Finite-β Effect on the Dynamics of Double Gas-Puff Staged Pinch

Abstract

The implosion dynamics of a dense θ-pinch plasma driven by a double gas-puff z-pinch is re-examined in the presence of kinetic pressure. A modified snow-plow model has been used to describe the dynamics of such a staged pinch plasma. The inclusion of kinetic pressure introduces the usual plasma β-term. Numerical results demonstrate that the thermonuclear fusion parameters can be achieved in a dense θ-pinch Deuterium-Tritium (D-T) fiber plasma for an optimum choice of density ratio of the test to driver gas at the interface position (α-parameter) of imploding z-pinch plasma and kinetic to magnetic pressure ratio (β-factor). Thus double gas-puff staged pinch device can be a more feasible approach to achieve fusion conditions with an enhanced stability.