Author/Authors :
Sonato، نويسنده , , P. and Baker، نويسنده , , W.R. and Beaumont، نويسنده , , P. and Damiani، نويسنده , , C. and Fiorentin، نويسنده , , P. and Guigon، نويسنده , , A. and Fullard، نويسنده , , K. and Goodyear، نويسنده , , A. and Grando، نويسنده , , L. and Huntley، نويسنده , , S. and Lam، نويسنده , , N. and Lioure، نويسنده , , A. and Loving، نويسنده , , A. and Marcuzzi، نويسنده , , D. and Mills، نويسنده , , S. and Peruzzo، نويسنده , , S. and Pomaro، نويسنده , , N. and Riccardo، نويسنده , , V. and Way، نويسنده , , M.، نويسنده ,
Abstract :
Halo currents (HCs), flowing through the plasma and the vacuum vessel during plasma disruptive events, induce severe mechanical stresses in the plasma facing components and in the vessel, and are a major concern for present and future fusion experiments like ITER.
w system of halo current sensors (HCS) designed for JET-EP (enhanced performance, EP) should help to evaluate HC density distribution, localization and rotation as well as toroidal and poloidal current asymmetries.
S system will include four identical mechanical structures each including eight Rogowski coils and two toroidal pick-up coils. The Rogowski coils will measure directly the current flowing through some of the tiles of the upper dump plate. The toroidal field pick-up coils will estimate the total poloidal HC.
il assemblies are installed at the top of the vessel close to secondary X-point in four octants equally spaced along the toroidal coordinate.
paper, the design and the manufacturing of the HCS system are presented in detail.
Keywords :
ITER , Halo currents , JET-EP , JET , Halo current sensors
