title: Driven production of cold antihydrogen and the first measured distribution of antihydrogen states.
abstract: 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.
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA. gabrielse@physics.harvard.edu
authors.forename: G
authors.initials: G
authors.lastname: Gabrielse
authors.forename: N S
authors.initials: NS
authors.lastname: Bowden
authors.forename: P
authors.initials: P
authors.lastname: Oxley
authors.forename: A
authors.initials: A
authors.lastname: Speck
authors.forename: C H
authors.initials: CH
authors.lastname: Storry
authors.forename: J N
authors.initials: JN
authors.lastname: Tan
authors.forename: M
authors.initials: M
authors.lastname: Wessels
authors.forename: D
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authors.lastname: Grzonka
authors.forename: W
authors.initials: W
authors.lastname: Oelert
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authors.lastname: Schepers
authors.forename: T
authors.initials: T
authors.lastname: Sefzick
authors.forename: J
authors.initials: J
authors.lastname: Walz
authors.forename: H
authors.initials: H
authors.lastname: Pittner
authors.forename: T W
authors.initials: TW
authors.lastname: Hänsch
authors.forename: E A
authors.initials: EA
authors.lastname: Hessels