Transport simulations of helium exhaust in iter using recent data from tftr, textor and jt-60

M. H. Redi; S. A. Cohen; E. J. Synakowski

doi:10.1088/0029-5515/31/9/007

Transport simulations of helium exhaust in iter using recent data from tftr, textor and jt-60

M. H. Redi, S. A. Cohen, E. J. Synakowski

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Abstract

Insufficient helium exhaust can seriously degrade the performance of any fusion reactor and has recently been identified as a potentially significant issue for the International Thermonuclear Experimental Reactor (ITER). The effects of variations of the ratios D_He/χ_i, D_He/D_D and v_He/D_He and of the sawtooth period on helium exhaust in ITER have been studied with BALDUR code transport simulations. Recent measurements of D_He/χ_i in TFTR, of D_He/D_D in TEXTOR and of v_He/D_He in TFTR, TEXTOR and JT-60 are found to be compatible with the requirements of sustained ignition and helium exhaust for ITER. Ignition is found to be critically sensitive to the ratio v_He/D_He, particularly at the plasma edge, and to a reduced sawtooth period. These critical dependences are moderated for reduced helium recycling at the separatrix and for hollow particle diffusivity profiles.

Original language	English (US)
Pages (from-to)	1689-1694
Number of pages	6
Journal	Nuclear Fusion
Volume	31
Issue number	9
DOIs	https://doi.org/10.1088/0029-5515/31/9/007
State	Published - Sep 1991

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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10.1088/0029-5515/31/9/007

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abstract = "Insufficient helium exhaust can seriously degrade the performance of any fusion reactor and has recently been identified as a potentially significant issue for the International Thermonuclear Experimental Reactor (ITER). The effects of variations of the ratios DHe/χi, DHe/DD and vHe/DHe and of the sawtooth period on helium exhaust in ITER have been studied with BALDUR code transport simulations. Recent measurements of DHe/χi in TFTR, of DHe/DD in TEXTOR and of vHe/DHe in TFTR, TEXTOR and JT-60 are found to be compatible with the requirements of sustained ignition and helium exhaust for ITER. Ignition is found to be critically sensitive to the ratio vHe/DHe, particularly at the plasma edge, and to a reduced sawtooth period. These critical dependences are moderated for reduced helium recycling at the separatrix and for hollow particle diffusivity profiles.",

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AB - Insufficient helium exhaust can seriously degrade the performance of any fusion reactor and has recently been identified as a potentially significant issue for the International Thermonuclear Experimental Reactor (ITER). The effects of variations of the ratios DHe/χi, DHe/DD and vHe/DHe and of the sawtooth period on helium exhaust in ITER have been studied with BALDUR code transport simulations. Recent measurements of DHe/χi in TFTR, of DHe/DD in TEXTOR and of vHe/DHe in TFTR, TEXTOR and JT-60 are found to be compatible with the requirements of sustained ignition and helium exhaust for ITER. Ignition is found to be critically sensitive to the ratio vHe/DHe, particularly at the plasma edge, and to a reduced sawtooth period. These critical dependences are moderated for reduced helium recycling at the separatrix and for hollow particle diffusivity profiles.

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Transport simulations of helium exhaust in iter using recent data from tftr, textor and jt-60

Abstract

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