Axisymmetric MHD Simulation of ITB Crush and Following Disruption Dynamics of Tokamak Plasmas with High Bootstrap Current
N. Takei1), Y. Nakamura*, Y. Kawano*, H. Tsutsui1), T. Ozeki*, K. Tobita*,
1) Tokyo Institute of Technology, Tokyo, Japan
In JT-60U, a fast current quench of the major disruption, which places a key design limit on a vacuum vessel and plasma facing components, was observed in a Reversed Shear (RS) mode of high performance discharges with strong ITB (Internal Transport Barrier) [1]. Hence, it is particularly important to clarify the mechanism governing such a fast current quench and to understand not well-known disruption characteristics of RS plasmas with a high bootstrap current fraction generated by ITB in an advanced tokamak scenario [2].
References
[1] Y. Kawano. M. Sugihara, T. Ozeki and M. Shimada, 30th EPS Conference on Controlled Fusion and Plasma Physics, P-2.129, St Petersburg, Russia, July 7-11, 2003.
[2] N. Takei, Y. Nakamura et. al., 30th EPS Conference on Controlled Fusion and Plasma Physics, P-2.127, St Petersburg, Russia, July 7-11, 2003. [3] S.C. Jardin, N. Pomphery and J. Delucia, J. Comput. Phys. 66 (1986) 481. [4] Y. Nakamura, H. Tsutsui, N. Takei, et. al., 30th EPS Conference on Controlled Fusion and Plasma Physics, P-2.128, St Petersburg, Russia, July 7-11, 2003.
1) Present address: Plasma Analysis Division, Naka Fusion Research Establishment, Japan Atomic Energy Research Institute, Naka-machi, Ibaraki-ken 311-0193, Japan
e-mail: takein@fusion.naka.jaeri.go.jp |