Perpendicular laser cooling of a rotating ion plasma in a Penning trap

Wayne M. Itano, L. R. Brewer, Daniel John Larson, D. J. Wineland

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The steady-state temperature of an ion plasma in a Penning trap, cooled by a laser beam perpendicular to the trap axis, has been calculated and measured. The rotation of the plasma, due to crossed E and B fields, strongly affects the minimum attainable temperature. This is because the velocity distribution of the ions, as seen by a laser beam intersecting the plasma at some distance from the axis of rotation, is skewed, and this leads to a change in the velocity distribution (and hence temperature) at which a steady state is attained. The calculated temperature is a function of the intensity, frequency, and position of the laser beam, and of the rotation frequency of the plasma. Temperatures of Be+9 plasmas were measured for a wide range of experimental parameters. The lowest and highest temperatures were approximately 40 mK and 2 K. The measured and calculated temperatures are in agreement.

Original languageEnglish (US)
Pages (from-to)5698-5706
Number of pages9
JournalPhysical Review A
Volume38
Issue number11
DOIs
StatePublished - Jan 1 1988

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laser cooling
traps
ions
laser beams
temperature
velocity distribution
axes of rotation

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Itano, Wayne M. ; Brewer, L. R. ; Larson, Daniel John ; Wineland, D. J. / Perpendicular laser cooling of a rotating ion plasma in a Penning trap. In: Physical Review A. 1988 ; Vol. 38, No. 11. pp. 5698-5706.
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Perpendicular laser cooling of a rotating ion plasma in a Penning trap. / Itano, Wayne M.; Brewer, L. R.; Larson, Daniel John; Wineland, D. J.

In: Physical Review A, Vol. 38, No. 11, 01.01.1988, p. 5698-5706.

Research output: Contribution to journalArticle

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