Integrated physics analysis of plasma start-up scenario of helical reactor FFHR-d1. (29th May 2015)

• Record Type: Journal Article
• Authors: Goto, T.; Miyazawa, J.; Sakamoto, R.; Seki, R.; Suzuki, C.; Yokoyama, M.; Satake, S.; Sagara, A.
• Other Names: collab.
• Is Part Of: Nuclear fusion. Volume 55:Number 6(2015:Jun.)
• Publication Date: 2015-05-29
• Subjects: heliotron -- plasma start-up scenario -- reactor design -- MHD equilibrium -- neoclassical transport; Nuclear fusion -- Periodicals; 621.48405
• DOI: 10.1088/0029-5515/55/6/063040
• Languages: English
• ISSNs: 0029-5515

Abstract

Abstract: 1D physics analysis of the plasma start-up scenario of the large helical device (LHD)-type helical reactor FFHR-d1 was conducted. The time evolution of the plasma profile is calculated using a simple model based on the LHD experimental observations. A detailed assessment of the magnetohydrodynamic equilibrium and neo-classical energy loss was conducted using the integrated transport analysis code TASK3D. The robust controllability of the fusion power was confirmed by feedback control of the pellet fuelling and a simple staged variation of the external heating power with a small number of simple diagnostics (line-averaged electron density, edge electron density and fusion power). A baseline operation control scenario (plasma start-up and steady-state sustainment) of the FFHR-d1 reactor for both self-ignition and sub-ignition operation modes was demonstrated.