Numerical study of evaporative cooling in the space station

In this paper, we numerically studied the effects of mechanical vibration and magnetic fields on evaporative cooling process carried in space station by direct simulation Monte Carlo method. Simulated with the vibration data of international space station, we found that the cooling process would suf...

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Published inJournal of physics. B, Atomic, molecular, and optical physics Vol. 54; no. 1; pp. 15302 - 15309
Main Authors Fan, Bo, Zhao, Luheng, Zhang, Yin, Sun, Jingxin, Xiong, Wei, Chen, Jinqiang, Chen, Xuzong
Format Journal Article
LanguageEnglish
Published IOP Publishing 16.01.2021
Subjects
BEC
evaporative cooling
microgravity
numerical study
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Summary:In this paper, we numerically studied the effects of mechanical vibration and magnetic fields on evaporative cooling process carried in space station by direct simulation Monte Carlo method. Simulated with the vibration data of international space station, we found that the cooling process would suffer great atomic losses until the accelerations reduced tenfold at least. In addition, if we enlarge the s-wave scattering length five times by feshbach resonance, the phase space density increased to 50 compared to 3 of no magnetic fields situation after 5 s evaporative cooling. We also simulated the two stages crossed beam evaporative cooling process under both physical impacts and obtain 4 × 105 85Rb atoms with a temperature of 8 pK. These results are of significance to the cold atom experiments carried out on space station in the future.
Bibliography:JPHYSB-106227.R1
ISSN:0953-4075
1361-6455
DOI:10.1088/1361-6455/abc72d