EPS 2019

P4.1056 Poloidal currents in COMPASS vacuum vessel during symmetrical disruptions: measurements using diamagnetic loop and comparison with CarMa0NL modelling

11 Jul 2019, 14:00

2h

Building U6 (University of Milano-Bicocca UNIMIB)

MCF Poster P4

Speaker

V. Yanovskiy (EPS 2019)

Description

See full abstract here
http://ocs.ciemat.es/EPS2019ABS/pdf/P4.1056.pdf

For the first time diamagnetic measurements were used to calculate poloidal current in the tokamak vacuum vessel during thermal and current quenches as was recently proposed in [1]. The experimental results are compared with analytical predictions [2] and numerical modelling with CarMa0NL code [3] considering the wall resistivity and geometry. The COMPASS tokamak has a unique set of diagnostics for measuring of poloidal distribution of poloidal current in the vessel, specifically, 3x24 sensors for the toroidal magnetic field (toroidal Mirnov coils) in three different toroidal locations [4, 5]. This feature allowed to distinguish between different poloidal harmonics of the poloidal current and to perform comparison with the diamagnetic measurements.

[1] Pustovitov V D 2019 Fusion Eng. Des. 138 53-58 [2] Pustovitov V D 2017 Fusion Eng. Des. 117 1-7 [3] Villone F et al 2013 Plasma Phys. Control. Fusion 55 095008 [4] Panek R et al 2006 Czech. J. Phys. 56 B125 [5] Knight P J et al 2000 Nucl. Fusion 40 325