The informational-measuring system of nanosecond (sub-nanosecond) pulse signals

Abstract

The equipment based on modular tools engineering intended for determination of the metrological characteristics of nanosecond (subnanosecond) pulse signals is presented. This equipment containing four-channel measuringcomputer complex (MCC) and primary measuring converters was used for investigations of the streamer-leader discharges and pulse electromagnetic field generators, moreover it can be modified for research and solution of many other problems. This system has high engineering indexes, autonomy and disturbance resistance. After resulting the state certification of the MCC, its full-scale deflection errors of amplitude and duration have been found to be %. According to the original technique based on simulation and experimental measurements of relative and absolute intensities of the 2+(0,0) both 1 (0,0) nitrogen bands emission new results about physical parameters (electric field, electron number density) in streamer head have been obtained. Analyzing the pulse waveforms in these bands, streamer geometrical characteristics have been evaluated. Streamer corona was being observed in a cone-to-hemisphere gap of length cm at voltage 10 kV and air pressure 100 kPa and 35 kPa. On distance 4 mm from anode the electric field is found to be equal to 70*80 kV/cm, electron number density - 0.5 -5-5-1013 cm'3, streamer head radius - 0.1 mm and its propagation velocity - 2*3 • 107 cm-s'1.