Journal Papers

Hu, Z. Q.

Wei, L (reprint author), Dalian Univ Technol, Sch Phys, Minist Educ, Key Lab Mat Modificat Beams, Dalian 116024, Peoples R China.

Ye, C.,Wei, L.,Wang, Z. X.

2020-01-01

PHYSICS OF PLASMAS

EI、SCIE

J

27

1

1070-664X

The explosive behavior of neo-classical double tearing mode (NDTM) is numerically investigated by a reduced four-field-drift-magnetohydrodynamic code [Ye et al., Nuclear Fusion 59, 096044 (2019)] with the bootstrap current effect. It is numerically observed that the explosive burst of NDTM can be absolutely suppressed by diamagnetic drift flow. The dependence of the critical value of diamagnetic drift flow V0*c for avoiding the explosion on typical plasma parameters is numerically studied in detail. It is found that V0*c decreases with increasing Delta rs, while it increases with an increasing bootstrap current fraction. The plasma viscosity and resistivity can raise the threshold through their effects on the rotation of magnetic islands and the instability of system, respectively. Furthermore, the perpendicular transport and parallel transport, which are significant to the driven effects of the bootstrap current, have the opposite effects on V0*c. The underlying mechanisms are discussed. Published under license by AIP Publishing.