Stability of plasma liner implosion

A computational analysis is performed to investigate the suppression mechan ism of magnetohydrodynamic (MHD) instability. Three different techniques ha ve been considered which allow us to reduce the total growth of the instabi lity: 1. doublecascades liner; 2. linear rotation and 3. externally generat ed axial magnetic field. Double gas-puff with specifically structured densi ty: massive inner shell and light outer one for a given current shape makes it possible to suppress significantly the MHD instability evolution. Possi ble mechanism of the instability dumping has been proposed. The load design is being analyzed for the case of liner rotation with initial angular velo city. Different values of the velocities have been considered. The using of an external magnetic field allows us to suppress the instability when the field reaches the specified shape and optimal value. The estimation of the fraction of magnetic energy and energy of rotation in the full energy of th e liner is done. The influence of axial field on MHD instability growth is analyzed.