Island divertor configuration design for a quasi-axisymmetric stellarator CFQS. (August 2020)

• Record Type: Journal Article
• Authors: Okamura, S.; Liu, H.; Shimizu, A.; Kinoshita, S.; Isobe, M.; Xiong, G.; Xu, Y.
• Is Part Of: Journal of plasma physics. Volume 86:Number 4(2020)
• Publication Date: 2020-08
• Subjects: fusion plasma, -- plasma devices, -- plasma confinement; Plasma (Ionized gases) -- Periodicals; 530.4405
• DOI: 10.1017/S0022377820000732
• Languages: English
• ISSNs: 0022-3778

Abstract

Abstract : A magnetic field configuration of an island divertor for a quasi-axisymmetric stellarator (CFQS) is proposed. The configuration incorporates large islands surrounding the core confinement region. The interface between the core region and the peripheral region of the island divertor is a clear magnetic separatrix similar to a tokamak divertor. The structure of divertor magnetic field lines is very regular without stochasticity and the connection length is sufficiently long for good divertor performance. Such a divertor configuration is produced in the magnetic field configuration for the CFQS device, which is now under construction in China.