Formation of Single Magnetic ReconnecTion Region for Studies of Its JeT and Heating Effects

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A laboratory experiment of magnetic reconnection has been developed in the TS-3 merging device, using two colliding plasma toroids with varied q-value. The conventional two-component reconnection was extended experimentally to three-component reconnections by introducing a new field component Bx parallel to the X-line. Selective ion heating accompanied by a Alfven speed field-aligned jet was documented during the reconnection without Bx, indicating highly-efficient direct conversion of the dissipated magnetic energy into the ion thermal energy. All of ion heating, current-sheet resistivity and reconnection speed increase significantly with decreasing Bx and with increasing the external force to compress the current sheet, revealing for the first time three-component and driven effects of reconnection in the laboratory experiment. The anomalous sheet-current dissipation and the ion heating are both found to depend on ion gyromotion around the current sheet. Once the current-sheet is compressed shorter than the ion gyroradius, its effective resistivity and ion temperature were observed to increase significantly, explaining thosethree-component and driven effects of reconnection.