Gaussian Beam Effect on Equivalence Principle Test Using Free-Fall Interferometry
YAN Qin1, ZHOU Ze-Bing1, LONG Zhang-Cai1, LUO Jun1, ZHANG Yuan-Zhong2, NIE Yu-Xin3
1Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
2Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080
3Institute of Physics, Chinese Academy of Sciences, Beijing 100080
Gaussian Beam Effect on Equivalence Principle Test Using Free-Fall Interferometry
YAN Qin1;ZHOU Ze-Bing1;LONG Zhang-Cai1;LUO Jun1;ZHANG Yuan-Zhong2;NIE Yu-Xin3
1Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
2Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080
3Institute of Physics, Chinese Academy of Sciences, Beijing 100080
Abstract： We discuss the Gaussian beam effect on test of the equivalence principle using a free-fall interferometer. A two-lens assembly is used to improve the propagating character of the laser beam, and the beam radius is collimated to about 3.0 mm. The analysis shows that the gravity acceleration difference induced by the Gaussian beam effect could be less than 10-15g for our double free-fall experimental design, but it would be 10-9g for the absolute measurement of the gravity acceleration with usual single free-fall method.
YAN Qin;ZHOU Ze-Bing;LONG Zhang-Cai;LUO Jun;ZHANG Yuan-Zhong;NIE Yu-Xin. Gaussian Beam Effect on Equivalence Principle Test Using Free-Fall Interferometry[J]. 中国物理快报, 2002, 19(2): 169-171.
YAN Qin, ZHOU Ze-Bing, LONG Zhang-Cai, LUO Jun, ZHANG Yuan-Zhong, NIE Yu-Xin. Gaussian Beam Effect on Equivalence Principle Test Using Free-Fall Interferometry. Chin. Phys. Lett., 2002, 19(2): 169-171.
2002, Vol. 19 
