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Alpha effects on TAE modes and alpha transport

Conference ·
OSTI ID:10112256
; ; ; ; ;  [1]; ;  [2]; ; ;  [3]
  1. Princeton Univ., NJ (United States). Plasma Physics Lab.
  2. Massachusetts Inst. of Tech., Cambridge, MA (United States). Plasma Fusion Center
  3. Oak Ridge National Lab., TN (United States)
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In a fusion reactor any unanticipated loss of alpha power could result in serious wall damage, impurity influx, major operational control problems, and even a failure to sustain ignition. Neutral beam injection (NBI) experiments in large tokamaks have indicated that toroidicity-induced Alfven eigenmode (TAE) can be strongly unstable and cause the loss of about half of the fast beam ions. This level of loss would be unacceptable in fusion reactors. Recent experiments in TFTR indicate that TAE modes can also be excited by energetic particles heated by ICRF. Stability of TAE modes in the presence of alpha particles had previously been studied by employing a global kinetic-MHD stability code (NOVA-K). The alpha transport due to a single toroidal mode number TAE mode had also been studied by using a Hamiltonian guiding center orbit code, ORBIT. In Section 1 we present the properties of the TAE mode, the effects of alpha particles on TAE instabilities for TFTR D-T and ITER experiments. The alpha transport due to multiple toroidal mode number TAE modes and a stochastic transport theory are presented.
Research Organization:
Oak Ridge National Lab., TN (United States)
Sponsoring Organization:
USDOE, Washington, DC (United States)
DOE Contract Number:
AC05-84OR21400; AC02-76CH03073; AC02-78ET51013
OSTI ID:
10112256
Report Number(s):
CONF-920913--24; IAEA-CN--56/D-2-1(C); ON: DE93004160
Country of Publication:
United States
Language:
English

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Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700330
700340
ALFVEN WAVES
ALPHA PARTICLES
CHARGED-PARTICLE TRANSPORT
DIFFUSION
HAMILTONIANS
PHASE SPACE
PLASMA INSTABILITY
PLASMA KINETICS, TRANSPORT, AND IMPURITIES
PLASMA WAVES, OSCILLATIONS, AND INSTABILITIES
TOKAMAK DEVICES