The interaction of the ITER first wall with magnetic perturbations

Boozer, Allen H.

doi:10.1088/1741-4326/abe226

The interaction of the ITER first wall with magnetic perturbations

Journal Article · 17 March 2021 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/abe226· OSTI ID:1849489

Abstract

Mitigation of the multiple risks associated with disruptions and runaway electrons in tokamaks involves competing demands. Success requires that each risk be understood sufficiently that appropriate compromises can be made. Here the focus is on the interaction of short timescale magnetic-perturbations with the structure in ITER that is closest to the plasma, blanket modules covered by separated beryllium tiles. The effect of this tiled surface on the perturbations and on the forces on structures is subtle. Indeterminacy can be introduced by tile-to-tile shorting. A determinate subtlety is introduced because electrically separated tiles can act as a conducting surface for magnetic perturbations that have a normal component to the surface. A practical method for including this determinate subtlety into plasma simulations is developed. The shorter the timescales and the greater the localization, particularly in the toroidal direction, the more important the magnetic effects of the tiles become.

Research Organization:: Columbia Univ., New York, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: FG02-03ER54696; SC0018424; SC0019479

OSTI ID:: 1849489

Journal Information:: Nuclear Fusion, Vol. 61, Issue 4; ISSN 0029-5515

Publisher:: IOP Science

Country of Publication:: United States

Language:: English

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