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) The mass spectrum measured by RGA up to 99 amu, showing partial pressure (log scale) vs. mass for different conditions: (a) the red line shows partial pressure measurements when the vacuum valve connected to the 40 L/s ion pump is closed; (b) the blue line shows measurements when the vacuum valve is open.