Dynamics of high-density -pinch plasma driven by a spinning gas-puff plasma annulus

Abstract

The implosion dynamics of a high-density fibre plasma driven by a spinning Z-pinch is investigated. Spin coupling with the inner fibre plasma is taken into consideration. Numerical results show that the coupling can affect the plasma dynamics and reduce the maximum achievable density and temperature. Thus the large spin needed to prevent the Rayleigh-Taylor instability can adversely affect fusion conditions. For intermediate spin and coupling, high densities and temperatures can be realized for fibres seeded with high-Z impurities.

Thermonuclear fusion in a multicascade liner staged pinch

“…This assumption is valid since the large inductive heating caused by the fast changing magnetic flux of the axial magnetic field and the flux of radiation emitted by the imploding gas-puff is good enough to evaporate and ionize the fiber or the straw. The equation describing the dynamics of the inner fiber pinch plasmã Mirza et al, 1998 …”

Study of Plasma Parameters in a Spinning Thick-Gas-Puff Staged Pinch

“…We further assume that due to mechanical or electromagnetic interaction with the imploding outer plasma shell, the ¢ber plasma also acquires some spin which is a fraction (f 0 ) of the outer Z-pinch plasma spin o f 0 O). The equation describing the dynamics of the inner pinch [20], is…”

Radiative collapse in an impurity-seeded spinning gas-puff staged pinch

“…We also assume that, owing to mechanical or electromagnetic interaction with the imploding outer plasma shell, the fibre plasma also acquires a spin that is a fraction f 0 of the outer Z-pinch plasma spin ω (= f 0 Ω). The equations describing the dynamics of the staged pinch (Mirza et al 1998) are…”

“…It may be noted here that the main mechanism for heating and compression is the adiabatic compression process that appears in the later stages of collapse and is more effective when the plasma is relatively cold. Thus seeding the plasma with a high-Z impurity would increase the radiative loss in the early stage of Ohmic heating, keeping the plasma at a low temperature (Pease 1957;Braginskii 1958;Chittenden and Haines 1990). Once a high density and high temperature have been achieved, thermonuclear fusion should take place.…”