Electron spectrometers for the study of artificially injected particles during the ARAKS experiments

This paper describes the particle experiments carried out entirely by the French section of the ARAKS collaboration. Spectrometers were designed to measure the angle and energy distribution of electrons in 4 ms at 8 energy levels from 4 to 35 keV in 9 angular fields. They were launched on Eridan rockets. Wide-angle detectors especially designed to avoid disturbing wave measurements, were launched on the nose-cone. (Auth.)