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Experimental progress in gravity measurement with an atom interferometer |
Min-kang ZHOU (周敏康), Zhong-kun HU (胡忠坤, ), Xiao-chun DUAN (段小春), Bu-liang SUN (孙布梁), Jin-bo ZHAO (赵锦波), Jun LUO (罗俊) |
| School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China |
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Abstract Precisely determining gravity acceleration g plays an important role on both geophysics and metrology. For gravity measurements and high-precision gravitation experiments, a cold atom gravimeter with the aimed resolution of 10-9g/Hz1/2 (1 g=9.8 m/s2) is being built in our cave laboratory. There will be four steps for our 87Rb atom gravimeter, Magneto–Optical Trap (MOT) for cooling and trapping atoms, initial state preparation, π/2-π-π/2 Raman laser pulse interactions with cold atoms, and the final state detection for phase measurement. About 108 atoms have been trapped by our MOT and further cooled by moving molasses, and an atomic fountain has also been observed.
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| Keywords
gravity measurement
atom interferometry
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Corresponding Author(s):
Zhong-kun HU (胡忠坤),Email:ggg@mail.hust.edu.cn
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Issue Date: 05 June 2009
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