Thermal effects on the dynamics of a two-gas gas-puff Ζ–θ pinch

Abstract

The imploding plasma column of a gas-puff Ζ-pinch has been used to compress the target-gas-embedded axial magnetic field in the presence of plasma pressure. The dynamics of a two-gas gas-puff Ζ-θ pinch is studied with different forms of applied current profiles. We find that the inclusion of a kinetic pressure term introduces the usual β–term, which delays and reduces the maximum compression. On the other hand, for fixed β, compression at an earlier time can be achieved for a large density ratio of the test to the driver gas at the interface position. For the pressure-free case, our earlier results are completely recovered.

Compression enhancement by current stepping in a multicascade liner gas-puff Z-pinch plasma

“…1 and 3.5). It has also been observed earlier [30,35] that increasing the value M 02 /M 01 reduces the compression. In this way, for suitable choices of the ratio of the initial mass per unit length (M 02 /M 01 ) and puff thickness δ 2 , additional current is employed to enhance the compression for the gain of better plasma parameters at the final stage of the implosion.…”

“…A current stepping technique (as proposed by Lee [31]) has been employed to enhance the plasma parameter of interest at the final stage of implosion. Equations (2.1)-(2.3) were solved numerically for the UCI [6,35] and IHCE-GIT-4 [20] machines. The typical parameters chosen for the UCI machine were under the stability criterion proposed by De Groot et al [29].…”

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

“…In the past, Nasim et al [19], have investigated the dynamics of a two-gas gas-puff z-pinch plasma with different forms of applied current profiles by using a modified snow-plow model [20]. In this paper, we have investigated the detailed dynamics of double gas-puff staged pinch plasma using a modified snow-plow model with kinetic pressure effects.…”