INVESTIGATION OF THE TRANSMISSION AND STOPPING OF LIGHT IONS PASSING THROUGH A PLASMA TARGET

Les pertes d'énergies et la transmission de faisceaux de carbone et de soufre au travers d'un plasma d'hydrogène (2 eV) ont été étudiées expérimentalement. Les mesures de pertes d'énergies dans un gaz d'électrons libres indiquent un pouvoir d'arrêt renforcé conformément aux prédictions théoriques.Transmission and energy losses of 2 MeV/u Carbon and Sulphur beams passing through a plasma target, have been extensively investigated. A hydrogen plasma ignited by an electrical discharge was coupled to the Orsay Tandem beam accelerator. Fluctuations in beam transmission have been observed and attributed to a magnetic focusing effect generated during the plasma evolution. Energy loss measurements were performed on the basis of time of flight techniques and indicate an enhanced stopping power of the plasma relative to its cold matter equivalent