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

在TS-3合并装置中，利用两个不同q值的等离子体环面相互碰撞，进行了室内磁重联实验。通过引入平行于x线的新场分量Bx，将传统的双分量重联扩展到三分量重联。在无Bx的重联过程中，记录了伴随Alfven速度场对准射流的选择性离子加热，表明耗散的磁能高效地直接转化为离子热能。随着Bx的减小和压缩电流片外力的增大，离子加热、电流片电阻率和重联速度均显著增大，首次在实验室实验中揭示了重联的三分量驱动效应。发现异常的片电流耗散和离子加热都依赖于离子在电流片周围的回旋运动。一旦电流片被压缩到比离子陀螺半径短，观察到其有效电阻率和离子温度显着增加，这解释了重联的三分量和驱动效应。

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.