Confinement of a large number of antiprotons and production of an ultraslow antiproton beam

• Published in: Physical review letters 2005-01, Vol.94 (2), p.023401.1-023401.4, Article 023401
• Main Authors: KURODA, N, TORII, H. A, MOHRI, A, EADES, J, KOMAKI, K, YAMAZAKI, Y, FRANZEN, K. Yoshiki, WANG, Z, YONEDA, S, INOUE, M, HORI, M, JUHASZ, B, HORVATH, D, HIGAKI, H
• Format: Article
• Language: English
• Subjects: Atomic and molecular physics; Basic studies of specific kinds of plasmas; Electrostatic waves and oscillations (e.g., ion-acoustic waves); Electrostatic waves and oscillations (eg, ion-acoustic waves); Exact sciences and technology; Exotic atoms and molecules (containing mesons, muons, and other unusual particles); Nonneutral plasmas; Physics; Physics of gases, plasmas and electric discharges; Physics of plasmas and electric discharges; Studies of special atoms, molecules and their ions; clusters; Waves, oscillations, and instabilities in plasmas and intense beams
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.94.023401

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.