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Laser cooling of a small number of Be+ ions in a penning trap (1993)

Imajo, H. ; Urabe, S. ; Hayasaka, K. ; [et al.]

Springer

Applied physics 57 (1993), S. 141-144

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ISSN: 1432-0649

Keywords: 32.80.Pj ; 05.70.Fh ; 34.40.+n

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract Be+ ions stored in a Penning trap were cooled by a laser beam perpendicular to the magnetic field. The cooled ions are strongly coupled and phase transitions of up to 100 ions were observed. In experiments with only a few ions stored in the trap, a stepwise decrease in fluorescence intensity was observed. All steps are of the same size and so every step is attributed to a single ion. The discrete changes in fluorescence occurred more frequently when the background pressure was increased, caused by collisions between stored ions and background neutral molecules.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00425998

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