Progress of the JT-60SA project

Abstract

The JT-60SA project implemented by Japan and Europe is progressing on schedule towards the first plasma in March 2019. After careful R&D, procurements of the major components have entered their manufacturing stages. In parallel, disassembly of JT-60U has been completed on time, and the JT-60SA tokamak assembly is expected to start in January 2013. The JT-60SA device, a highly shaped large superconducting tokamak with a variety of plasma control actuators, has been designed in order to contribute to ITER and to complement ITER in all the major areas of fusion plasma development necessary to decide DEMO reactor construction. Detailed assessments and prediction studies of the JT-60SA plasma regimes have confirmed these capabilities: using ITER-and DEMOrelevant plasma regimes, heating conditions, and its sufficiently long discharge duration, JT-60SA enables studies on magnetohydrodynamic stability at high beta, heat/particle/momentum transport, high-energy ion physics, pedestal physics including edge localized mode control, and divertor physics. By integrating these studies, the project provides 'simultaneous and steady-state sustainment of the key performance characteristics required for DEMO' with integrated control scenario development.

Development of a dual frequency (110/138 GHz) gyrotron for JT-60SA and its extension to an oscillation at 82 GHz

“…It should be noted that the phase correcting mirrors are optimized only for 110 GHz, as mentioned above. Thus, the amplitude and phase profile at the inlet of the waveguide is not HE 11 profile at 138 GHz. However, we confirmed that the low diffraction loss of ~ 4% is obtained at 138 GHz by optimizing the beam injection angle into the waveguide.…”

“…In Japan Atomic Energy Agency (JAEA), the JT-60U tokamak is under upgrading to JT-60SA [11] that is a super-conducting tokamak constructed as a joint project of a satellite tokamak project of Broader Approach (BA) and a Japanese national project. In JT-60SA, an ECH/ECCD system [12] will be used by upgrading the existing ECH/ECCD system used for JT-60U [2].…”

Progress of JT-60SA Project: EU-JA joint efforts for assembly and fabrication of superconducting tokamak facilities and its research planning

“…The mission of the JT-60SA (JT-60 Super Advanced) Project is to contribute to the early realization of fusion energy [1][2][3][4]. In order to accomplish the mission, intensive study on long pulse high pressure and high performance plasmas is indispensable.…”

Cryogenic thermometry for refrigerant distribution system of JT-60SA

“…JT-60SA is foreseen in the Broader Approach Agreement as the satellite tokamak for ITER [1]. The upgrade to a superconducting device is underway using infrastructure of the existing JT-60.…”