We present experimental results on the formation
of supersonic, radiatively cooled jets driven by pressure
due to the toroidal magnetic field generated by the 1.5 MA,
250 ns current from the MAGPIE generator. The morphology
of the jet produced in the experiments is relevant to
astrophysical jet scenarios in which a jet on the axis of a
magnetic cavity is collimated by a toroidal magnetic field
as it expands into the ambient medium. The jets in the experiments
have similar Mach number, plasma beta and cooling
parameter to those in protostellar jets. Additionally the
Reynolds, magnetic Reynolds and Peclet numbers are much
larger than unity, allowing the experiments to be scaled to
astrophysical flows. The experimental configuration allows
for the generation of episodic magnetic cavities, suggesting
that periodic fluctuations near the source may be responsible
for some of the variability observed in astrophysical jets.
Preliminary measurements of kinetic, magnetic and Poynting
energy of the jets in our experiments are presented and discussed, together with estimates of their temperature and
trapped toroidal magnetic field.