Design study of a heavy ion RFQ linac

A 4-rod RFQ cold-model with 6-posts structure was build and tested for preliminary design study of a heavy ion RF linac. We obtained a general dependance of the resonant frequency upon the height of the electrode-supporting-structure. Measurements were also done for Q-values, and the longitudinal electric-field distributions. Meanwhile a computer program has been developed for cutting a RFQ electrode on NC-milling machine. This program's final output is a file which contains a table of cutter-path's coordinates and corrected transverse radii of curvature. (author)