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Phys Rev Lett. 2001 Jun 4;86(23):5266-9.

Stability of a charged particle in a combined Penning-Ioffe trap.

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1
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.

Abstract

The axial symmetry of a familiar Penning trap is broken by adding the radial magnetic field of an Ioffe trap. Despite the resulting loss of a confinement theorem, stable orbits related to adiabatic invariants are identified, expressions are given for their frequencies, and resonances that must be avoided are characterized. It seems feasible to experimentally realize the new Penning-Ioffe trap to test these theoretical predictions. It also may be possible to simultaneously confine cold positrons and antiprotons in a Penning-Ioffe trap, along with any cold antihydrogen they may form.

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