title: Production, formation, and transport of high-brightness atomic hydrogen beam studies for the relativistic heavy ion collider polarized source upgrade.
abstract: The RHIC polarized H(-) ion source had been successfully upgraded to higher intensity and polarization by using a very high brightness fast atomic beam source developed at BINP, Novosibirsk. In this source the proton beam is extracted by a four-grid multi-aperture ion optical system and neutralized in the H2 gas cell downstream from the grids. The proton beam is extracted from plasma emitter with a low transverse ion temperature of ∼0.2 eV which is formed by plasma jet expansion from the arc plasma generator. The multi-hole grids are spherically shaped to produce "geometrical" beam focusing. Proton beam formation and transport of atomic beam were experimentally studied at test bench.
authors.affiliation: Budker Institute of Nuclear Physics, Novosibirsk, Russia.
authors.forename: A
authors.initials: A
authors.lastname: Kolmogorov
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: G
authors.initials: G
authors.lastname: Atoian
authors.affiliation: Budker Institute of Nuclear Physics, Novosibirsk, Russia.
authors.forename: V
authors.initials: V
authors.lastname: Davydenko
authors.affiliation: Budker Institute of Nuclear Physics, Novosibirsk, Russia.
authors.forename: A
authors.initials: A
authors.lastname: Ivanov
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: J
authors.initials: J
authors.lastname: Ritter
authors.affiliation: Budker Institute of Nuclear Physics, Novosibirsk, Russia.
authors.forename: N
authors.initials: N
authors.lastname: Stupishin
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: A
authors.initials: A
authors.lastname: Zelenski