mbar压力下温度梯度捕获的冰粒
Ice Particles Trapped by Temperature Gradients at mbar Pressure
摘要：
在实验室实验中，我们观察到夹带在低压大气（~1 mbar）中的冰粒（\leq 100 μm）在不同温度下被三个水库之间的温度梯度捕获。约束元件是250 K下的珀耳帖元件（底部）、77 K下的液氮储存器（顶部）和293 K下的周围真空室。颗粒悬浮和捕获是由热泳，电泳和重力的相互作用建模。许多冰粒被同时捕获在彼此至少长达几分钟的近空间距离内，并可用于进一步的实验。
英文摘要：
In laboratory experiments we observe that ice particles (\leq100 μm) entrained in a low pressure atmosphere (~1 mbar) get trapped by temperature gradients between three reservoirs at different tempertature. Confining elements are a peltier element at 250 K (bottom), a liquid nitrogen reservoir at 77 K (top) and the surrounding vacuum chamber at 293 K. Particle levitation and trapping is modeled by an interplay of thermophoresis, photophoresis and gravity. A number of ice particles are trapped simultaneously in close spatial distance to each other at least up to minutes and are accessible for further experiments.
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