Investigation of dynamic and stability of laser-produced plasma in strong transverse magnetic field

The paper presents results of investigations of the process of the creation of a diamagnetic cavity by a laser-produced plasma in a strong transverse magnetic field of 10 T in induction. The plasma was produced from a flat, t eflon target by an Nd laser of 5 J in energy and about 1 ns in pulse durati on. The investigations were carried on by means of a three-frame interferom etry and a non-contact magnetic probe, a so called remote magnetic probe (R MP). For the needs of this work, we developed a methodology for the measure ment of the dimensions of the cavity during its expansion by means of the R MP, taking into account the plasma expansion geometry that is specific to f lat targets. The dynamics of the process of creation of the diamagnetic cav ity, its shape and dimensions have been determined. A very good consistency of dimensions of the diamagnetic cavity and plasma boundary in their quasi steady state, obtained with both diagnostics,, allows us to apply the RMP m ethod not only for the investigation of diamagnetic properties of various l aser-produced plasmas, but also for the evaluation of their initial kinetic energy and its transformation in magnetic field.