[en] The purpose of this program is to measure cross sections and equilibrium fractions of D⁺ and D₂⁺ ions in metal vapors. In particular, in connection with double charge exchange D^- ion sources, the concern is with D^- formation in alkaline-earth vapor targets. Also, in connection with possible metal vapor contamination in the system, the concern is with cross sections for high energy D⁺, D⁰, and D^- collisions with these metal vapors. Results from this research will fill in a gap in knowledge of single and double charge transfer and multiple collision processes in alkaline-earth targets. During the period covered in this report construction of the apparatus necessary to carry out the program was completed and cross sections and equilibrium fractions for D⁺ + Mg and D⁺ + Ba collisions were measured

No abstract available

[en] The purpose of this program is to measure cross sections and equilibrium fractions of deuterium ions and atoms in metal vapors. In particular, in connection with double charge exchange D^- ion sources, there is concern with D^- formation in alkaline-earth vapor targets. Also, in connection with possible metal vapor contamination in the system, there is concern with cross sections for high energy D⁺, D⁰ and D^- collisions with these metal vapors. Results from this research will fill in a gap in knowledge of single and double charge transfer and multiple collision processes in alkaline-earth targets and provide a better understanding of D^- formation mechanisms. A list of publications is included. 6 references

[en] The objective of this program is to measure atomic collision cross sections and equilibrium fractions of ions and atoms in metal vapor targets. The goal is to obtain experimental information on atomic collision processes of importance to the Magnetic Fusion Energy Program. In particular, in connection with the development of negative ion sources, we have measured D^- formation cross sections in alkaline-earth metal vapor targets. During the period covered in this report we have completed electron transfer cross section measurements of D⁺ ions and D⁰ atoms in collision with calcium and strontium vapor. We have also completed differential cross section measurements for H^- formation in H⁺ + Mg collisions. Finally, state-of-the-art computer instrumentation has been interfaced to the experiment

[en] The objective of the program during the period covered in this report was to begin measurements of excited state formation in H^- stripping collisions. We have measured cross sections for hydrogen atom formation in excited states over the energy range 10 to 60 keV in H^- + Ar, H₂ collisions

[en] The objective of this program is to measure atomic collision cross sections and equilibrium fractions of ions and atoms in metal vapor targets. The goal is to obtain experimental information on atomic collision processes relevant to the Magnetic Fusion Energy Program. In particular, in connection with the development of double charge exchange D^- ion sources, we are measuring D^- formation cross sections in alkaline-earth metal vapor targets. During the period covered in this report we have measured electron transfer cross sections for 3-40 keV D⁺ ions and D⁰ atoms in collision with calcium vapor

[en] The purpose of this program is to measure cross sections and equilibrium fractions of D⁺ and D₂⁺ ions in metal vapors. In particular, in connection with double charge exchange D^- ion sources, concern is with D^- formation in alkaline-earth vapor targets. Also, in connection with possible metal vapor contamination in the system, concern is given to cross sections for high energy D⁺, D⁰ and D^- collisions with these metal vapors. Results from this research will fill in a gap in knowledge of single and double charge transfer and multiple collision processes in alkaline-earth targets. During the period covered construction of the apparatus necessary to carry out the program was completed and cross sections and equilibrium fractions for D⁺ + Mg and D⁺ + Ba collisions were measured. A list of publications is included

No abstract available

[en] The objective of this progrm during the period covered in this report is to measure atomic collision cross sections and equilibrium fractions of ions and atoms in metal-vapor targets. The goal is to obtain experimental information on atomic collision processes of importance to the Magnetic Fusion Energy Program. In particular, (1) in connection with the development of negative ion sources, we have completed our studies of D^- formation in alkaline-earth metal-vapor targets; (2) in connection with lithium-beam probing of the alpha particle distribution in plasmas, we have completed our studies of the relevant cross sections; and (3) in connection with possible neutral helium injection into plasmas, we have measured the He^- fraction in two metal-vapor targets. Finally, we have completed all experimental modifications required in order to pursue our studies of highly excited state formation in H^- stripping

[en] Progress since the last symposium on the study of H^- formation by charge transfer in alkaline-earth vapors is reported. High yields are obtained at low energies, in agreement with theoretical predictions