Research on this grant can be divided into two general topics: (1) determination of electron capture cross sections between impurity ions and hydrogen atoms needed for diagnostic studies of magnetic fusion plasmas, and (2) studies into reactions important in neutral beam ion source work. For topic (1) during last year, we completed cross section calculations for B/sup 3 +/ and Be/sup 2 +/ on H using the molecular state approach for energies between 50 eV/u and 10 keV/u. At higher energies, 40 keV/u to 140 keV/u, we have completed classical trajectory Monte Carlo calculations to determine the nl electron capture cross sections for He/sup 2 +/, C/sup 6 +/, N/sup 7 +/ and O/sup 8 +/ on H collisions. For ion source work, topic (2), collisional studies were completed for negative ion formation in the process H + Na ..-->.. H/sup -/ + Na/sup +/.