Transport simulations of ITER helium exhaust using recent data from TFTR, TEXTOR and JT-60
Insufficient helium exhaust can seriously degrade the performance of any fusion reactor and has recently been identified as a potentially significant issue for ITER. The effects of variations of the ratios D{sup He}/{chi}i, D{sup He}/D{sup D}, v{sup He}/D{sup He} and of the sawtooth period on helium exhaust in ITER are studied with BALDUR code transport simulations. Recent measurements of D{sup He}/{chi}i, at TFTR, of D{sup He}/D{sup D} at TEXTOR of v{sup He}/D{sup He} at TFTR, TEXTOR, and JT-60 are found compatible with sustained ignition and helium exhaust requirements for ITER. Ignition is found to be critically sensitive to the ratio v{sup He}/D{sup He}, particularly at the plasma edge, and to reduced sawtooth period. These critical dependencies are moderated for reduced helium recycling at the separatrix and for hollow particle diffusivity profiles. 17 refs., 9 figs., 1 tab.
- Research Organization:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC02-76CH03073
- OSTI ID:
- 5722757
- Report Number(s):
- PPPL-2765; ON: DE91015374
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HELIUM ASH
TRANSPORT THEORY
B CODES
COMPUTERIZED SIMULATION
DIFFUSION
ELECTRON TEMPERATURE
EXHAUST GASES
ITER TOKAMAK
SAWTOOTH OSCILLATIONS
CHARGED PARTICLES
CLOSED PLASMA DEVICES
COMPUTER CODES
FLUIDS
GASEOUS WASTES
GASES
HELIUM IONS
IONS
OSCILLATIONS
SIMULATION
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
WASTES
700103* - Fusion Energy- Plasma Research- Kinetics