Pulsed-Beam Techniques Used with a Tandem Van De Graaff Accelerator

A compact pulsed-bean ion source injector was developed and installed on The University of Texas Tandem Accelerator. The injector consists of a direct extraction negative ion source coupled to a 100 keV Coskroft-Walton accelerator. Improvements in the arrangement and fabrication of the high voltage components of the injector are discussed. R. F. pulsing and klystron bunching of the ion beam is done before entering the tandem and a simple inexpensive method of rejecting the retrace component of the pulsed beam is presented. Pertinent pulsed beam characteristics measured under fast neutron time-of-flight experimental conditions are given.