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Phys. Rev. Lett. 105, 013003 (2010) [5 pages]

Evaporative Cooling of Antiprotons to Cryogenic Temperatures

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G. B. Andresen et al. (ALPHA Collaboration)
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Received 9 April 2010; published 2 July 2010

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We report the application of evaporative cooling to clouds of trapped antiprotons, resulting in plasmas with measured temperature as low as 9 K. We have modeled the evaporation process for charged particles using appropriate rate equations. Good agreement between experiment and theory is observed, permitting prediction of cooling efficiency in future experiments. The technique opens up new possibilities for cooling of trapped ions and is of particular interest in antiproton physics, where a precise CPT test on trapped antihydrogen is a long-standing goal.

© 2010 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.105.013003
DOI:
10.1103/PhysRevLett.105.013003
PACS:
37.10.Mn, 52.25.Dg, 52.27.Jt, 64.70.fm