Driven production of cold antihydrogen and the first measured distribution of antihydrogen states |
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| Authors: | Gabrielse G Bowden N S Oxley P Speck A Storry C H Tan J N Wessels M Grzonka D Oelert W Schepers G Sefzick T Walz J Pittner H Hänsch T W Hessels E A;ATRAP Collaboration |
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| Institution: | Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA. gabrielse@physics.harvard.edu |
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| 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. |
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