Accession Number : AD0418222

Title :   He-, H2-, AND OTHER NEGATIVE ION BEAMS AVAILABLE FROM A DUOPLASMATRON ION SOURCE WITH GAS CHARGE EXCHANGE,

Corporate Author : FLORIDA STATE UNIV TALLAHASSEE

Personal Author(s) : Carter,E.B. ; Davis,R.H.

Report Date : 25 OCT 1962

Pagination or Media Count : 4

Abstract : Negative helium-ion beams have been produced in a commercial negative-ion source in which positiv ely charged beams from a duoplasmatron ion source are converted in a gas charge exchange canal. Beams of negative helium ions with cur rents up to 30 m micron A have been injected into a tandem Van de Graaff accelerator, and alpha particle beams have been obtained from the ac celerator with energies up to 19 MeV and currents up to 20 m micron A. The results of several ex periments which were performed to determine the source operating characteristics for negative helium ions are presented. In addition to the peak corresponding to the He- beam, many other peaks are observed in the momentum distribution of the beam from the negative ion source. Con firming evidence has been found for the existence of the H2- ion. (Author)

Descriptors :   (*ION SOURCES, ION ACCELERATORS), ION BEAMS, MAGNETIC FIELDS, ALPHA PARTICLES, ALPHA CROSS SECTIONS, PROTONS, HELIUM, HYDROGEN, GAS DISCHARGES.

Distribution Statement : APPROVED FOR PUBLIC RELEASE