title: Confinement of a large number of antiprotons and production of an ultraslow antiproton beam.
abstract: We have used a radio frequency quadrupole decelerator to decelerate antiprotons emerging from the CERN Antiproton Decelerator from MeV- to keV-scale energy, and collected five decelerated pulses in a multiring trap. Some 5 x 10(6) antiprotons were stacked in this way. Cooling of the trapped antiprotons by a simultaneously trapped electron plasma was studied nondestructively via shifts in plasma mode frequencies. We have also demonstrated the first step in extracting a 10-500 eV antiproton beam from the trap.
authors.affiliation: Institute of Physics, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Kuroda
authors.forename: H A
authors.initials: HA
authors.lastname: Torii
authors.forename: K Yoshiki
authors.initials: KY
authors.lastname: Franzen
authors.forename: Z
authors.initials: Z
authors.lastname: Wang
authors.forename: S
authors.initials: S
authors.lastname: Yoneda
authors.forename: M
authors.initials: M
authors.lastname: Inoue
authors.forename: M
authors.initials: M
authors.lastname: Hori
authors.forename: B
authors.initials: B
authors.lastname: Juhász
authors.forename: D
authors.initials: D
authors.lastname: Horváth
authors.forename: H
authors.initials: H
authors.lastname: Higaki
authors.forename: A
authors.initials: A
authors.lastname: Mohri
authors.forename: J
authors.initials: J
authors.lastname: Eades
authors.forename: K
authors.initials: K
authors.lastname: Komaki
authors.forename: Y
authors.initials: Y
authors.lastname: Yamazaki