Electron Cooling of Protons in a Nested Penning Trap

Phys. Rev. Lett. 77, 1962 – Published 2 September 1996
D. S. Hall and G. Gabrielse


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.

DOI: http://dx.doi.org/10.1103/PhysRevLett.77.1962

  • Received 28 May 1996
  • Published in the issue dated 2 September 1996

© 1996 The American Physical Society

Authors & Affiliations

D. S. Hall and G. Gabrielse

  • Department of Physics, Harvard University, Cambridge, Massachusetts 02138

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