochastic ripple diffusion.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 90234
• Report Number(s): PPPL-3011-R; ON: DE95016245; TRN: 95:017922
• Resource Relation: Other Information: PBD: Jul 1995
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
TFTR TOKAMAK
PARTICLE LOSSES
GUIDING-CENTER APPROXIMATION
BEAM INJECTION HEATING
ALPHA PARTICLES
TRANSPORT THEORY
COMPUTERIZED SIMULATION
O CODES
STOCHASTIC PROCESSES
COMPARATIVE EVALUATIONS
THEORETICAL DATA