Influence of contraction of a cesium pulse-periodic discharge on its luminous efficacy and spectral properties

The paper presents the results of a study of pulse-periodic discharge cesium lighting lamps with discharge tubes 5 mm in diameter and an interelectrode distance of 55 and 22 mm. The cesium pressure varied from 10 to 750 Torr at a constant triangular current pulse with an amplitude of 80 A. It is shown that the maximum of the luminous efficacy (~ 65 lm/W) corresponds to a pressure of ~ 130 Torr. It was found that a discharge column in the long tube at a pressure of ~ 300 Torr contracted into a bright pinch with a diameter close to that of the electrodes (2 mm). The pinch was localized along the surface of the tube and moves randomly on it. Contraction leads to a repeated increase in the luminous efficacy with pressure up to ~ 70 lm/W. Wall stabilization limits the plasma temperature on the axis of the pinch (it was found from the recombination continuum) to the level of 6000 – 6500 K. The column in short tube is localized along the axis of the tube over the entire power range. The temperature in it quickly rises to 13000-– 14000 K after the maximum of the luminous efficacy.

Исследования воздействия пинчевых плазмоидов в периодическом разряде в потоке жидкости на окружающую среду

Periodic discharge in a flow of liquid is one of the effective ways of modifying the surface of metal products in order to increase their durability, hardness and corrosion resistance. Researching of the properties of the discharge in order to determine the limits of capability of this method and the optimization of technological regimes revealed a number of physical phenomena that were not previously known. Consideration of these factors is necessary when determining safety measures in the implementation of industrial technologies. A new element is the consideration of detected anomalous manifestations of new formations such as balls, tracks and threads in the environment.

Видеорегистрация долгоживущих плазмоидов вблизи объектов, подвергшихся дистанционному и непосредственному воздействию пинчевых сильноточных разрядов

The results of observation of plasmoids that were formed during periodic discharge in a flow of liquid, in particular, water, in its surrounding space during discharge and in post-discharge, have been presented. The presence of long-lived luminous formations not only in the air, but also on the surface and above the surface of nearby objects has been noted. The reasons for the appearance of such objects and their properties, which have features not only of macro-, but also micro-objects, such as Dirac’s monopole, have been analyzed.