[en] The discharge chamber is an aluminium torus, measuring 80 cm (about 2'8'') large medium diameter and 8 cm (about 3'5'') small diameter. The torus contains a double disruption, formed by two isolating mantles, to prevent short-circuiting of the discharge by the metallic partitions. Openings have been provided for the purpose of studying the characteristics of the discharge by means of electro or magnetic sounding apparatus (double sounding type). A constant longitudinal field (maximum value of the order of 5000 gauss) can be established. One can also realize pre-ionization from the chamber gas by means of an H.F. generator (27 MHz). The energy for the generating of the discharge is drawn from a 31 condenser battery, forming a total of 62 μF, 50 kV. The studies already accomplished, and those we anticipate chiefly bear upon the following points: 1) the starting off and intensity of current in the discharge as regards the following parameters: a) intensity and electric field, b) initial pressure of filling, c) intensity of the longitudinal magnetic field, d) pre-ionization, e) length of the isolating disruptions; 2) cinematographic study of the section of discharge in the course of time; 3) spectrographic study of the discharge; 4) research of electrons accelerated during the discharge; 5) research of electronic density, electronic temperature, and of longitudinal and azimuthal magnetic fields in the discharge as regards distance, at the center of column of the discharge and as regards time; 6) the use of micro-waves for the study of the characteristics of the discharge. (author)