Space-Time Parameters of X-Ray Radiation of Nanosecond Diffuse Discharge in Spike-Plane Gap

Summary form only given. Space-time parameters of an x-ray radiation of a nanosecond diffuse discharge in the air of an atmospheric pressure were studied with a multi-channel photo-electronic and photographic methods. The discharge was formed in a gap rod (cathode)-plane with a gap of 6...12 cm at moderate high voltage rise time of 1.1-10¹³ V/s and a pulse amplitude of 160...280kV. It was established that the x-ray radiation was recorded at the moment of the discharge transition into a conductivity stage after the gap closure. The discharge area, from which the x- ray radiation could be observed, corresponds to the sizes of the discharge luminescence in an optical range. However, intensity distribution of the x-ray radiation along the discharge gap is very non-uniform. Irradiation from the cathode discharge area is rather high. There is almost no radiation from the anode area. Beginnings of the x-ray radiation signals from different discharge areas match each other within the limits of measurement precision (1 ns). An anisotropy of the x-ray radiation was detected. A model of the x-ray radiation generation, in accordance with which the recorded radiation is the electrons breaking radiation, accelerated in the area of the strong field near the cathode. The field amplification in the mentioned area is associated with short removal of the field shielding with volume charges at the discharge transition from the closure stage of the gap to the conductivity stage.