Transport simulations of the ignited ITER with high helium fraction
Computer simulations with special versions of the one dimensional BALDUR predictive transport code have been carried out to investigate the particle confinement helium and hydrogen, the energy confinement and the burn control of the high density scenario of the ITER (CDA) physics phase. The code uses empirical transport coefficients for ELMy-H mode plasmas, an improved model of the scrape-off layer (SOL), an impurity radiation model for helium and iron, and fast burn control by neutral beam injection feedback. A self-sustained thermonuclear burn was achieved for hundreds of seconds. The necessary radiation corrected energy confinement time tau(E) is found to be 4.2 s, which is attainable according to the ITER H-mode scaling. In the ignited ITER, a significant dilution of the DT fuel by helium takes place. Steady state helium fractions of up to 8 % are obtained, which are compatible with self-sustained burn.
Bibliographic Reference: Article: Nuclear Fusion, Vol. 34 (1994), No. 4, pp. 507-518
Record Number: 199410984 / Last updated on: 1994-11-28
Original language: en
Available languages: en