Correlation between nuclear reaction yields induced by fast and slow ions in the DPF

Summary form only given, as follows. Nuclear reaction yields Y(HZ) induced by fast ions were measured by activation methods. An array of GM-counters measures the radioactivity from reaction products in the plasma deposited on or induced by D/sup +/ ions, on Cu foils wrapping the detectors. DPF (W=7 kJ) operates with plasmas of different compositions of high-Z (/sup 12/C, /sup 14/N, /sup 16/O) and low-Z (/sup 2/H, /sup 3/He) elements with comparable abundances. Reactions sensitive to the slow ion (E/sub i/<0.4 MeV) population are D(d,n) and /sup 3/He(d,p), while others (HZ-LZ) effectively require energies of LZ ions of E/sub i/>1 MeV. As an example the relations between Y(HZ) and D(d,n) neutron yield, Y/sub n/ are shown. From the same discharge over a series of discharges with fillings consisting of /sup 2/H+/sup 3/He+/sup 16/O and /sup 2/H+/sup 14/N+/sup 16/O. Y(HZ) is always recalculated to the values that would be obtained if the plasma were composed of two elements of equal atomic densities. We show the relation between Y(HZ) induced in the plasma by trapped fast ions and on Cu foils by ejected fast D/sup +/ ions. For all considered plasma compositions, a quadratic dependance exists between Y(HZ, fast) and Y(LZ, slow) while the relation between Y(HZ, fast) induced simultaneously in the plasma and in the external targets is linear.