Loss of cold atoms due to collisions with residual gases in free flight and in a magneto-optical trap<xref rid="cpb_27_7_073701_fn1" ref-type="fn">*</xref> <fn id="cpb_27_7_073701_fn1"> <label>*</label> <p>Project supported by the Ministry of Science and Technology of China (Grant No. 2013YQ09094304).</p> </fn>

Loss of cold atoms due to collisions with residual gases in free flight and in a magneto-optical trap* *

Project supported by the Ministry of Science and Technology of China (Grant No. 2013YQ09094304).

Xiang Jing-feng^{1, 2}, Cheng He-nan^{1, 2}, Peng Xiang-kai^{1, 2}, Wang Xin-wen^{1, 2}, Ren Wei¹, Ji Jing-wei¹, Liu Kang-kang¹, Zhao Jian-bo¹, Li Lin¹, Qu Qiu-zhi¹, Li Tang¹, Wang Bin¹, Ye Mei-feng¹, Zhao Xin¹, Yao Yuan-yuan¹, Lü De-Sheng^{1, †}, Liu Liang^{1, ‡}

(color online) MOT loading dynamics. The vertical axis shows the photodiode current after switching on the AOMs at time t = 0. Data points are the experimentally measured values for the ⁸⁷Rb MOT. Red points show measurements when the vacuum valve connected to the 40 L/s ion pump is open, and the green points show measurements when the vacuum valve is closed. The two solid (black) curves are the fit of the experimental data to the exponential form of Eq. (2).