Laser-cooling effects in few-ion clouds of Yb+ |
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Authors: | C S Edwards P Gill H A Klein A P Levick W R C Rowley |
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Institution: | (1) National Physical Laboratory, TW11 OLW Teddington, Middlesex, UK |
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Abstract: | We report some laser-cooling effects in a few172Yb+ ions held in a Paul trap. Pronounced cloud-to-crystal phase transitions have been observed as discontinuities in the Yb+ fluorescence spectrum of the 369 nm cooling transition. The first reported two-dimensional images of Yb+ clouds with evidence of crystal structure have been recorded using a photon-counting position-sensitive detector. An ion temperature of 100 mK has been estimated from the size of a single ion image. Step-wise cooling of a re-heated, few-ion Yb+ cloud was also observed. |
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Keywords: | 32 80 Pj |
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