title: Acceleration of nitrogen ions to 7.4 gev in the princeton particle accelerator.
abstract: Nitrogen ions in charge states N(5+) and N(6+) have been accelerated in the Princeton Particle Accelerator to 4 and 7.4 billion electron volts (Gev), respectively. An external N(5+) beam of 1 x 10(6) particles per second has been obtained and focused to a 6-millimeter-diameter spot. The N(6+) beam was about 2 x 10(5) particles per second. The total charge-changing collision cross section of N(5+) in water vapor was determined as a function of ion energy. The improvement in vacuum necessary to increase the N(5+) beam at least tenfold was calculated. The N(6+) total cross section is probably smaller than that of N(5+) at the higher energies.
authors.forename: M G
authors.initials: MG
authors.lastname: White
authors.forename: M
authors.initials: M
authors.lastname: Isaila
authors.forename: K
authors.initials: K
authors.lastname: Prelec
authors.forename: H L
authors.initials: HL
authors.lastname: Allen