Phys. Rev. Lett. 89, 233401 (2002) [4 pages]Driven Production of Cold Antihydrogen and the First Measured Distribution of Antihydrogen StatesReceived 25 October 2002; published 19 November 2002 Cold antihydrogen is produced when antiprotons are repeatedly driven into collisions with cold positrons within a nested Penning trap. Efficient antihydrogen production takes place during many cycles of positron cooling of antiprotons. A first measurement of a distribution of antihydrogen states is made using a preionizing electric field between separated production and detection regions. Surviving antihydrogen is stripped in an ionization well that captures and stores the freed antiproton for background-free detection. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.233401
DOI:
10.1103/PhysRevLett.89.233401
PACS:
36.10.–k
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