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 5s evaporative cooling. We also simulated the two stages crossed beam evaporative cooling process under both physical impacts and obtain 4 10^{5 85}Rb 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.

本文通过直接模拟蒙特卡洛方法，数值研究了机械振动和磁场对空间站蒸发冷却过程的影响。根据国际空间站的振动数据，我们发现冷却过程将遭受巨大的原子损失，直到加速度至少降低十倍。另外，如果通过feshbach共振将s波的散射长度扩大5倍，则与5s的蒸发冷却后的无磁场的情况相比，相空间密度增加到50。我们还模拟了在两种物理冲击下的两阶段横梁蒸发冷却过程，得出4 10 ^{5 85}Rb原子的温度为8 pK。这些结果对未来在空间站进行的冷原子实验具有重要意义。