Antihydrogen Production within a Penning-Ioffe Trap

Department of Physics, Harvard University, Cambridge, MA 02138, USA.
Physical Review Letters (Impact Factor: 7.51). 03/2008; 100(11):113001. DOI: 10.1103/PhysRevLett.100.113001
Source: PubMed


Slow antihydrogen ((H) over bar) is produced within a Penning trap that is located within a quadrupole Ioffe trap, the latter intended to ultimately confine extremely cold, ground-state (H) over bar atoms. Observed (H) over bar atoms in this configuration resolve a debate about whether positrons and antiprotons can be brought together to form atoms within the divergent magnetic fields of a quadrupole Ioffe trap. The number of detected (H) over bar atoms actually increases when a 400 mK Ioffe trap is turned on.

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    • "The required antiprotons are provided by the AD, while positrons are produced by a radioactive source. A liquid helium bath cryostat within a 1 T superconducting solenoid houses both the magnetic and the electromagnetic Penning traps, where both charged constituents are caught and combined to antihydrogen [2], [3]. The potential due to the magnetic field must be higher than the kinetic energy of the antimatter atoms to be caught. "
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