JT60-SA construction and research strategy

Yutaka Kamada

National Institutes for Quantum and Radiological Science and Technology (QST)

Tuesday, October 27, 2020

10:00am

Remote

PSFC Seminars

Abstract: JT-60SA is a highly shaped large superconducting Tokamak device with R/a =3m/1.2m, I_p^max =5.5MA, plasma heating = 41MW x 100s. The project mission of JT-60SA is to contribute to early realization of fusion energy by supporting the exploitation of ITER and by complementing ITER in resolving key physics and engineering issues for DEMO with a variety of plasma actuators (heating, current drive, momentum input, stability control coils, resonant magnetic perturbation coils, W-shaped divertor, fuelling, pumping, etc) . The plasma heating system includes Positive-ion source NBs (85keV, 100sec, 20MW by 12 unit, co-/counter-/parpendicular), Negative-ion source NBs (500keV, 100sec, 10MW by 2 units), ECH with multiple frequency Gyrotron (110GHz & 138GHz for 100s and 82GHz for 1 sec) with movable launchers.

Construction of JT-60SA tokamak was completed in March 2020 and the integrated commissioning is now underway.  Manufacture and assembly of all the main tokamak components have been successfully completed satisfying technical requirements including functional performances and dimensional accuracies. Development of plasma actuators and diagnostics is also going well such as achievement of long sustainment of high energy intense negative ion beam. Commissioning of the power supply and the cryoplant has also satisfied requirements. Development of all the control systems and evaluation procedures of tokamak operation has been completed. These experiences of assembly, integrated commissioning and plasma operation of JT-60SA contribute to ITER risk mitigation and efficient implementation of ITER operation.

Bio:  

Present Position: Deputy Director General, Naka Fusion Institute, National Institutes for Quantum and Radiological Science and Technology (QST); Japanese member of ITER Council; Japanese member of ITER Science and Technology Advisory; Committee (STAC); Project Leader of JT-60SA (up to Jul. 2020)

Education: 1988/March, Ph.D. The University of Tokyo, Dep. Nuclear Engineering

Research fields: Tokamak experiment in JT-60U - Development of steady-state high integrated performance tokamak plasma - Study on edge and pedestal physics, core confinement, high beta stability

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Topic: PSFC Seminar: Y. Kamata
Time: Oct 27, 2020 10:30 AM Eastern Time (US and Canada)

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