Abstract in atti di convegno, 2021, ENG

Dynamics and Confinement of Ultralow-q Plasmasin the RFX-mod Device

Zuin M.; Agostini M.; Auriemma F.; Bonfiglio D.; Cappello S.; Carraro L.; Cavazzana R.; Franz P.; Marrelli L.; Martines E.; Puiatti M.E.; Piovan R.; Spizzo G.; Terranova D.; Zanca P.; Zaniol B.; Zanotto L.

CNR ISTP, Istituto per la Scienza e Tecnologia dei Plasmi, Sede di Padova, Italy; Consorzio RFX (CNR, ENEA, INFN, Università di Padova, Acciaierie Venete SpA), Padova, Italy.

Experimental UltraLow q, ULq q(a)< 1 plasma dynamics study in RFX mod device. Good agreement with non linear 3 D visco resistive MHD simulations. Both almost quiescent and largely fluctuating plasmas strongly sensitive on q(a Tendency of a dominant single mode (kink or resonant internal mode. Magnetic reconnection determines magnetic topology. Flat T e profiles for q(a) 0 5 internal gradients emerge for 0 5 q(a) 1 at low n e core localized thermal structures associated to single helical states. High electron density regimes, n e n G 1 accessible with peaking factors 1. Energy confinement time t E 1 ms with I p 800 kA. No wall locking detected, no double resonant m 1 mode observed.

FEC 2020 - 28th IAEA Fusion Energy Conference, Virtual Event Europe/Vienna timezone, 10-15 May 2021

Keywords

RFX-mod, Dynamics of Ultralow-q Plasmas, Confinement of Ultralow-q Plasmas, MHD

CNR authors

Martines Emilio, Marrelli Lionello, Spizzo Gianluca, Terranova David, Zuin Matteo, Agostini Matteo, Bonfiglio Daniele, Auriemma Fulvio, Carraro Lorella, Cappello Susanna

CNR institutes

ISTP – Istituto per la Scienza e Tecnologia dei Plasmi