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Applied Physics B

Laser cooling of a single Ca+ ion: Observation of quantum jumps

S. Urabe, K. Hayasaka, Masayoshi Watanabe, Hidetsuka Imajo, R. Ohmukai, R. Hayashi

Published Nov 1, 1993• 24 citations
Publisher
DOI
10.1007/bf00332462

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This paper describes our recent experimental results on trapping and laser cooling of Ca+ ions. The measurement of the characteristics of laser-cooled Ca+ ions in an rf quadrupole ion trap, such as the fluorescence line shape and phase transition, is described. Observation of two types of collision-induced “quantum jumps” of a Ca+ ion in a background gas of H2 or air is also described. Since the rate of the collision-induced jumps is very high for Ca+, it is necessary to achieve an extremely high vacuum condition for frequency standard applications.