Some Advances in Negative Ion Technology

The state of negative ion technology at this time is undergoing a substantial transition. Beams have been produced from a large number of species of the periodic table and ways can be seen which will allow almost any species to be accelerated successfully. Because of the great usefulness of negative ions, I believe that a National effort should be made to exploit the possibilities of these sources by developing the calculational techniques which we described earlier, and by the development of various types of negative ion sources.