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Phys. Rev. E 70, 026501 (2004) [5 pages]

Radial compression of protons and H3+ ions in a multiring trap for the productionof ultralow energy antiproton beams

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H. Higaki1,*, N. Kuroda1, K. Yoshiki Franzen1,†, Z. Wang1,‡, M. Hori2, A. Mohri3, K. Komaki1, and Y. Yamazaki1,3
1Institute of Physics, University of Tokyo, 3-8-1, Komaba, Meguro, Tokyo 153-8902 Japan
2CERN, CH-1211 Geneva 23, Switzerland
3RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 Japan

Received 13 November 2003; published 24 August 2004

Radial compression of a proton cloud was performed in a multiring trap which was designed to trap and cool a large number of antiprotons for the production of low-energy (10–1000 eV) antiproton beams. The resonance frequency for the radial compression was almost constant from 3×105 to 3×106 protons. The collision process of the trapped protons was also investigated to estimate the energy of the protons inside the trap. This technique will be applied to the ASACUSA experiment at the antiproton decelerator, CERN, to extract ultraslow antiprotons with good emittance.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.70.026501
DOI:
10.1103/PhysRevE.70.026501
PACS:
41.85.Ar, 41.85.Ct, 41.75.−i, 34.70.+e

*Present address: Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan.

†Present address: LIGO Livingston Observatory, P. O. Box 940, Livingston, LA 70754, USA.

‡Present address: Hitachi High-Technologies Corporation, 882 Ichege, Hitachinaka, Ibraki, 312-8504 Japan.

 
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