Ice Particles Trapped by Temperature Gradients at mbar Pressure

Details Ice Particles Trapped by Temperature Gradients at mbar Pressure Ice Particles Trapped by Temperature Gradients at mbar Pressure

2011-11-04

arxiv.org/abs/1111.1068v1

Physics

Instrumentation and Detectors

Published in Review of Scientific Instruments 82, 2011, 4 pages, 6 figures

Scientific paper

In laboratory experiments we observe that ice particles (\leq100 \mu m) 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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