中文摘要：

在HL-2A等离子体放电过程中，利用CF编码计算出的等离子体边界磁场，计算出Shafranov积分S1，S2和S3，再利用反磁磁通导出极向比压βp，等离子体内自感li，等离子体磁轴的大半径Rm，等离子体的能量Wdia，能量约束时间τE；再用电流矩导出等离子体的电流中心（Rc，Zc）．实时确定这些量对于及时了解和改进装置的放电和改善等离子体性能很有意义．

英文摘要：

During the plasma discharge in HL-2A, the magnetic field at the plasma boundary is computed using currents filaments code. The Shafranov integrals S1, S2 and S3 are deduced; the poloidal beta, internal inductance, the horizontal position of the magnetic axis Rm and the plasma energy Wdia are calculated; the current center of plasma （ Ro, Zo ）is computed with the current moments. The real time determination of these quantities is of significance for understanding and adjusting the HL-2A discharge in time, and for improving plasma performance.