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Report No.
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ITER test blanket module error field simulation experiments at DIII-D

Schaffer, M. J.*; Snipes, J. A.*; Gohil, P.*; de Vries, P.*; Evans, T. E.*; Fenstermacher, M. E.*; Gao, X.*; Garofalo, A. M.*; Gates, D. A.*; Greenfield, C. M.*; Heidbrink, W. W.*; Kramer, G. J.*; La Haye, R. J.*; Liu, S.*; Loarte, A.*; Nave, M. F. F.*; Osborne, T. H.*; Oyama, Naoyuki; Park, J.-K.*; Ramasubramanian, N.*; Reimerdes, H.*; Saibene, G.*; Salmi, A.*; Shinohara, Koji; Spong, D. A.*; Solomon, W. M.*; Tala, T.*; Zhu, Y. B.*; Boedo, J. A.*; Chuyanov, V.*; Doyle, E. J.*; Jakubowski, M.*; Jhang, H.*; Nazikian, R. M.*; Pustovitov, V. D.*; Schmitz, O.*; Srinivasan, R.*; Taylor, T. S.*; Wade, M. R.*; You, K.-I.*; Zeng, L.*; DIII-D Team*

Experiments at DIII-D investigated the effects of ferromagnetic error fields similar to those expected from proposed ITER Test Blanket Modules (TBMs). Studied were effects on: plasma rotation and locking; confinement; L-H transition; edge localized mode (ELM) suppression by resonant magnetic perturbations; ELMs and the H-mode pedestal; energetic particle losses; and more. The experiments used a 3-coil mock-up of 2 magnetized ITER TBMs in one ITER equatorial port. The experiments did not reveal any effect likely to preclude ITER operations with a TBM-like error field. The largest effect was slowed plasma toroidal rotation v across the entire radial profile by as much as $$Delta v/v_{0} sim 50%$$ via non-resonant braking. Changes to global $$Delta n/n_{0}$$, $$Delta v/v_{0}$$ and $$Delta H_{98}/H_{98,0}$$ were $$sim$$3 times smaller. These effects are stronger at higher $$beta$$ and lower $$v_{0}$$. Other effects were smaller.

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Category:Physics, Fluids & Plasmas

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