[Table of Contents]

Plasma and Fusion Research

Volume 5, S1008 (2010)

Review Articles

Integrated Performance and Critical Issues for Steady-State Operation in JT-60U
Yoshiteru SAKAMOTO and the JT-60 team
Japan Atomic Energy Agency, 801-1, Mukouyama, Naka, Ibaraki, 311-0193, Japan
(Received 19 January 2009 / Accepted 1 September 2009 / Published 26 March 2010)

Abstract

This paper reports on the integrated performance achieved in JT-60U toward the steady-state operation foreseen in the ITER and DEMO reactors. Advanced tokamak plasmas with weak shear or reversed shear have been optimized to confront critical issues such as high-beta operation with high confinement, the compatibility of high-density operation with high confinement, and long sustainment with a high non-inductive current drive fraction. As a result, high-integrated performance was achieved in both plasma regimes. For example, high-confinement reversed shear plasmas with a high bootstrap current fraction exceeding the no-wall beta limit have been obtained in the reactor relevant q95∼5.3; high values of βN∼2.7, HH98y2∼1.7, ne/nGW∼0.87, and fBS∼0.9 are simultaneously achieved with a reversed q profile with qmin∼2.3.

Keywords

advanced tokamak, integrated performance, DEMO reactor, high beta, high density, high confinement, long sustainment

DOI: 10.1585/pfr.5.S1008

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This paper may be cited as follows:

Yoshiteru SAKAMOTO and the JT-60 team, Plasma Fusion Res. 5, S1008 (2010).