Generation of disc-like plasma from laser-matter interaction in the presence of a strong external magnetic field
نویسندگان
چکیده
Dynamics of laser produced plasma in a strong magnetic field was studied using a 1MA pulsed power generator coupled to an intense, high-energy laser. A 2–2.5 MG magnetic field was generated on the surface of a rod load 0.8–1.2 mm in diameter. A sub-nanosecond laser pulse with intensity of 3×10W cm was focused on the rod load surface. Side-on laser diagnostics showed the generation of two collimated jets 1–3 mm long on the front and rear sides of the load. End-on laser diagnostics reveal that the laser produced plasma in the MG magnetic field takes the form of a thin disc as the plasma propagates along the magnetic field lines. The disc-like plasma expands radially across the magnetic field with a velocity of 250 km s. An electron temperature of 400 eV was measured in the laser-produced plasma on the rod load.
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