Phys. Rev. Lett. 77, 1962–1965 (1996)Electron Cooling of Protons in a Nested Penning TrapReceived 28 May 1996; published in the issue dated 2 September 1996 Trapped protons cool via collisions with trapped electrons at 4 K. This first demonstration of sympathetic cooling by trapped species of opposite sign of charge utilizes a nested Penning trap. The demonstrated interaction of electrons and protons at very low relative velocities, where recombination is predicted to be most rapid, indicates that this may be a route towards the study of low temperature recombination. The production of cold antihydrogen is of particular interest, and electron cooling of highly stripped ions may also be possible. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.77.1962
DOI:
10.1103/PhysRevLett.77.1962
PACS:
34.80.Bm, 32.80.Pj, 52.25.Wz, 71.60.+z
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