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Phys. Rev. Lett. 94, 023401 (2005) [4 pages]

Confinement of a Large Number of Antiprotons and Production of an Ultraslow Antiproton Beam

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N. Kuroda1,2, H. A. Torii1, K. Yoshiki Franzen2,*, Z. Wang1, S. Yoneda1, M. Inoue1, M. Hori3, B. Juhász4, D. Horváth5, H. Higaki6, A. Mohri2, J. Eades7, K. Komaki1, and Y. Yamazaki1,2
1Institute of Physics, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
2Atomic Physics Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
3CERN, CH-1211 Genève 23, Switzerland
4Institute of Nuclear Research of the Hungarian Academy of Science, H-4001 Debrecen, Hungary
5KFKI Research Institute of Particle and Nuclear Physics, H-1525 Budapest, Hungary
6Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
7Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

Received 12 May 2003; published 18 January 2005

See accompanying Physics Focus

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 5×106 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.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.023401
DOI:
10.1103/PhysRevLett.94.023401
PACS:
36.10.–k, 39.10.+j, 52.27.Jt, 52.35.Fp

*Present address: Department of Physics, University of Florida, Gainesville, FL 32611, USA.

 
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