Model for collisional fast ion diffusion into Tokamak Fusion Test Reactor loss cone

Technical Report · Mon Aug 01 04:00:00 EDT 1994

DOI:https://doi.org/10.2172/10176061· OSTI ID:10176061

Chang, C S ^[1]; Zweben, S J; Schivell, J; Budny, R; Scott, S ^[2]

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1. New York Univ., NY (United States). Courant Inst. of Mathematical Sciences
2. Princeton Univ., NJ (United States). Plasma Physics Lab.

An analytic model is developed to estimate the classical pitch angle scattering loss of energetic fusion product ions into prompt loss orbits in a tokamak geometry. The result is applied to alpha particles produced by deutrium-tritium fusion reactions in a plasma condition relevant to Tokamak Fusion Test Reactor (TFTR). A poloidal angular distribution of collisional fast ion loss at the first wall is obtained and the numerical result from the TRANSP code is discussed. The present model includes the effect that the prompt loss boundary moves away from the slowing-down path due to reduction in banana thickness, which enables us to understand, for the first time. the dependence of the collisional loss rate on Z{sub eff}.

• Research Organization: Princeton Univ., NJ (United States). Plasma Physics Lab.
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 10176061
• Report Number(s): PPPL--3005; ON: DE94017334
• Country of Publication: United States
• Language: English

Related Subjects

664300
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700330
700380
74 ATOMIC AND MOLECULAR PHYSICS
ALPHA PARTICLES
CHARGED-PARTICLE TRANSPORT
COLLISION PHENOMENA
DIFFUSION
ELEMENTARY AND CLASSICAL PROCESSES IN PLASMAS
FIRST WALL
ION-ION COLLISIONS
MAGNETIC FIELD RIPPLES
PARTICLE LOSSES
PLASMA KINETICS, TRANSPORT, AND IMPURITIES
SCATTERING
TFTR TOKAMAK