Dense sheet z-pinches

The steady state and quasi-steady processes of infinite- and finite-width sheet z-pinches are studied. The relations corresponding to the Bennett relation and Pease-Braginskii current of cylindrical fiber z-pinches depend on a geometrical factor in the sheet z-pinches. The finite-width sheet z-pinch is approximated by a segment of infinite-width select z-pinch. if it is wide enough, and corresponds to a number of (width/thickness) times fiber z-pinch I,plasmas of the diameter that equals the sheet thickness. If the select current equals this number times the fiber current, the plasma created in the sheet x-pinches is as den;se as in the filer z-pinches. The total energy of plasma and magnetic field per unit mass is approximately equal in built pinches, Quasistatic transient processes are different in several aspects from the filer z-pinch. No radiation collapse occurs in the sheet 2-pinch. The stability is improved in the sleet z-pinches. The fusion criterions and the experimental arrangements to produce the sheet 2-pinches are also discussed.