Light-induced evaporative cooling in a magneto-optical trap |
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Authors: | Ma Hong-Yu Cheng Hua-Dong Wang Yu-Zhu and Liu Liang |
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Institution: | Key Laboratory of Quantum Optics, Shanghai
Institute of Optics and Fine Mechanics, Chinese Academy of
Sciences, Shanghai 201800, China; Key Laboratory of Quantum Optics, Shanghai
Institute of Optics and Fine Mechanics, Chinese Academy of
Sciences, Shanghai 201800, China;Graduate School of the Chinese Academy of Sciences,
Beijing 100039, China |
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Abstract: | This paper presents an experimental demonstration of light-induced
evaporative cooling in a magneto-optical trap. An additional laser
is used to interact with atoms at the edge of the atomic cloud in
the trap. These atoms get an additional force and evaporated away
from the trap by both the magnetic field and laser fields. The
remaining atoms have lower kinetic energy and thus are cooled. It
reports the measurements on the temperature and atomic number after
the evaporative cooling with different parameters including the
distance between the laser and the centre of the atomic cloud, the
detuning, the intensity. The results show that the light-induced
evaporative cooling is a way to generate an ultra-cold atom source. |
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Keywords: | evaporative cooling magneto-optical trap |
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