トーラスプラズマ合体を用いた3次元局所磁気リコネクションの実験的検証

抄録

Three-dimensional (3-D) localized magnetic reconnection was studied experimentally in TS-4 spherical torus (ST) merging device. When strong compression force I_Acc∼ 60 kA compressed two STs with small guide field B_X/B_¦¦∼ 1, toroidal modes n=1-3 of current sheet was observed to grow only during their reconnection. A new finding is that deformation of curret sheet causes the reconnection rate to increase. When weak compression force I_Acc∼ 0 kA compressed two STs with large guide field B_X/B_¦¦∼ 7, their reconnection rate was maintained small. These phenomena indicate that 3-D localized reconnection is one of fast reconnection mechanisms.