Influence of the Magnetic Field on Particle Dynamics in Capillary Discharge of the Soft X-ray Laser

In this paper the experimentally observed phenomenon [1-3] Z-pinch evolution in the capillary discharge of the ultra-violet and soft x-ray laser is theoretically investigated. Experimental and computer researches [4] are also devoted to the capillary discharge. The cylindrical plasma system is considered as a thin tube a capillary with length L and diameter D with the large voltage, applied to it. The experiments with the capillary discharge are carried out for generation of Nelike line of argon (λ=46.9 nm). Consideration of this phenomenon from the point of view of the plasma particle dynamics is of interest in connection with the importance of the problem of the X-ray generation in economic compact systems, in particular, with the use of the capillary discharge and wide applications of the X-ray radiation. In 1994 Rokka has offered to use the capillary discharge for the laser radiation generation on the Ne-like line of argon (λ=46.9 nm) [5]. In comparison with the installations, using management by the laser, for generation of X-ray laser radiation the installations, based on the capillary discharge, are inexpensive, compact, and have high factor of transformation of the electric energy in the energy of laser radiation. One can increase the energy of laser radiation due to increase of the pulse duration. However, the soft X-ray laser, based on the capillary discharge, generates nanosecond pulses. The width and amount of pulses are limited by the plasma dynamics and by the time of maintenance of optimum plasma conditions. In this paper the possibility of increase of quantity of flashes of soft X-ray laser radiation due to application of a small external magnetic field during development of the capillary discharge is considered. The influence of a longitudinal magnetic field on pinch development is investigated in [6].